Search

Your search keyword '"Condon D"' showing total 156 results
Start Over Author "Condon D"
156 results on '"Condon D"'

1. De Bruijn Polyominoes

Author

Condon, D., Wang, Yuxin, and Yang, E.

Subjects
Mathematics - Combinatorics
Abstract

We introduce the notions of de Bruijn polyominoes and prismatic polyominoes, which generalize the notions of de Bruijn sequences and arrays. Given a small fixed polyomino $p$ and a set of colors $[n]$, a de Bruijn polyomino for $(p,n)$ is a colored fixed polyomino $P$ with cells colored from $[n]$ such that every possible coloring of $p$ from $[n]$ exists as a subset of $P$. We call de Bruijn polyominoes for $(p,n)$ of minimum size $(p,n)$-prismatic. We discuss for some values of $p$ and $n$ the shape of a $(p,n)$-prismatic polyomino $P$, the construction of a coloring of $P$, and the enumeration of the colorings of $P$. We find evidence that the difficulty of these problems may depend on the parity of the size of $p$

Published
2024

2. Stratigraphy and geochronology of the Tambien Group, Ethiopia: Evidence for globally synchronous carbon isotope change in the Neoproterozoic

Author

Swanson-Hysell, N. L, Maloof, A. C, Condon, D. J, Jenkin, G. R. T, Alene, M., Tremblay, M. M, Tesema, T., Rooney, A. D, and Haileab, B.

Subjects
Neoproterozoic Era, carbon isotope, Ethiopia, geochronology, stratigraphy
Abstract

The Neoproterozoic Era was an interval characterized by profound environmental and biological transitions. Existing age models for Neoproterozoic nonglacial intervals largely have been based on correlation of carbonate carbon isotope values, but there are few tests of the assumed synchroneity of these records between basins. In contrast to the ash-poor successions typically targeted for Neoproterozoic chemostratigraphy, the Tonian to Cryogenian Tambien Group (Tigray region, Ethiopia) was deposited in an arc-proximal basin where volcanic tuffs suitable for U-Pb geochronology are preserved within the mixed carbonate-siliciclastic sedimentary succession. The Tambien Group culminates in a diamictite interpreted to correlate to the ca. 717–662 Ma Sturtian snowball Earth glaciation. New physical stratigraphic data and high-precision U-Pb dates from intercalated tuffs lead to a new stratigraphic framework for the Tambien Group that confirms identification of negative δ13C values from Assem Formation limestones with the ca. 800 Ma Bitter Springs carbon isotope stage. Integration with data from the Fifteenmile Group of northwestern Canada constitutes a positive test for the global synchroneity of the Bitter Spring Stage and constrains the stage to have started after 811.51 ± 0.25 Ma and to have ended before 788.72 ± 0.24 Ma. These new temporal constraints strengthen the case for interpreting Neoproterozoic carbon isotope variation as a record of large-scale changes to the carbon cycle and provide a framework for age models of paleogeographic change, geochemical cycling, and environmental evolution during the radiation of early eukaryotes.

Published
2015

5. Scoping report on the material requirements for a UK hydrogen economy

Author

Bentham, M., Condon, D., Price, F., Bentham, M., Condon, D., and Price, F.

Abstract

This scoping study assesses the raw material demand associated with the scale-up of a UK hydrogen economy, with particular focus on proton exchange membrane (PEM) electrolyser technology and platinum-group metals (PGM), specifically platinum and iridium. It considers their applications and importance; mineral production and supply chains; competing demands, and UK import reliance and key dependencies. It identifies potential supply-demand challenges and explores opportunities throughout the supply chain to ensure PGM supply can sustainably support PEM electrolyser growth. The research is based on a combination of literature review, analysis of trade statistics and stakeholder consultation.

Published
2023

7. Bottom up Construction of a Personality Taxonomy

Author

Condon, D, Wood, D, Mottus, R, Booth, T, Costantini, G, Greiff, S, Johnson, W, Lukaszewski, A, Murray, A, Revelle, W, Wright, A, Ziegler, M, Zimmermann, J, Condon D. M., Wood D., Mottus R., Booth T., Costantini G., Greiff S., Johnson W., Lukaszewski A., Murray A., Revelle W., Wright A. G. C., Ziegler M., Zimmermann J., Condon, D, Wood, D, Mottus, R, Booth, T, Costantini, G, Greiff, S, Johnson, W, Lukaszewski, A, Murray, A, Revelle, W, Wright, A, Ziegler, M, Zimmermann, J, Condon D. M., Wood D., Mottus R., Booth T., Costantini G., Greiff S., Johnson W., Lukaszewski A., Murray A., Revelle W., Wright A. G. C., Ziegler M., and Zimmermann J.

Abstract

In pursuit of a more systematic and comprehensive framework for personality assessment, we introduce procedures for assessing personality traits at the lowest level: nuances. We argue that constructing a personality taxonomy from the bottom up addresses some of the limitations of extant top-down assessment frameworks (e.g., the Big Five), including the opportunity to resolve confusion about the breadth and scope of traits at different levels of the organization, evaluate unique and reliable trait variance at the item level, and clarify jingle/jangle issues in personality assessment. With a focus on applications in survey methodology and transparent documentation, our procedures contain six steps: (1) identification of a highly inclusive pool of candidate items, (2) programmatic evaluation and documentation of item characteristics, (3) test-retest analyses of items with adequate qualitative and quantitative properties, (4) analysis of cross-ratings from multiple raters for items with adequate retest reliability, (5) aggregation of ratings across diverse samples to evaluate generalizability across populations, (6) evaluations of predictive utility in various contexts. We hope these recommendations are the first step in a collaborative effort to identify a comprehensive pool of personality nuances at the lowest level, enabling subsequent construction of a robust hierarchy – from the bottom up.

Published
2020

8. Descriptive, Predictive and Explanatory Personality Research: Different Goals, Different Approaches, but a Shared Need to Move Beyond the Big Few Traits

Author

Mottus, R, Wood, D, Condon, D, Back, M, Baumert, A, Costantini, G, Epskamp, S, Greiff, S, Johnson, W, Lukaszewski, A, Murray, A, Revelle, W, Wright, A, Yarkoni, T, Ziegler, M, Zimmermann, J, Mottus R., Wood D., Condon D. M., Back M. D., Baumert A., Costantini G., Epskamp S., Greiff S., Johnson W., Lukaszewski A., Murray A., Revelle W., Wright A. G. C., Yarkoni T., Ziegler M., Zimmermann J., Mottus, R, Wood, D, Condon, D, Back, M, Baumert, A, Costantini, G, Epskamp, S, Greiff, S, Johnson, W, Lukaszewski, A, Murray, A, Revelle, W, Wright, A, Yarkoni, T, Ziegler, M, Zimmermann, J, Mottus R., Wood D., Condon D. M., Back M. D., Baumert A., Costantini G., Epskamp S., Greiff S., Johnson W., Lukaszewski A., Murray A., Revelle W., Wright A. G. C., Yarkoni T., Ziegler M., and Zimmermann J.

Abstract

We argue that it is useful to distinguish between three key goals of personality science—description, prediction and explanation—and that attaining them often requires different priorities and methodological approaches. We put forward specific recommendations such as publishing findings with minimum a priori aggregation and exploring the limits of predictive models without being constrained by parsimony and intuitiveness but instead maximizing out-of-sample predictive accuracy. We argue that naturally occurring variance in many decontextualized and multidetermined constructs that interest personality scientists may not have individual causes, at least as this term is generally understood and in ways that are human-interpretable, never mind intervenable. If so, useful explanations are narratives that summarize many pieces of descriptive findings rather than models that target individual cause–effect associations. By meticulously studying specific and contextualized behaviours, thoughts, feelings and goals, however, individual causes of variance may ultimately be identifiable, although such causal explanations will likely be far more complex, phenomenon-specific and person-specific than anticipated thus far. Progress in all three areas—description, prediction and explanation—requires higher dimensional models than the currently dominant ‘Big Few’ and supplementing subjective trait-ratings with alternative sources of information such as informant-reports and behavioural measurements. Developing a new generation of psychometric tools thus provides many immediate research opportunities. © 2020 European Association of Personality Psychology.

Published
2020

9. The foot-health and mortality of adult patients with diabetes in regional Australia: findings from an epidemiological study with two-year follow-up

Author

Perrin, Byron, Allen, P, Condon, D, Chappell, A, Massey, C, Gardner, Marcus, Phillips, B, Skinner, I, and Skinner, T

Subjects
Uncategorized
Abstract

There is limited epidemiological research that reports on the foot-health of people with diabetes within Australian regional settings. The objective of this two-year cohort study was to explore the incidence of diabetes-related foot morbidity and mortality in people residing in regional Australia.There is limited epidemiological research that reports on the foot-health of people with diabetes within Australian regional settings. The objective of this two-year cohort study was to explore the incidence of diabetes-related foot morbidity and mortality in people residing in regional Australia.

Published
2021
Full Text
View/download PDF

12. The foot-health and mortality of adult patients with diabetes in Northern Tasmania: findings from an epidemiological study with two-year follow-up

Author

Perrin, Byron, Allen, P, Condon, D, Chappell, A, Massey, C, Gardner, Marcus, Phillips, B, Skinner, I, and Skinner, T

Subjects
Uncategorized
Abstract

BackgroundThere is limited epidemiological research that reports on the foot-health of people with diabetes within Australian regional settings.The objective of this two-year follow-up analysis was to explore inci-dent diabetes-related foot morbidity and mortality in people residingin Northern Tasmania.MethodsAdults with diabetes were recruited from predominately community-based, publicly-funded podiatric services in regional Tasmania. Theprimary variable of interest was the incidence of foot ulceration,lower limb amputation and death. Other variables of interest wereage, sex, rurality, socio-economic disadvantage, diabetes type andduration, knowledge of diabetes and smoking status. The main out-come was incidence of foot morbidity (foot ulceration, lower limbamputation or death) per 100 person-years. A survival analysis wasconducted to determine median time to each morbidity outcome.ResultsThere were 445 Tasmanian patients (264 males and 181 females)who completed baseline assessments. Mean age at baseline was 65(SD 12.9, range 19-97). Sixty-two (13.9%) participants had type I dia-betes and 383 (86.1%) had type II. Three hundred and fifty-three(79.3%) participants had at least one follow-up visit, with 285 (64.0%)participants still being followed-up at 12 months, 248 (55.7%) at 18months and 203 (45.6%) at 24 months. Median number of follow-upvisits = 10 (IQR 4, 22, range 1, 98). There were 57 deaths (12.8%).There were 157 (35.3%) new ulcers during the study period and 24(5.4%) new amputations. Risk factors for worsening foot morbidityover time and the results of the survival analysis will also bepresented.ConclusionsPublic podiatric services in regional Tasmania are managing patientsat significant risk of serious diabetes-related foot morbidity. The two-year incidence of ulceration and amputation is high, and the propor-tion of participants who died after two years is an important findingin the Australian context. Patients presenting to these regional publicpodiatry services require multi-disciplinary health care in accordancewith national and international guidelines. There is a potential dispar-ity between current funding models for these services and the levelof diabetes-related foot morbidity the services are managing.

Published
2019
Full Text
View/download PDF

15. The Priabonian GSSP: a golden spike to drive

Author

Agnini, C., Backman, J., Boscolo-Galazzo, F., Condon, D., Fornaciari, E., Galeotti, S., Giusberti, L., Grandesso, P., Lanci, L., Luciani, V., Monechi, S., Muttoni, G., Pälike, H., Pampaloni, M. L., Papazzoni, C. A., Pignatti, J., Premoli Silva, I., Raffi, I., Rio, D., Rook, L., Sahy, D., Spofforth, D. J. A., and Stefani, C.

Subjects
GSSP, Priabonian, chronostratigraphy, Paleogene
Published
2019

16. Discovery of an Extensive Deep-Sea Fossil Serpulid Reef Associated With a Cold Seep, Santa Monica Basin, California

Author

Georgieva, M, Paull, CK, Little, CTS, McGann, M, Sahy, D, Condon, D, Lundsten, L, Pewsey, J, Caress, DW, Vrijenhoek, RC, Georgieva, M, Paull, CK, Little, CTS, McGann, M, Sahy, D, Condon, D, Lundsten, L, Pewsey, J, Caress, DW, and Vrijenhoek, RC

Abstract

Multibeam bathymetric mapping of the Santa Monica Basin in the eastern Pacific has revealed the existence of a number of elevated bathymetric features, or mounds, harboring cold seep communities. During 2013–2014, mounds at ∼600 m water depth were observed for the first time and sampled by Monterey Bay Aquarium Research Institute’s ROV Doc Ricketts. Active cold seeps were found, but surprisingly one of these mounds was characterized by massive deposits composed of fossil serpulid worm tubes (Annelida: Serpulidae) exhibiting various states of mineralization by authigenic carbonate. No living serpulids with equivalent tube morphologies were found at the site; hence the mound was termed “Fossil Hill.” In the present study, the identity of the fossil serpulids and associated fossil community, the ages of fossils and authigenic carbonates, the formation of the fossil serpulid aggregation, and the geological structure of the mound are explored. Results indicate that the tubes were most likely made by a deep-sea serpulid lineage, with radiocarbon dating suggesting that they have a very recent origin during the Late Pleistocene, specifically to the Last Glacial Maximum ∼20,000 years ago. Additional U-Th analyses of authigenic carbonates mostly corroborate the radiocarbon dates, and also indicate that seepage was occurring while the tubes were being formed. We also document similar, older deposits along the approximate trajectory of the San Pedro Basin Fault. We suggest that the serpulid tube facies formed in situ, and that the vast aggregation of these tubes at Fossil Hill is likely due to a combination of optimal physical environmental conditions and chemosynthetic production, which may have been particularly intense as a result of sea-level lowstand during the Last Glacial Maximum.

Published
2019

17. Ichnological evidence for meiofaunal bilaterians from the Ediacaran and earliest Cambrian of Brazil

Author

Parry, L, Boggiani, PC, Condon, D, Garwood, R, Leme, J, McIlrory, D, Brasier, MD, Campanha, GAC, Pacheco, AF, Diniz, CQC, Liu, AG, Liu, Alexander [0000-0002-3985-982X], and Apollo - University of Cambridge Repository

Subjects
Palaeontology, Palaeoecology
Abstract

The evolutionary events during the Ediacaran–Cambrian transition (~541 Ma) are unparalleled in Earth history. The fossil record suggests that most extant animal phyla appeared in a geologically brief interval, with the oldest unequivocal bilaterian body fossils found in early Cambrian. Molecular clocks and biomarkers provide independent estimates for the timing of animal origins, and both suggest a cryptic Neoproterozoic history for Metazoa that extends considerably beyond the Cambrian fossil record. We report an assemblage of ichnofossils from Ediacaran–Cambrian siltstones in Brazil, alongside U-Pb radioisotopic dates that constrain the age of the oldest specimens to 555–542 Ma. X-ray microtomography reveals three-dimensionally preserved traces ranging from 50–600μm in diameter, indicative of small-bodied, meiofaunal tracemakers. Burrow morphologies suggest they were created by a nematoid-like organism that utilised undulating locomotion to move through the sediment. This assemblage demonstrates animal-sediment interactions in the latest Ediacaran Period, and provides the oldest known fossil evidence for meiofaunal bilaterians. Our discovery highlights meiofaunal ichnofossils as a hitherto unexplored window for tracking animal evolution in deep time, and reveals that both meiofaunal and macrofaunal bilaterians began to explore infaunal niches during the late Ediacaran., Field costs for L.A.P. were supported by an undergraduate travel grant from St. Anne’s College, University of Oxford. Fieldwork costs for M.D.B. were supported by CNPq-Conselho Nacional Desenvolvimento Científico e Tecnológico- Brazil (Proc. 451245/2012-1). This project was supported by an NERC Isotope Geoscience Facilities Steering Committee grant (project IP-1560-0515). J.M.L., P.C.B., R.T., G.A.C.C., C.Q.C.D. and M.L.A.F.P. were supported by grant numbers 2009/02312-4, 2010/02677-0, 2013/17835-8 and 2016-06114-6, São Paulo Research Foundation (FAPESP), Brazil. A.G.L. and L.A.P. are supported by the Natural Environment Research Council (grant numbers NE/L011409/2 and NE/L501554/1, respectively). R.J.G. is a Scientific Associate at the Natural History Museum, London, and a member of the Interdisciplinary Centre for Ancient Life (UMRI). D.M. recognizes the support of an NSERC discovery grant.

Published
2017

22. Pacific 187Os/188Os isotope chemistry and U-Pb geochronology : synchroneity of global Os isotope change across OAE 2

Author

Du Vivier, A. D. C., Selby, D., Condon, D. J., Takashima, R., and Nishi, H.

Subjects
Late cretaceous, Palaeocirculation, Oceanic Anoxic Event 2, U–Pb geochronology, Global framework
Abstract

Studies of OAE 2 sections beyond the Atlantic Ocean, Western Interior Seaway (WIS) and European pelagic shelf are limited. Here, we present initial osmium isotope stratigraphy (187Os/188Os–Osi) from two proto-Pacific sites that span the Cenomanian–Turonian boundary interval (CTBI): the Yezo Group (YG) section, Hokkaido, Japan, and the Great Valley Sequence (GVS), California, USA; to evaluate the 187Os/188Os seawater chemistry of the proto-Pacific. Additionally we combine new 206Pb/238U zircon CA-ID-TIMS geochronology from five volcanic tuff horizons of the Yezo Group section to test and facilitate inter-basinal integration with the WIS using radio-isotopically constrained age–depth models for both sections, and quantitatively constrain the absolute timing and duration of events across the CTBI. The YG shows an almost identical Osi profile to that of the WIS, and very similar to that of other sites of the proto-Atlantic and European pelagic oceans (Turgeon and Creaser, 2008 and Du Vivier et al., 2014). The characteristics of the Osi profile are radiogenic and heterogeneous (∼0.55–0.85) prior to the OAE 2, and synchronous with the inferred OAE 2 onset the Osi abruptly become unradiogenic and remain relatively homogeneous (∼0.20–0.30) before showing a gradual return to more radiogenic View the MathML source throughout the middle to late OAE 2. A206Pb/238U zircon age of an interbedded tuff (HK017) in the adjacent horizon to the first unradiogenic Osi value constrains the age of the Osi inflection at 94.44±0.14 Ma. This age, including uncertainty, agrees with the interpolated age of the same point in the Osi profile (94.28±0.25 Ma) in the only other dated OAE 2 section, the WIS; indicating a coeval shift in seawater chemistry associated with volcanism at the OAE 2 onset at the levels of temporal resolution (ca. 0.1 Myr). Further, prior to the onset of OAE 2 an enhanced radiogenic inflection in the Osi profile of the YG is correlative, within uncertainty, with a similar trend in the WIS based on the U–Pb age–depth model. The interpolated ages, 94.78±0.12 Ma and 94.66±0.25 Ma for this Osi inflection in the YG and WIS, respectively, indicate that palaeocirculation was sufficient to simultaneously influence transbasinal seawater chemistry. In contrast, the pre-OAE 2 Osi profile for the GVS is disparate to that of the YG and those of the proto-Atlantic and European pelagic shelf locations. We interpret the pre OAE 2 heterogeneous Osi values (0.30–0.95) to record a palaeobasin that was regionally influenced interchangeably by both unradiogenic (hydrothermal flux) and radiogenic (continental flux) Os. We conclude that the Osi profiles from the proto-Pacific sections record both trends that are consistent globally (OAE 2 onset, syn and post OAE 2), but also show regional differences (pre OAE 2) between OAE 2 sections worldwide. As such the Osi profiles coupled with U–Pb geochronology facilitate the correlation of OAE 2 stratigraphy, and demonstrate both regional and global ocean dynamics.

Published
2015
Full Text
View/download PDF

23. LGC-1: A zircon reference material for in-situ (U-Th)/He dating

Author

Tian, Y., Vermeesch, P., Danisik, Martin, Condon, D., Chen, W., Kohn, B., Schwanethal, J., Rittner, M., Tian, Y., Vermeesch, P., Danisik, Martin, Condon, D., Chen, W., Kohn, B., Schwanethal, J., and Rittner, M.

Abstract

A pairwise in-situ (U-Th)/He dating method has been proposed for mitigating matrix-related bias in U and Th measurements using synthetic reference materials. This method requires a natural zircon reference material whose (U-Th)/He age should be homogeneous on the scale (~10-100µm) to be used in such dating experiments. A newly characterized zircon LGC-1 megacryst fulfils this requirement. This pale-yellowish, flawless Sri Lanka gem specimen is about 1.2*0.8*0.8cm in size. Optical microscopy, cathodoluminescence-imaging, X-ray elemental mapping, and Raman spectroscopy on a large number of random shards did not reveal any detectable textural and compositional heterogeneity. Laser ablation inductively-coupled plasma mass spectrometry (LA-ICP-MS) analyses on a large number of randomly selected fragments yield 266 measurements of U, Th and Pb concentrations, which are within the corresponding experimental uncertainties. The weighted mean U, Th and Pb concentrations are 357.7±1.8ppm, 740.9±5.0ppm, and 39.06±0.18ppm, respectively, with a weighted mean Th/U ratio of 2.07±0.01, indistinguishable from Isotope Dilution ICP-MS (ID-ICP-MS) and Thermal Ionization Mass Spectrometry (ID-TIMS) results. ID-TIMS U/Pb ages are concordant within uncertainties of decay constants, with a concordia age of 541.70±0.70Ma. Conventional (U-Th)/He dating on 28 random shards from the crystal in different laboratories gives a central age of 476.4±5.7Ma. Six in-situ (U-Th)/He analyses yield consistent 4He concentrations and ages with weighted mean values of 1248±46nmol/g and 462±21Ma, respectively. Fractions of this zircon have been shared with several laboratories in the Australia, China, UK and US, and are expected to serve as a reference for both in-situ and conventional (U-Th)/He analyses. The combination of analytical methods used to characterize LGC-1 zircon may be used as a template for future age reference calibration.

Published
2017

24. Open Peer Commentary and Authors' Response

Author

Asendorpf, J. B., Daniel Balliet, Righetti, F., Blackie, L. E. R., Jayawickreme, E., Blum, G. S., Schmitt, M., Donnellan, M. B., Corker, K. S., Dunlop, W. L., Egloff, B., Hirschmüller, S., Krohn, J., Fleeson, W., Gallardo-Pujol, D., Buades-Rotger, M., Johnson, J. A., Johnson, W., Krueger, J. I., Mccrae, R. R., Mõttus, R., Allerhand, M., Mroczek, D. K., Condon, D. M., Nave, C. S., Neyer, F. J., Mund, M., Zimmermann, J., Noftle, E. E., Gust, C. J., Perugini, M., Constantini, G., Pincus, A. L., Hopwood, C. J., Wright, A. G. C., Saucier, G., Conley, M., Schönbrodt, F. D., Hagemeyer, B., Paul Van Lange, Vazire, S., Bleidorn, W., Wilt, J. A., Revelle, W., Wrzus, C., Ziegler, M., Ziegler, J., Rauthmann, J. F., Sherman, R. A., Funder, D. C., Social & Organizational Psychology, Social Psychology, and Amsterdam Global Change Institute

Published
2015

26. Project Report: Grinding Through the Ediacaran-Cambrian Transition.

Author

ROSE, C. V., PRAVE, A. R., BERGMANN, K. D., CONDON, D. J., KASEMANN, S. A., MACDONALD, F. A., HOFFMANN, K.-H., TRINDADE, R. I. F., and ZHU, M.

Subjects
EDIACARAN fossils, CARBON cycle, RODINIA (Supercontinent), EARTH'S orbit, GEOLOGICAL surveys
Abstract

The Neoproterozoic Era (1000 - 541 Ma) was one of the most dramatic in Earth history: metazoans evolved, the supercontinent Rodinia formed and broke apart, the global carbon cycle underwent high-amplitude fluctuations, oxygen concentrations rose and climate experienced at least two episodes of worldwide glaciation. However, the discontinuous and fragmented nature of outcropbased studies has hindered developing quantitative models of Earth system functioning during that Era. The Geological Research through Integrated Neoproterozoic Drilling (GRIND) project will begin to rectify this scientific shortcoming by obtaining 13 cores, each between 150 to 600 m in length, through the archetype successions that record the environmental and biogeochemical context during which animals evolved. The specific targets are the Ediacaran-Cambrian transition (ECT; c. 560-530 Ma) strata of west Brazil (Corumbá Group), south China (Doushantuo, Dengying and equivalent formations) and south Namibia (Nama Group). Our objective is to create a core network of correlative ECT strata that will enable the construction of a high resolution, temporally constrained geobiological, stratigraphic and geochemical database, as well as to provide a legacy archive for future research. The goal is to understand the drivers of the Neoproterozoic Earth system revolution: it began with simple eukaryotes that populated Earth during the preceding billion years of the Mesoproterozoic, underwent multiple Snowball Earth events and emerged with the oxygenated, diverse ecosystems of the Cambrian. The excellent outcrops of the Nama Group in Namibia are central to the success of the GRIND project, as is the invaluable expertise and support of the Geological Survey of Namibia. The stratigraphy of these rocks is well-documented and is an archetype of the late Ediacaran to early Cambrian. Furthermore, the presence of abundant ash beds offers excellent opportunities for obtaining high-precision U-Pb geochronology, making the Nama Group an ideal target for acquiring precise temporally constrained and detailed geobiological and geochemical data to meet our research goals. [ABSTRACT FROM AUTHOR]

Published
2019

27. Mochras borehole revisited: a new global standard for Early Jurassic earth history

Author

Hesselbo, S.P., Bjerum, C.J., Hinnov, L.A., MacNiocaill, C., Miller, K.G., Riding, J.B., van de Schootbrugge, B., Abels, H.A., Belcher, C., Blau, J., Browning, J., Cartwright, J., Condon, D., Daines, S., Damborenea, S., Dickson, A., Fraguas, A., Hilgen, F., Hooker, J., Huang, C., Hüsing, S., Jenkyns, H., Korte, C., Krijgsman, W., Lenton, T., Little, C., Manceñido, M., Mattioli, E., Meister, C., Morgan, R., Newton, R., Pálfy, J., Pienkowski, G., Poulton, S., Riccardi, A., Robinson, A., Ruhl, M., Suan, G., Smith, N., Thibault, N., Ullmann, C., Wignall, P., Williford, K., Wonik, T., Xu, W., Marine Palynology, NWO-VENI: Middle Miocene global cooling: climate change through gateway closure, NWO-VENI: Terrestrial climate change and river floodplain dynamics during extreme greenhouse conditions in the Early Eocene, NWO-VICI: The evolution of the Paratethys: the lost sea of Central Eurasia, Paleomagnetism, Stratigraphy & paleontology, Marine palynology and palaeoceanography, Stratigraphy and paleontology, Marine Palynology, NWO-VENI: Middle Miocene global cooling: climate change through gateway closure, NWO-VENI: Terrestrial climate change and river floodplain dynamics during extreme greenhouse conditions in the Early Eocene, NWO-VICI: The evolution of the Paratethys: the lost sea of Central Eurasia, Paleomagnetism, Stratigraphy & paleontology, Marine palynology and palaeoceanography, and Stratigraphy and paleontology

Subjects
Total organic carbon, Extinction event, Series (stratigraphy), Environmental change, Mechanical Engineering, Earth science, lcsh:QE1-996.5, Oceanografía, Hidrología, Recursos Hídricos, Borehole, Energy Engineering and Power Technology, Biota, STRATIGRAPHY, EARLY JURASSIC, BOREHOLE, Ciencias de la Tierra y relacionadas con el Medio Ambiente, lcsh:Geology, purl.org/becyt/ford/1 [https], purl.org/becyt/ford/1.5 [https], Paleontology, Stratigraphy, DRILLING, Glacial period, Geology, CIENCIAS NATURALES Y EXACTAS, GLOBAL STANDARD
Abstract

The Early Jurassic epoch was a time of extreme environmental change: there are well-documented examples of rapid transitions from cold, or even glacial, climates to super greenhouse events, the latter characterized worldwide by hugely enhanced organic carbon burial, multiple large isotopic anomalies, global sea-level change, and mass extinction (Price, 1999; Hesselbo et al., 2000; Jenkyns, 2010; Korte and Hesselbo, 2011). These icehouse–greenhouse events not only reflect changes in the global climate system but are also thought to have had significant influence on the evolution of Jurassic marine biota (e.g. van de Schootbrugge et al., 2005; Fraguas et al., 2012). Furthermore, the events may serve as analogues for present-day and future environmental transitions. Although our knowledge of specific global change events within the Early Jurassic is rapidly improving, such as the Toarcian oceanic anoxic event (or T-OAE), we still do not have a comprehensive understanding of the timing, pacing, or triggers for these environmental perturbations, principally because of the temporally fragmentary nature of the existing data sets. The major goal for this proposed ICDP project is therefore to produce a new global standard for these key 25 million years of earth history by re-drilling and doublecoring a 45 yr old borehole at Mochras Farm on the edge of Cardigan Bay, Wales, and developing an integrated stratigraphy for the cored material. The new data sets will be applied to understand fundamental questions about the longand short-term evolution of the earth system. Cycles that occur regionally and that provisionally appear in the Mochras logs will allow evaluation of the extent to which major environmental change events are astronomically forced, resulting from internal system dynamics, or are triggered by deepearth processes. Fil: Hesselbo, S. P.. University Of Exeter; Reino Unido Fil: Bjerrum, C. J.. Universidad de Copenhagen; Dinamarca Fil: Hinnov, L. A.. University Johns Hopkins; Estados Unidos Fil: Mac Niocaill, C.. University of Oxford; Reino Unido Fil: Miller, K. G.. State University of New Jersey; Estados Unidos Fil: Riding, J. B.. British Geological Survey; Reino Unido Fil: Van de Schootbrugge, B.. University of Utrecht; Países Bajos Fil: Abels, H.. The Mochras Revisited Science Team; Reino Unido Fil: Belcher, C.. The Mochras Revisited Science Team; Reino Unido Fil: Blau, J.. The Mochras Revisited Science Team; Reino Unido Fil: Browning, J.. The Mochras Revisited Science Team; Reino Unido Fil: Cartwright, J.. The Mochras Revisited Science Team; Reino Unido Fil: Condon, D.. The Mochras Revisited Science Team; Reino Unido Fil: Daines, S.. The Mochras Revisited Science Team; Reino Unido Fil: Damborenea, S.. The Mochras Revisited Science Team; Reino Unido Fil: Dickson, A.. The Mochras Revisited Science Team; Reino Unido Fil: Fraguas, A.. The Mochras Revisited Science Team; Reino Unido Fil: Hilgen, F.. The Mochras Revisited Science Team; Reino Unido Fil: Hooker, J.. The Mochras Revisited Science Team; Reino Unido Fil: Huang, C.. The Mochras Revisited Science Team; Reino Unido Fil: Huesing, S.. The Mochras Revisited Science Team; Reino Unido Fil: Jenkyns, H.. The Mochras Revisited Science Team; Reino Unido Fil: Korte, C.. The Mochras Revisited Science Team; Reino Unido Fil: Krijgsman, W.. The Mochras Revisited Science Team; Reino Unido Fil: Lenton, T.. The Mochras Revisited Science Team; Reino Unido Fil: Little, C.. The Mochras Revisited Science Team; Reino Unido Fil: Manceñido, Miguel Oscar. The Mochras Revisited Science Team; Reino Unido. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Fil: Mattioli, E.. The Mochras Revisited Science Team; Reino Unido Fil: Meister, C.. The Mochras Revisited Science Team; Reino Unido Fil: Morgan, R.. The Mochras Revisited Science Team; Reino Unido Fil: Newton, R.. The Mochras Revisited Science Team; Reino Unido Fil: Pálfy, J.. The Mochras Revisited Science Team; Reino Unido Fil: Pienkowski, G.. The Mochras Revisited Science Team; Reino Unido Fil: Poulton, S.. The Mochras Revisited Science Team; Reino Unido Fil: Riccardi, A.. The Mochras Revisited Science Team; Reino Unido Fil: Robinson, A.. The Mochras Revisited Science Team; Reino Unido Fil: Ruhl, M.. The Mochras Revisited Science Team; Reino Unido Fil: Suan, G.. The Mochras Revisited Science Team; Reino Unido Fil: Smith, N.. The Mochras Revisited Science Team; Reino Unido Fil: Thibault, N.. The Mochras Revisited Science Team; Reino Unido Fil: Ullmann, C.. The Mochras Revisited Science Team; Reino Unido Fil: Wignall, P.. The Mochras Revisited Science Team; Reino Unido Fil: Williford, K.. The Mochras Revisited Science Team; Reino Unido Fil: Wonik, T.. The Mochras Revisited Science Team; Reino Unido Fil: Xu, W.. The Mochras Revisited Science Team; Reino Unido

Published
2013
Full Text
View/download PDF

29. GTSnext : towards a next generation of the geological time scale over the last 100 millions years

Author

Kuiper, K., Condon, D., Hilgen, F., Lascar, J., Mezger, K., Palike, H., Quidelleur, X., Schaltegger, U., Sprovieri, M., Storey, M., Wijbrans, J.R., Max-Planck-Institut für Chemie (MPIC), Max-Planck-Gesellschaft, Institut für Mineralogie, Zentrallabor für Geochronologie, Westfälische Wilhelms-Universität Münster (WWU), Interactions et dynamique des environnements de surface (IDES), Université Paris-Sud - Paris 11 (UP11)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Department of Mineralogy, and University of Geneva [Switzerland]

Subjects
[SDU.STU]Sciences of the Universe [physics]/Earth Sciences, ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2009

33. Mochras borehole revisited: A new global standard for Early Jurassic Earth history

Author

Marine Palynology, NWO-VENI: Middle Miocene global cooling: climate change through gateway closure, NWO-VENI: Terrestrial climate change and river floodplain dynamics during extreme greenhouse conditions in the Early Eocene, NWO-VICI: The evolution of the Paratethys: the lost sea of Central Eurasia, Paleomagnetism, Stratigraphy & paleontology, Marine palynology and palaeoceanography, Stratigraphy and paleontology, Hesselbo, S.P., Bjerum, C.J., Hinnov, L.A., MacNiocaill, C., Miller, K.G., Riding, J.B., van de Schootbrugge, B., Abels, H.A., Belcher, C., Blau, J., Browning, J., Cartwright, J., Condon, D., Daines, S., Damborenea, S., Dickson, A., Fraguas, A., Hilgen, F., Hooker, J., Huang, C., Hüsing, S., Jenkyns, H., Korte, C., Krijgsman, W., Lenton, T., Little, C., Manceñido, M., Mattioli, E., Meister, C., Morgan, R., Newton, R., Pálfy, J., Pienkowski, G., Poulton, S., Riccardi, A., Robinson, A., Ruhl, M., Suan, G., Smith, N., Thibault, N., Ullmann, C., Wignall, P., Williford, K., Wonik, T., Xu, W., Marine Palynology, NWO-VENI: Middle Miocene global cooling: climate change through gateway closure, NWO-VENI: Terrestrial climate change and river floodplain dynamics during extreme greenhouse conditions in the Early Eocene, NWO-VICI: The evolution of the Paratethys: the lost sea of Central Eurasia, Paleomagnetism, Stratigraphy & paleontology, Marine palynology and palaeoceanography, Stratigraphy and paleontology, Hesselbo, S.P., Bjerum, C.J., Hinnov, L.A., MacNiocaill, C., Miller, K.G., Riding, J.B., van de Schootbrugge, B., Abels, H.A., Belcher, C., Blau, J., Browning, J., Cartwright, J., Condon, D., Daines, S., Damborenea, S., Dickson, A., Fraguas, A., Hilgen, F., Hooker, J., Huang, C., Hüsing, S., Jenkyns, H., Korte, C., Krijgsman, W., Lenton, T., Little, C., Manceñido, M., Mattioli, E., Meister, C., Morgan, R., Newton, R., Pálfy, J., Pienkowski, G., Poulton, S., Riccardi, A., Robinson, A., Ruhl, M., Suan, G., Smith, N., Thibault, N., Ullmann, C., Wignall, P., Williford, K., Wonik, T., and Xu, W.

Published
2013

34. NERC science : future impacts summary report

Author

Chambers, J., Goodenough, K.M., Graham, C.C., Price, S.J., Weatherby, A., Sanders, R., Perry, F., Porter, L., Bloomfield, J.P., Jordan, C.J., Laxton, J.L., Shelley, W.A., Naden, J., Watts, M., Condon, D., Barkwith, A.K.A.P., Chambers, J., Goodenough, K.M., Graham, C.C., Price, S.J., Weatherby, A., Sanders, R., Perry, F., Porter, L., Bloomfield, J.P., Jordan, C.J., Laxton, J.L., Shelley, W.A., Naden, J., Watts, M., Condon, D., and Barkwith, A.K.A.P.

Abstract

This report outlines the main outcomes from the NERC Science: Future impacts event held in March 2013 at Regent’s Park College, London. The meeting was convened by a cross-centre group to examine future social, technological, economic, environmental and political trends over the next 20 years that will drive the need for science research. By undertaking a series of horizon scanning activities, two questions were explored;  What key shifts in natural environment research focus are needed to ensure socioeconomic impact in 20 years time?  What do we need to do as a family of institutions to ensure we are fit for purpose in delivering natural environment research outcomes with socio-economic impact? The activities during the day were based around six themes for which environmental science research is required to deliver solutions to future challenges. The six themes were:  Energy and mineral resources  Food and water resources  Urbanisation and land use  Biodiversity  Natural hazards  New technologies The likely drivers and challenges for research within each theme were identified through a series of facilitated horizon scanning activities. Common emerging trends and challenges were then recognised. The overarching themes that were identified included enhanced public engagement, sustainable delivery of ecosystem services and natural capital (including sustainable resource exploitation), urbanisation and population growth, vulnerability of people to hazards and characterisation of offshore and extraterrestrial environments. In addressing the question of how to ensure that NERC is ‘fit-for-purpose’ in delivering longterm impact, four critical issues emerged during the discussions. First, clear mechanisms and incentives are required to support and promote multi-disciplinary research. Resolution of the future environmental challenges will require work across scientific, social and economic research areas. The second and third issues are closely linked, and relate to

Published
2013

35. Leishmania majorinhibits IL-12 in macrophages by signalling through CR3 (CD11b/CD18) and down-regulation of ETS-mediated transcription

Author

Ricardo-Carter, C., primary, Favila, M., additional, Polando, R. E., additional, Cotton, R. N., additional, Bogard Horner, K., additional, Condon, D., additional, Ballhorn, W., additional, Whitcomb, J. P., additional, Yadav, M., additional, Geister, R. L., additional, Schorey, J. S., additional, and McDowell, M. A., additional

Published
2013
Full Text
View/download PDF

41. U-Pb (zircon) age constraints on the timing and duration of Wenlock (Silurian) paleocommunity collapse and recovery during the "Big Crisis"

Author

Cramer, B. D., primary, Condon, D. J., additional, Soderlund, U., additional, Marshall, C., additional, Worton, G. J., additional, Thomas, A. T., additional, Calner, M., additional, Ray, D. C., additional, Perrier, V., additional, Boomer, I., additional, Patchett, P. J., additional, and Jeppsson, L., additional

Published
2012
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results