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Presents a reply to the comment given by I. Brookes to the article "Late Wisconsinan stratigraphy and chronology of southern St. George's Bay, Newfoundland: a re-appraisal," by Trevor Bell, David G.E. Liverman, Martin J. Batterson and Kevin Sheppard, which appeared in the 2001 issue of the 'Canadian Journal of Earth Sciences." Disagreements in field observations and interpretations; Discussion of a complex sedimentary sequences of interbedded diamicton, gravel and mud above the basal till; Discounting the significance of a date given to a diamicton at Highlands.

Copyright of Canadian Journal of Forest Research is the property of Canadian Science Publishing and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Canadian Journal of Earth Sciences is the property of Canadian Science Publishing and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Canadian Journal of Fisheries & Aquatic Sciences is the property of Canadian Science Publishing and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Canadian Journal of Earth Sciences is the property of Canadian Science Publishing and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Canadian Journal of Earth Sciences is the property of Canadian Science Publishing and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Deals with a study which documented the development of comparable shallow-marine facies in the terminal Arenig of Avalon from eastern Newfoundland to southern New England. Limestone lithology; Faunas; Discussion; Systematic paleontology; Discussion.

Presents a study that examined the distribution and foraging behavior of northern waterthrushes in recently harvested and intact landscapes of Newfoundland. Method of the study; Results and discussion; Conclusion.

The "communication-failure" hypothesis states that individuals whose agonistic displays deviate from the population norm are selected against because of the greater likelihood of their becoming involved in escalated contests. A corollary of this hypothesis is that the level of aggression in dyadic (pairwise) contests over resources is predicted to be higher the greater the behavioural divergence between the two contestants. Display divergence between two contestants from different populations should exceed that in intrapopulation dyads, consequently this prediction can be tested by comparing levels of aggression in contests between interpopulation dyads with those in contests between intrapopulation dyads. We carried out such a test using brook trout (Salvelinus fontinalis) from two isolated populations in eastern Newfoundland. In initial encounters, the nipping rate (a measure of aggressiveness) of individuals from one of these populations was significantly higher in interpopulation dyads than in intrapopulation dyads. These results are consistent with the communication-failure hypothesis, as well as with the view that behavioural assessment, using low-cost stereotypic displays, reduces the cost of interactions over resources for both contestants. [ABSTRACT FROM AUTHOR]

The Taconian Humber Zone stretches from western Newfoundland to southern Quebec. The Early Cambrian slope succession in Newfoundland is found in the Curling Group, whereas in Quebec, various units were deposited during that first time slice. Biostratigraphic data allow correlation of the Curling Group with the Labrador Group in Newfoundland and with the newly time-constrained slope succession in Quebec. The end of the rift drift transition is marked by a sea-level lowstand at the end of the Early Cambrian. The Middle Cambrian to latest Early Ordovician passive margin history recorded five cyclic sea-level fluctuations. Three of these cycles are recorded in the shallow-marine Middle to Late Cambrian platform (Port au Port Group) and slope sediments preserved in the Cow Head and Northern Head groups in Newfoundland. The biostratigraphic information assists correlation with Cambrian passive margin units in Quebec. Major sea-level lowstands are recognized along the continental margin in early-middle Late Cambrian (Steptoan) and in late Late Cambrian (Sunwaptan). Even if the Quebec succession can be tied with its Newfoundland correlative, some significant differences in the nature of Upper Cambrian slope conglomerates argue for a tectonic control on the depth of erosion of the Cambrian continental margin. The Lower Ordovician record of the passive margin consists of two depositional cycles (Tremadocian-Arenigian) separated by a sea-level lowstand. This last event is well expressed in platform succession and is also recognized in conglomerate units found in the slope succession. [ABSTRACT FROM AUTHOR]

Geochronological studies on the timing of deformation and metamorphism along the Laurentian margin have shown that the ages of metamorphic events change along-strike within the Newfoundland southern Quebec segment of the Canadian Appalachians. The Gaspé Peninsula is located at mid-point of the two extremities of this segment. New single-grain laser [sup40]Ar/[sup39]Ar plateau ages solely reflect latest Middle Late Ordovician metamorphism. Samples taken within the internal Humber zone in the Shickshock Group rocks yield [sup40]Ar/[sup39]Ar muscovite and hornblende ages ranging from 457 to 454 Ma. Samples from the Amphibolite du Diable, the metamorphic sole of the Mont Albert ophiolite, yield [sup40]Ar/[sup39]Ar muscovite and hornblende ages ranging from 459 to 457 Ma. Ordovician ages of the internal Humber zone are consistent with [sup40]Ar/[sup39]Ar ages from southern Quebec and arc interpreted as the result of the emplacement onto the margin of both the ophiolitc and its metamorphic sole. [ABSTRACT FROM AUTHOR]

In the Humber Arm area of the western Newfoundland Appalachians, four distinct stratigraphic successions derived from the Laurentian continental margin are exposed. Each succession is believed to be characteristic of a separate thrust sheet. The platform sheet represents the ancient Laurentian shell and its foreland basin cover; the Watsons Brook sheet is characterized by a succession including shelf-margin carbonates overlying foreland basin clastics; the Corner Brook sheet comprises continental slope and rise clastic and carbonate sedimentary rocks of the Humber Arm Supergroup; and the Woods Island sheet includes clastics of the Blow Me Down Brook formation that overlie mafic volcanics. Sheets are subdivided by thrusts into tectonic slices. Disrupted units and mélange, with scaly S[sub1] foliation, are found along the boundaries of some slices. Thrust sheets and related structures have been deformed by F[sub2] folds with axial planar S[sub2] cleavage. S[sub1] scaly foliations are transposed into parallelism with S[sub2]. There is a transition in the style of F[sub2] folds across the area, from upright and subhorizontal in the west to overturned folds with west-dipping axial planes and steeply raking or reclined fold hinges in the cast. Strongly curved fold hinges may reflect later shearing along the S[sub2] surfaces, producing sheath-like fold geometries. Shear zones close to the cast edge of the outcrop of the Watsons Brook sheet display kinematic indicators indicating both D[sub2] reverse-sense and D[sub3] normal-sense dip-slip shears. Subsequent events produced L[sub4] and L[sub5] crenulation lineations on the S[sub2] surfaces. At minimum, several tens of kilometres of shortening affected the part of the margin preserved in the Humber Arm area; true shortening and... [ABSTRACT FROM AUTHOR]

Examines the habitat selection and demography of woodland carbou population in Newfoundland. Effect of interaction among human-induced habitat selection; Impact of black bear predation; Pregnancy and recruitment rates; Potential causes of mortality.

The Sops Head Complex of Badger Bay, central Newfoundland, includes olistostromal and tectonized mélanges and marks the Red Indian Line, the boundary between the peri-Gondwanan Exploits and peri-Laurentian Notre Dame subzones of the oceanic Dunnage Zone. Basalts in the olistostromal mélange preserve peperitic contacts with mudstone and limestone within slumped sedimentary units, demonstrating that magmatism was coeval with olistostrome formation. Conodonts from the limestones date these events as late Darriwilian ("Llandeilian," Middle Ordovician) in age. The conodont fauna consists entirely of North Atlantic Faunal Realm elements, suggesting a peri-Gondwanan or mid-Iapetan provenance for limestone of the Sops Head Complex. Basalt geochemistry suggests magmatism in a mature volcanic-arc to back-arc setting. The Sops Head Complex shows similarities in age, provenance, and stratigraphic setting to the Dunnage Mélange, suggesting that the two units are correlative.Le complexe de Sops Head de la baie de Badger, au centre de Terre-Neuve, comprend des mélanges d'olistostromes tectonisés et marque la ligne Red Indian, la limite entre les sous-zones péri-Gondwana Exploits et péri-Laurentienne Notre Dame de la zone océanique de Dunnage. Les basaltes dans le mélange d'olistostromes conservent les contacts pépéritques avec le mudstone et le calcaire à l'intérieur des unités sédimentaires affaissées, démontrant ainsi que le magmatisme était contemporain de la formation de l'olistostrome. Selon des datations sur des Conodontes dans le calcaire, ces événements dateraient du Darriwillien tardif (« Llandeilien », Ordovicien moyen). La faune de Conodontes est entièrement composée d'éléments du domaine faunique de l'Atlantique Nord suggérant que le calcaire du complexe de Sops Head provienne du péri-Gondwana ou de l'Iapetus central. La géochimie des basaltes suggère du magmatisme dans un environnement mature d'arc volcanique à arrière-arc. Le complexe de Sops Head démontre des similitudes d'âge, de provenance et d'environnement de déposition avec le mélange de Dunnage, suggérant une corrélation entre les deux unités.[Traduit par la Rédaction] [ABSTRACT FROM AUTHOR]

Examines the patterns of home-range size and habitat selection of American marten in southeastern Labrador, a region of extensive and pristine forests. Availability of habitat types with their use; Variation in home-range size at two scales; Association between marten and dense-canopy coniferous forests.

Examines the use of multiple abundance estimators to infer population trends in Altantic Puffins in Gull Island, Newfoundland. Estimation of breeding population; Utilization of closed-population estimator with sighting heterogeneity; Projection of age-based matrix using literature values.

We report amphibole and mica [sup 40] Ar/[sup 39] Ar ages from the Makkovik Province. Amphibole ages from metamorphic rocks decrease towards the interior of the province, indicating a first-order pattern of monotonic cooling with progressive migration of the province into a more distal back-arc location. The amphibole data, in combination with muscovite ages, reveal a second-order pattern consisting of four stages corresponding to changing spatial and temporal configurations of plutonism and deformation. (1) The western Kaipokok domain cooled through muscovite closure by 1810 Ma, long after the cessation of arc magmatism. (2) The Kaipokok Bay shear zone, bounding the Kaipokok and Aillik domains, cooled through amphibole closure during 1805–1780 Ma, synchronous with emplacement of syn-tectonic granitoid plutons. (3) Between 1740 and 1700 Ma, greenschist-facies shearing occurred along the boundary between the Kaipokok domain and Nain Province synchronous with A-type plutonism and localized shearing in the western Kaipokok domain, cooling to muscovite closure temperatures in the Kaipokok Bay shear zone, and A-type plutonism and amphibole closure or resetting in the Aillik domain. (4) In the period 1650–1640 Ma, muscovite ages, an amphibole age from a shear zone, and resetting of plutonic amphibole indicate a thermal effect coinciding in part with Labradorian plutonism in the Aillik domain. Amphibole ages from dioritic sheets in the juvenile Aillik domain suggest emplacement between 1715 and 1685 Ma. Amphibole ages constrain crystallization of small mafic plutons in the Kaipokok domain (reworked Archean foreland) to be no younger than 1670–1660 Ma. These ages are the oldest yet obtained for Labradorian plutonism in the Makkovik Province.Nous signalons des âges [sup 40] Ar/[sup 39] Ar sur des amphiboles et des micas de la province de Makkovik. Les âges des amphiboles des roches métamorphiques décroissent vers l'intérieur de la province, indiquant un patron de premier ordre de refroidissement monotonique accompagné d'une migration progressive de la province vers un emplacement plus distal d'arrière arc. Les données sur les amphiboles, combinées aux âges sur la muscovite, révèlent un patron de second ordre comprenant quatre stages correspondant aux configurations changeantes du plutonisme et de la déformation dans le temps et l'espace. (1) Le domaine Kaipokok occidental a refroidi durant la fermeture de la muscovite avant 1810 Ma, longtemps après la cession du magmatisme d'arc. (2) La zone de cisaillement de Kaipokok Bay, limitant les domaines de Kaipokok et d'Aillik, a refroidi durant la fermeture de l'amphibole au cours de la période 1805–1780 Ma, ce qui est synchrone avec la mise en place de plutons granitoïdes syn-tectoniques. (3) Entre 1740 et 1700 Ma, du cisaillement au faciès des schistes verts a eu lieu le long de la limite entre le domaine de Kaipokok et la province de Nain, en même temps que du plutonisme de type A et du cisaillement localisé dans le domaine de Kaipokok occidental, refroidissant aux températures de fermeture de la muscovite dans la zone de cisaillement de Kaipokok Bay ainsi que du plutonisme de type A et la fermeture de l'amphibole ou une remise en place dans le domaine d'Aillik. (4) Au cours de la période 1650–1640 Ma, les âges de la muscovite, un âge provenant d'une amphibole d'une zone de cisaillement et la remise en place d'une amphibole plutonique indiquent un effet thermique coïncidant en partie avec le plutonisme labradorien dans le domaine d'Aillik. Des âges d'amphiboles provenant de couches dioritiques dans le jeune domaine d'Aillik suggèrent une mise en place entre 1715 et 1685 Ma. Les âges des amphiboles contraignent la cristallisation de petits plutons mafiques dans le domaine de Kaipokok (avant-pays archéen retravaillé) à ne pas être plus jeunes que 1670–1660 Ma. Ces âges sont les plus anciens obtenus à ce jour pour le plutonisme labradorien dans la province de Makkovik.[Traduit par la Rédaction] [ABSTRACT FROM AUTHOR]

The Makkovik Province is a segment of a Paleoproterozoic accretionary belt (the Makkovik–Ketilidian orogen) that developed on the southern margin of Laurentia at 1.9–1.7 Ga. In contrast to coeval Laurentian orogenic belts that mainly resulted from collision of Archean plates, Makkovikian–Ketilidian orogenesis was dominated by active-margin processes including continental margin arc plutonism and juvenile terrane accretion, both of which were accompanied by regional transpression. In the Makkovik Province, earliest deformation and amphibolite-facies metamorphism of Paleoproterozoic rift–drift assemblages (Post Hill and Moran Lake groups) and the Archean foreland (Nain Province) occurred at 1.9 Ga in response to accretion of a Paleoproterozoic island arc. Following this collision, cratonward-dipping subduction was established, resulting in the formation of the 1895–1870 Ma Island Harbour Bay Plutonic Suite, a calc-alkaline magmatic arc built on reworked Archean crust. Crust formation continued between ca. 1860 and 1850 Ma with deposition of the Aillik Group on a largely juvenile basement in a rifted-arc or back-arc setting. Sometime before 1802 Ma this depositional basin was tectonically inverted, with resultant northwestward thrusting of the Aillik Group over reworked Archean crust. This phase of deformation may have been driven by accretion of a second island arc potentially represented by the Cape Harrison Metamorphic Suite. Regional transpression and amphibolite-facies metamorphism at ca. 1815–1780 Ma were accompanied by widespread granitoid plutonism. These events were mainly concentrated in the juvenile domains and are thought to reflect processes in a broad continental back-arc setting. A final orogenic pulse, marked by regional greenschist-facies transpression and emplacement of A-type granitoid plutons, occurred between 1740 and 1700 Ma, with deformation and plutonism potentially linked to crust–mantle detachment and incursion of mafic magmas at the base of the crust, respectively. The record of crustal development suggests that the coeval themes of spatially and temporally linked structural and plutonic activity, oceanward migration of this activity over time, and a trend toward increasingly more localized deformation occurred throughout the orogenic history of the Makkovik Province. These characteristics are thought to broadly reflect oceanward crustal growth of the orogen over time. In the correlative Ketilidian mobile belt of southern Greenland, these themes were also operative but appear to have been less pronounced, most likely due to minimal or a complete absence of accretion of island-arc material.La Province de Makkovik est un segment d'une ceinture d'accrétion paléoprotérozoïque (l'orogène Makkovik–kétilidien) qui s'est développée sur la bordure sud de la Laurentia vers 1,9–1,7 Ga. Contrairement aux ceintures orogéniques contemporaines laurentiennes qui résultent principalement de la collision de plaques archéennes, l'orogène Makkovik–kétilidien a été dominé par des processus de marges actives, incluant du plutonisme d'arc de marge continentale et l'accrétion de terranes juvéniles, les deux événements étant accompagnés d'une transpression régionale. Dans la Province de Makkovik, la déformation la plus ancienne et le métamorphisme au faciès des amphibolites des assemblages paléoprotérozoïques à divergence et dérive (les groupes de Post Hill et de Moran Lake) et l'avant-pays archéen (la Province de Nain) ont eu lieu vers 1,9 Ga en réponse à l'accrétion d'un arc insulaire paléoprotérozoïque. À la suite de cette collision, une subduction à pendage vers le craton a été établie, ce qui a eu comme résultat de former la suite plutonique de Island Harbour Bay (1895–1870 Ma), un arc magmatique calco-alcalin édifié sur une croûte archéenne retravaillée. La formation de la croûte s'est poursuivie entre environ 1860 et 1850 Ma avec la déposition du Groupe d'Aillik sur un socle largement juvénile dans un environnement d'arc de divergence ou d'arrière-arc. Quelque temps avant 1802 Ma, ce bassin de déposition a été tectoniquement inversé, causant le chevauchement du Groupe d'Aillik, vers le nord-ouest, par-dessus la croûte archéenne retravaillée. Cette phase de déformation peut avoir été imposée par l'accrétion d'un second arc insulaire potentiellement représenté par la suite métamorphique de Cape Harrison. La transpression régionale et le métamorphisme au faciès des amphibolites vers 1815–1780 Ma ont été accompagnés de plutonisme granitoïde étendu. Ces événements ont surtout été concentrés dans les domaines juvéniles et on croit qu'ils reflètent les processus dans un grand environnement continental d'arrière-arc. Une poussée orogénique finale, marquée par de la transpression régionale au faciès de schistes verts et la mise en place de plutons granitoïdes de type A a eu lieu entre 1740 et 1700 Ma, avec la déformation et le plutonisme potentiellement reliés au détachement de la croûte du manteau et à l'incursion de magmas mafiques à la base de la croûte respectivement. L'enregistrement du développement crustal suggère que les thèmes contemporains, reliés dans le temps et l'espace, d'activité structurale et plutonique, la migration de cette activité vers l'océan, avec le temps, et une tendance vers de la déformation de plus en plus localisée aient eu lieu tout au cours de l'histoire de la Province de Makkovik. On croit que ces caractéristiques sont le reflet général de la croissance de la croûte de l'orogène avec le temps. Dans la ceinture mobile corrélative kétilidienne du sud du Groenland, ces thèmes étaient aussi actifs, mais semblaient moins prononcés, probablement en raison d'une accrétion minimale de matériel d'arc insulaire ou même de son absence complète.[Traduit par la Rédaction] [ABSTRACT FROM AUTHOR]

The Aillik domain of the Makkovik Province is dominated by deformed and metamorphosed sedimentary and bimodal volcanic rocks of the redefined Aillik Group and abundant unfoliated late- to post-orogenic plutonic rocks. Mapping and petrological studies in the Makkovik Bay area of the Aillik domain showed that the upper part of the group, in addition to felsic volcanic rocks, also includes extensive areas of hypabyssal, foliated granitic rocks (Measles Point Granite). Although petrochemically similar to the spatially associated felsic volcanic rocks, a new U–Pb (zircon) age of 1929 Ma suggests that the Measles Point Granite may be about 70 million years older than the volcanic rocks of the Aillik Group, based on published U–Pb dates for the latter unit. The volcanic and granitic rocks show similar structural and metamorphic history, and both have characteristics of crust-derived A-type felsic rocks, although the granite shows less chemical variation than the felsic volcanic rocks. A within-plate setting is postulated, although the associated mafic metavolcanic rocks and amphibolite dykes show evidence of a volcanic-arc influence. Possible solutions of the paradox presented by the U–Pb ages imply that the Measles Point Granite either represents the juvenile basement to the Aillik Group or was derived from a basement with a large juvenile component. The setting for deposition of the Aillik Group that is consistent with current tectonic models for the Makkovik Province is a rifted arc built on a juvenile terrane accreted to Archean crust.Le domaine d'Aillik de la Province de Makkovik est dominé par des roches sédimentaires et volcaniques bimodales déformées et métamorphosées du Groupe d'Aillik redéfini et d'abondantes roches plutoniques non feuilletées post-orogéniques tardives. De la cartographie et des études pétrologiques dans la région de la baie de Makkovik du domaine d'Aillik montrent que la partie supérieure de ce groupe comprend, en plus de roches felsiques volcaniques, de grandes plages de roches granitiques foliées et hypabyssales (granite de Measles Point). Bien que pétrochimiquement semblables aux roches volcaniques felsiques qui lui sont associées dans l'espace, un nouvel âge U–Pb (zircon) de 1929 Ma suggère que le granite de Measles Point soit environ 70 millions d'années plus âgé que les roches volcaniques du Groupe d'Aillik, selon des dates U–Pb publiées pour cette dernière unité. Les roches volcaniques et granitiques montrent un historique structural et métamorphique similaire et les deux présentent des caractéristiques de roches felsiques de type A dérivées de la croûte, bien que le granite montre moins de variation chimique que les roches volcaniques felsiques. On propose un environnement à l'intérieur d'une plaque, bien que les roches métavolcaniques mafiques et les dykes d'amphibolite associés montrent des évidences d'une influence d'arc volcanique. Des solutions possibles au paradoxe présenté par les âges U–Pb impliquent que le granite de Measles Point représente le socle juvénile du Groupe d'Aillik ou qu'il provient d'un socle ayant une grande composante juvénile. L'environnement de déposition pour le Groupe d'Aillik qui concorde avec des modèles tectoniques actuels pour la Province de Makkovik est un arc divergent édifié sur un terrane juvénile accrété à la croûte archéenne.[Traduit par la Rédaction] [ABSTRACT FROM AUTHOR]