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27 results on '"Hargraves, R.B."'

7. Magnetic properties experiments on the Mars Pathfinder lander: preliminary results

Author

Hviid, S.F., Madsen, M.B., Gunnlaugsson, H.P., Goetz, W., Knudsen, J.M., Hargraves, R.B., Smith, P., Britt, D., Dinesen, A.R., Mogensen, C.T., Olsen, M., Pedersen, C.T., and Vistisen, L.

Subjects
Mars Pathfinder (Space probe) -- Research, Planets -- Natural history -- Research, Mars (Planet) -- Natural history -- Research, Science and technology
Abstract

Many of the particles currently suspended in the martian atmosphere are magnetic, with an average saturation magnetization of about 4 A [multiplied by] [m.sup.2]/kg (amperes times square meters per kilogram). [...]

Published
1997

8. Shatter cones and shocked rocks in southwestern Montana: the Beaverhead impact structure

Author

Hargraves, R.B., Cullicott, C.E., Deffeyes, K.S., Hougen, S., Christiansen, P.P., and Fiske, P.S.

Subjects
Montana -- Natural history, Geology, Stratigraphic -- Proterozoic, Sedimentary structures -- Research, Geological research -- Montana, Rocks, Sedimentary -- Research, Earth sciences
Abstract

Shatter cones that point steeply upward are present in abundance over an are >100 [km.sup.2] in Belt Supergroup sandstone outcrops in Beaverhead County, southwestern Montana. Crushed sandstone with fragments dispersed in a fluidal textured, cryptocrystalline matrix of similar chemical composition has also been found. Absence of cones in adjacent units of Mississippian and younger age suggests a late Precambrian-early Paleozoic age for the formation of this newly discovered impact structure, only a small part of which is preserved in the complexly faulted terrain.

Published
1990

10. Magnetic enhancement on the surface of Mars ?

Author

Hargraves, R.B., Knudsen, Jens Martin, Bertelsen, Preben, Goetz, Walter, Gunnlaugsson, Haraldur Pall, Hviid, S.F., Madsen, M.B., Olsen, M., Hargraves, R.B., Knudsen, Jens Martin, Bertelsen, Preben, Goetz, Walter, Gunnlaugsson, Haraldur Pall, Hviid, S.F., Madsen, M.B., and Olsen, M.

Abstract

Mars, Planetfysik, Magnetiske jordarter

Published
2000

11. Multispectral and Compositional Properties of Martian Soil and Dust: Preliminary Results from Mars Pathfinder

Author

Bell III, J.F., McSween Jr., H.Y., Murchie, S.L., Johnson, J.R., Reid, R., Morris, R.V., Anderson, R.C., Bishop, J.L., Bridges, N.T., Britt, D.T., Crisp, J.A., Economou, T., Ghosh, A., Greenwood, J.P., Gunnlaugsson, Haraldur Pall, Hargraves, R.B., Hviid, S.F., Knudsen, Jens Martin, Madsen, M.B., Moore, H.J., Rieder, R., Soderblom, L., Bell III, J.F., McSween Jr., H.Y., Murchie, S.L., Johnson, J.R., Reid, R., Morris, R.V., Anderson, R.C., Bishop, J.L., Bridges, N.T., Britt, D.T., Crisp, J.A., Economou, T., Ghosh, A., Greenwood, J.P., Gunnlaugsson, Haraldur Pall, Hargraves, R.B., Hviid, S.F., Knudsen, Jens Martin, Madsen, M.B., Moore, H.J., Rieder, R., and Soderblom, L.

Published
2000

13. Overview of the Mars Pathfinder Mission: Launch Through Landing, Surface Operations, Data Sets, and Science Results

Author

Golombek, M.P., Anderson, R.C., Barnes, Jacob Roland, Bell III, J.F., Bridges, N.T., Britt, D.T., Brückner, J., Cook, R.A., Crisp, D., Crisp, J., Economou, T., Folkner, W.M., Greeley, R., Haberle, R.M., Hargraves, R.B., Harris, J.A., Haldemann, A.F.C., Hviid, S.F., Jaumann, R., Johnson, J.R., Herkenhoff, K.E., Kallemeyn, P. H.ry W., Keller, H.U., Kirk, R.L., Knudsen, Jens Martin, Larsen, S., Lemmon, M., Madsen, M.B., Magelhäes, J.A., Manning, R.M., Maki, J.N., Malin, M.C., Matijevic, J., McSween Jr., H.Y., Moore, H.J., Murchie, S.L., Murphy, J.R., Parker, T.J., Rieder, R., Schofield, J.T., Seiff, A., Singer, R.B., Smith, P.H., Soderblom, L.A., Spencer, D.A., Stoker, C., Sullivan, R.P., Thomas, N., Thurman, S.W., Tomasko, M.G., Vaughan, R.M., Wänke, H., Ward, W., Wilson, G., Golombek, M.P., Anderson, R.C., Barnes, Jacob Roland, Bell III, J.F., Bridges, N.T., Britt, D.T., Brückner, J., Cook, R.A., Crisp, D., Crisp, J., Economou, T., Folkner, W.M., Greeley, R., Haberle, R.M., Hargraves, R.B., Harris, J.A., Haldemann, A.F.C., Hviid, S.F., Jaumann, R., Johnson, J.R., Herkenhoff, K.E., Kallemeyn, P. H.ry W., Keller, H.U., Kirk, R.L., Knudsen, Jens Martin, Larsen, S., Lemmon, M., Madsen, M.B., Magelhäes, J.A., Manning, R.M., Maki, J.N., Malin, M.C., Matijevic, J., McSween Jr., H.Y., Moore, H.J., Murchie, S.L., Murphy, J.R., Parker, T.J., Rieder, R., Schofield, J.T., Seiff, A., Singer, R.B., Smith, P.H., Soderblom, L.A., Spencer, D.A., Stoker, C., Sullivan, R.P., Thomas, N., Thurman, S.W., Tomasko, M.G., Vaughan, R.M., Wänke, H., Ward, W., and Wilson, G.

Published
1998

14. The Magnetic Properties Experiments on Mars Pathfinder

Author

Madsen, M.B., Hviid, S.F., Gunnlaugsson, Haraldur Pall, Goetz, W., Pedersen, C.T., Dinesen, A.R., Olsen, M., Vistisen, L., Hargraves, R.B., Knudsen, Jens Martin, Madsen, M.B., Hviid, S.F., Gunnlaugsson, Haraldur Pall, Goetz, W., Pedersen, C.T., Dinesen, A.R., Olsen, M., Vistisen, L., Hargraves, R.B., and Knudsen, Jens Martin

Published
1998

18. Palaeomagnetism and magnetic fabric in the Freetown Complex, Sierra Leone.

Author

Hargraves, R.B., Briden, J.C., and Daniels, B.A.

Subjects
*PALEOMAGNETISM, *MAGNETIC cores
Abstract

Investigates the paleomagnetism and magnetic fabric in the Freetown Complex in Sierra Leone. Discovery of separately oriented cores; Details of the alternating field and thermal demagnetization; Difference between the Freetown pole and other mid-Jurassic poles from West Africa.

Published
1999
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19. Palaeomagnetism of the Karoo igneous rocks in southern Africa.

Author

Hargraves, R.B. and Rehacek, J.

Subjects
IGNEOUS rocks, PALEOMAGNETISM
Abstract

Reports on the two complementary paleomagnetic studies of the Karoo igneous rocks in South Africa. Previous paleomagnetic works on the rocks; Age of Karoo magmatism; Paleomagnetic sampling and measurements of the rocks; Structural corrections applied to the data; Compilation of the magnetic stratigraphy of the rocks.

Published
1997

20. Palaeomagnetic results from the Timbavati Gabbros in the...

Author

Hargraves, R.B. and Hattingh, P.J.

Subjects
IGNEOUS intrusions
Abstract

Presents the palaeomagnetic results from the Timbavati Gabbros situated in the northeastern part of South Africa. Distinct petrological variety of basic intrusions of the Timbavati Gabbros; How the remament magnetization was measured; Results of the tests; Account on the magnetization directions from the sites.

Published
1994

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