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46 results on '"Wilhelms, Don E."'

1. The Geology of Pluto and Charon Through the Eyes of New Horizons

Author

Moore, Jeffrey M., McKinnon, William B., Spencer, John R., Howard, Alan D., Schenk, Paul M., Beyer, Ross A., Nimmo, Francis, Singer, Kelsi N., Umurhan, Orkan M., White, Oliver L., Stern, S. Alan, Ennico, Kimberly, Olkin, Cathy B., Weaver, Harold A., Young, Leslie A., Binzel, Richard P., Buie, Marc W., Buratti, Bonnie J., Cheng, Andrew F., Cruikshank, Dale P., Grundy, Will M., Linscott, Ivan R., Reitsema, Harold J., Reuter, Dennis C., Showalter, Mark R., Bray, Veronica J., Chavez, Carrie L., Howett, Carly J. A., Lauer, Tod R., Lisse, Carey M., Parker, Alex Harrison, Porter, S. B., Robbins, Simon J., Runyon, Kirby, Stryk, Ted, Throop, Henry B., Tsang, Constantine C. C., Verbiscer, Anne J., Zangari, Amanda M., Chaikin, Andrew L., and Wilhelms, Don E.

Subjects
Astrophysics - Earth and Planetary Astrophysics
Abstract

NASA's New Horizons spacecraft has revealed the complex geology of Pluto and Charon. Pluto's encounter hemisphere shows ongoing surface geological activity centered on a vast basin containing a thick layer of volatile ices that appears to be involved in convection and advection, with a crater retention age no greater than $\approx$10 Ma. Surrounding terrains show active glacial flow, apparent transport and rotation of large buoyant water-ice crustal blocks, and pitting, likely by sublimation erosion and/or collapse. More enigmatic features include tall mounds with central depressions that are conceivably cryovolcanic, and ridges with complex bladed textures. Pluto also has ancient cratered terrains up to ~4 Ga old that are extensionally fractured and extensively mantled and perhaps eroded by glacial or other processes. Charon does not appear to be currently active, but experienced major extensional tectonism and resurfacing (probably cryovolcanic) nearly 4 billion years ago. Impact crater populations on Pluto and Charon are not consistent with the steepest proposed impactor size-frequency distributions proposed for the Kuiper belt.

Published
2016
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2. Geologic Map of the Wilhelm Quadrangle of the Moon.

Author

Saunders, R. S., U.S. Geological Survey, and Wilhelms, Don E.

Subjects
Moon, Geology
Abstract

Image is courtesy of the online Geologic Atlas of the Moon maintained by the Lunar and Planetary Institute, This atlas is a series of colored loose maps published over several years. Pub Date is based on the most recent sheet in the initial 1,000,000 set. Library has 34 of the paper sheets. 10 images of the remaining sheets are taken from the online Geologic Atlas of the Moon maintained by the Lunar and Planetary Institute, To view this map as part of a composite of all 44 maps in this series, see it in Google Earth (requires Google Earth download) https://rumseypublic.s3.amazonaws.com/Moon_Geology_1972.kmz

Published
1974

5. Geologic Map of the Taruntius Quadrangle of the Moon. MAP I - 722 (LAC-61).

Author

Wilhelms, Don E. and U.S. Geological Survey

Subjects
Moon, Geology
Abstract

This atlas is a series of colored loose maps published over several years. Pub Date is based on the most recent sheet in the initial 1,000,000 set. Library has 34 of the paper sheets. 10 images of the remaining sheets are taken from the online Geologic Atlas of the Moon maintained by the Lunar and Planetary Institute, To view this map as part of a composite of all 44 maps in this series, see it in Google Earth (requires Google Earth download) https://rumseypublic.s3.amazonaws.com/Moon_Geology_1972.kmz

Published
1972

6. (Covers to) Geologic Map of the Taruntius Quadrangle of the Moon. MAP I - 722 (LAC-61).

Author

Wilhelms, Don E. and U.S. Geological Survey

Subjects
Washington D.C.
Abstract

Manila kraft paper slip envelope with identifying text and simple index map., This atlas is a series of colored loose maps published over several years. Pub Date is based on the most recent sheet in the initial 1,000,000 set. Library has 34 of the paper sheets. 10 images of the remaining sheets are taken from the online Geologic Atlas of the Moon maintained by the Lunar and Planetary Institute, To view this map as part of a composite of all 44 maps in this series, see it in Google Earth (requires Google Earth download) https://rumseypublic.s3.amazonaws.com/Moon_Geology_1972.kmz

Published
1972

7. (Covers to) Geologic Map of the Mare Vaporum Quadrangle of the Moon. MAP I - 548 (LAC 59).

Author

Wilhelms, Don E. and U.S. Geological Survey

Subjects
Washington D.C.
Abstract

Manila kraft paper slip envelope with identifying text and simple index map., This atlas is a series of colored loose maps published over several years. Pub Date is based on the most recent sheet in the initial 1,000,000 set. Library has 34 of the paper sheets. 10 images of the remaining sheets are taken from the online Geologic Atlas of the Moon maintained by the Lunar and Planetary Institute, To view this map as part of a composite of all 44 maps in this series, see it in Google Earth (requires Google Earth download) https://rumseypublic.s3.amazonaws.com/Moon_Geology_1972.kmz

Published
1968

8. Geologic Map of the Mare Vaporum Quadrangle of the Moon. MAP I - 548 (LAC 59).

Author

Wilhelms, Don E. and U.S. Geological Survey

Subjects
Moon, Geology
Abstract

This atlas is a series of colored loose maps published over several years. Pub Date is based on the most recent sheet in the initial 1,000,000 set. Library has 34 of the paper sheets. 10 images of the remaining sheets are taken from the online Geologic Atlas of the Moon maintained by the Lunar and Planetary Institute, To view this map as part of a composite of all 44 maps in this series, see it in Google Earth (requires Google Earth download) https://rumseypublic.s3.amazonaws.com/Moon_Geology_1972.kmz

Published
1968

9. Geologic Map of Julius Caesar Quadrangle of the Moon. MAP I - 510 (LAC-60).

Author

Morris, Elliot C., U.S. Geological Survey, and Wilhelms, Don E.

Subjects
Moon, Geology
Abstract

This atlas is a series of colored loose maps published over several years. Pub Date is based on the most recent sheet in the initial 1,000,000 set. Library has 34 of the paper sheets. 10 images of the remaining sheets are taken from the online Geologic Atlas of the Moon maintained by the Lunar and Planetary Institute, To view this map as part of a composite of all 44 maps in this series, see it in Google Earth (requires Google Earth download) https://rumseypublic.s3.amazonaws.com/Moon_Geology_1972.kmz

Published
1967

10. (Covers to) Geologic Map of Julius Caesar Quadrangle of the Moon. MAP I - 510 (LAC-60).

Author

Morris, Elliot C., U.S. Geological Survey, and Wilhelms, Don E.

Subjects
Washington D.C.
Abstract

Manila kraft paper slip envelope with identifying text and simple index map., This atlas is a series of colored loose maps published over several years. Pub Date is based on the most recent sheet in the initial 1,000,000 set. Library has 34 of the paper sheets. 10 images of the remaining sheets are taken from the online Geologic Atlas of the Moon maintained by the Lunar and Planetary Institute, To view this map as part of a composite of all 44 maps in this series, see it in Google Earth (requires Google Earth download) https://rumseypublic.s3.amazonaws.com/Moon_Geology_1972.kmz

Published
1967

11. PLANETARY SCIENCE: The geology of Pluto and Charon through the eyes of New Horizons

Author

Moore, Jeffrey M., McKinnon, William B., Spencer, John R., Howard, Alan D., Schenk, Paul M., Beyer, Ross A., Nimmo, Francis, Singer, Kelsi N., Umurhan, Orkan M., White, Oliver L., Stern, Alan S., Ennico, Kimberly, Olkin, Cathy B., Weaver, Harold A., Young, Leslie A., Binzel, Richard P., Buie, Marc W., Buratti, Bonnie J., Cheng, Andrew F., Cruikshank, Dale P., Grundy, Will M., Linscott, Ivan R., Reitsema, Harold J., Reuter, Dennis C., Showalter, Mark R., Bray, Veronica J., Chavez, Carrie L., Howett, Carly J.A., Lauer, Tod R., Lisse, Carey M., Parker, Alex Harrison, Porter, S. B., Robbins, Stuart J., Runyon, Kirby, Stryk, Ted, Throop, Henry B., Tsang, Constantine C.C., Verbiscer, Anne J., Zangari, Amanda M., Chaikin, Andrew L., Wilhelms, Don E., and Science Team, New Horizons

Published
2016
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13. Hellas as a possible site of ancient ice-covered lakes on Mars

Author

Moore, Jeffrey M. and Wilhelms, Don E.

Subjects
Mars (Planet) -- Research, Lakes -- Discovery and exploration, Astronomy, Earth sciences
Abstract

Based on topographic, morphologic, and stratigraphic evidence, we propose that ancient water-laid sediment is the dominant component of deposits within Hellas Planitia, Mars. Multiple-layered sediment is manifested by alternating benches and scarps visible in Mars orbiting camera narrow-angle (MOC NA) images. Viking Orbiter camera and MOC NA images were used to map contacts and stratigraphically order the different materials units within Hellas. Mars orbiting laser altimeter (MOLA) data reveal that the contacts of these sedimentary units, as well as a number of scarps or other abrupt changes in landscape texture, trace contours of constant elevation for thousands of km, and in one case all around the basin. Channels, consensually interpreted to be cut by water, lead into the basin. MOLA results indicate that the area encompassed by greater Hellas' highest closed contour is nearly one-fifth that of the entire northern plains, making the Hellas 'drainage' area much larger than previously reported. If lakes formed under climatic conditions similar to the modern Martian climate, they would develop thick ice carapaces, then the lakes would eventually sublimate away. Two units within Hellas exhibit a reticulate or honeycomb pattern, which we speculate are impressions made by lake-lowered ice blocks grounding into initially soft mud.

Published
2001

14. Hellas as a Possible Site of Ancient Ice-Covered Lakes on Mars

Author

Moore, Jeffrey M, Wilhelms, Don E, and DeVincenzi, Donald

Subjects
Lunar And Planetary Science And Exploration
Abstract

Based on topographic, morphologic, and stratigraphic evidence, we propose that ancient water-laid sediment is the dominant component of deposits within Hellas Planitia, Mars. Multiply layered sediment is manifested by alternating benches and scarps visible in Mars Orbiting Camera narrow-angle (MOC NA) images. Viking Orbiter camera and MOC NA images were used to map contacts and stratigraphically order the different materials units within Hellas. Mar's Orbiting Laser Altimeter (MOLA) data reveal that the contacts of these sedimentary units, as well as a number of scarps or other abrupt changes in landscape texture, trace contours of constant elevation for thousands of km, and in one case all around the basin. Channels, consensually interpreted to be cut by water, lead into the basin. MOLA results indicate that the area encompassed by greater Hellas' highest closed contour is nearly one-fifth that of the entire northern plains, making the Hellas 'drainage' area much larger than previously reported. If lakes formed under climatic conditions similar to the modern Martian climate, they would develop thick ice carapaces, then the lakes would eventually sublimate away. Two units within Hellas exhibit a reticulate or honeycomb pattern we speculate are impressions made by lake-lowered ice blocks grounding into initially soft mud.

Published
2002

16. To a rocky moon - A geologist's history of lunar exploration

Author

Wilhelms, Don E

Subjects
Lunar And Planetary Exploration
Abstract

A detailed historical account is given of lunar exploration by a scientist who had been involved in the field before and after, as well as during, the period of the Apollo moon landings. Attention is given to the ways in which the initial, robotic lunar-probe landings added crucially to the store of knowledge on which planning for the manned landings relied, and the process by which lunar science became increasingly geological. The six successful manned landings and their scientific determinations are discussed.

Published
1993

19. Large-scale volcano-ground ice interactions on Mars

Author

Squyres, Steven W, Wilhelms, Don E, and Moosman, Ann C

Subjects
Lunar And Planetary Exploration
Abstract

In the present investigation of Martian volcano-ground ice interaction processes, a numerical model is developed that encompasses conductive heat transport, surface radiation, heat transfer to the atmosphere, and H2O phase-changes in an ice-rich permafrost over which lave flows erupt, followed by the intrusion of sills. An examination is made of the two large scale interaction regions formed near Aeolis Mensae and near the volcano Hadriaca Patera, northeast of Hellas. The inferred channel discharges are compared to discharge rates calculated for lava-ground ice interactions, showing that meltwater (probably accumulated under the surface) was rapidly released at a discharge rate that was limited by soil permeability. The volcano-ground ice interactions have been an important Martian geologic process, and could account for the palagonites constituting the Martian dust.

Published
1987
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22. Geologic mapping

Author

Greeley, Ronald, Batson, Raymond M., Wilhelms, Don E., Greeley, Ronald, Batson, Raymond M., and Wilhelms, Don E.

Published
1990

29. Map I-824: Geologic map of the Wilhelm quadrangle of the Moon: Geologic Atlas of the Moon

Author

Saunders, Ronald Stephen and Wilhelms, Don E. and Saunders, Ronald Stephen and Wilhelms, Don E.

Abstract

USGS Miscellaneous Investigations Series no. I-824 (LAC-111). Prepared by the U.S. Geological Survey in cooperation with the National Aeronautics and Space Administration and the USAF Aeronautical Chart and Information Center. Includes index map, text, and bibliographical references. Located in the Lloyd Reeds Map Collection, call no. G 3196.C5 1962 MC75P.

Published
1974

30. Map I-837: Geologic map of the Mare Undarum quadrangle of the Moon: Geologic Atlas of the Moon

Author

Olson, Annabel B. and Wilhelms, Don E. and Olson, Annabel B. and Wilhelms, Don E.

Abstract

USGS Miscellaneous Investigations Series no. I-837 (LAC-62). Prepared by the U.S. Geological Survey in cooperation with the National Aeronautics and Space Administration and the USAF Aeronautical Chart and Information Center. Includes cross section, index map, text and bibliographical references. Located in the Lloyd Reeds Map Collection, call no. G 3196.C5 1962 MC75P.

Published
1974

31. Map I-948: Geologic map of the east side of the Moon: Geologic Atlas of the Moon

Author

Wilhelms, Don E. and El-Baz, Farouk and Wilhelms, Don E. and El-Baz, Farouk

Abstract

USGS Miscellaneous Investigations Series no. I-948. Prepared by the U.S. Geological Survey in cooperation with the National Aeronautics and Space Administration and the Defense Mapping Agency. Includes index map, text and bibliographical references. Located in the Lloyd Reeds Map Collection, call no. G 3196.C5 1962 MC75P.

Published
1977

32. Map I-703: Geologic map of the near side of the Moon: Geologic Atlas of the Moon

Author

Wilhelms, Don E. and McCauley, John F. and Wilhelms, Don E. and McCauley, John F.

Abstract

USGS Miscellaneous Investigations Series no. I-703. Prepared by the U.S. Geological Survey in cooperation with the National Aeronautics and Space Administration and the USAF Aeronautical Chart and Information Center. Includes index map, text and bibliographical references. Located in the Lloyd Reeds Map Collection, call no. G 3196.C5 1962 MC75P.

Published
1971

33. Map I-722: Geologic map of the Taruntius quadrangle of the Moon: Geologic Atlas of the Moon

Author

Wilhelms, Don E. and Wilhelms, Don E.

Abstract

USGS Miscellaneous Investigations Series no. I-722 (LAC-61). Prepared by the U.S. Geological Survey in cooperation with the National Aeronautics and Space Administration and the USAF Aeronautical Chart and Information Center. Includes index map, text and bibliographical references. Located in the Lloyd Reeds Map Collection, call no. G 3196.C5 1962 MC75P.

Published
1972

34. Map I-617: Geologic map of Apollo landing site 1, part of Maskelyne DA region southeastern Mare Tranquillitatis: Geologic Atlas of the Moon

Author

Wilhelms, Don E. and Wilhelms, Don E.

Abstract

USGS Miscellaneous Investigations Series no. I-617 [ORB II-2 (25)]. Prepared in cooperation with the Manned Spacecraft Center, National Aeronautics and Space Administration. Department of the Interior. Accompanying text entitled, "Geologic maps of early Apollo landing sites," by N.J. Trask. Located in the Lloyd Reeds Map Collection, call no. G 3196.C5 1962 MC75P.

Published
1970

35. Map I-510: Geologic map of the Julius Caesar quadrangle of the Moon: Geologic Atlas of the Moon

Author

Morris, E. C. and Wilhelms, Don E. and Morris, E. C. and Wilhelms, Don E.

Abstract

USGS Miscellaneous Investigations Series no. I-510 (LAC-60). Prepared by the U.S. Geological Survey in cooperation with the National Aeronautics and Space Administration and the USAF Aeronautical Chart and Information Center. Includes cross sections, index map, text, and bibliographical references. Located in the Lloyd Reeds Map Collection, call no. G 3196.C5 1962 MC75P.

Published
1967

36. Map I-548: Geologic map of the Mare Vaporum quadrangle of the Moon: Geologic Atlas of the Moon

Author

Wilhelms, Don E. and Wilhelms, Don E.

Abstract

USGS Miscellaneous Investigations Series no. I-548 (LAC-59). Prepared by the U.S. Geological Survey in cooperation with the National Aeronautics and Space Administration and the USAF Aeronautical Chart and Information Center. Includes cross sections, index map, text, and bibliographical references. Located in the Lloyd Reeds Map Collection, call no. G 3196.C5 1962 MC75P.

Published
1968

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