Astrogeology Science Center

Publications

Filter Total Items: 882
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Year Published: 1978

Geologic map of the Ismenius Lacus Quadrangle of Mars

No abstract available.

Lucchitta, Baerbel K.
Geologic map of the Ismenius Lacus Quadrangle of Mars; 1978; I; 1065; Lucchitta, B. K.

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Year Published: 1978

Geologic map of the north side of the Moon

No abstract available.

Lucchitta, Baerbel K.
Geologic map of the north side of the Moon; 1978; I; 1062; Lucchitta, B. K.

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Year Published: 1978

A large landslide on Mars

A large landslide deposit on the south wall of Gangis Chasma contains at least 100 billion m3of material that moved 60 km across the trough floor at a speed of more than 100 km/hr. The deposit consists of slump blocks at the head, hummocky material farther out, and a vast apron of longitudinally ridged material extending to the toe. The landslide...

Lucchitta, Baerbel K.

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Year Published: 1978

Age of graben systems on the moon

The study focuses on the time of formation of the graben. An attempt is made to determine whether the graben are restricted to geologic units of certain ages, and whether and at what time graben formation ceased. It is shown that (1) most preserved graben formed considerably later than the impacts that formed the basins; (2) graben are faults that...

Lucchitta, Baerbel K.; Watkins, Jessica A.

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Year Published: 1977

Topography, structure, and mare ridges in southern Mare Imbrium and northern Oceanus Procellarum

The gross topography in southern Mare Imbrium and northern Oceanus Procellarum correlates with the buried structure and deposits of the Imbrium Basin and its rim, and many of the mare slopes may be depositional and reflect the pre-existing major features of the basin. Post-depositional, local distortion of the mare surface, however, is present and...

Lucchitta, Baerbel K.

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Year Published: 1977

Crater clusters and light mantle at the Apollo 17 site: A result of secondary impact from Tycho

The morphologies of Tycho secondary craters and their ejecta deposits were studied using full-Moon, Lunar-Orbiter, and Apollo panoramic photographs. These data were compared with similar data for the secondary craters and light mantle of the Apollo 17 landing site. The results indicate that (1) the central crater cluster and the light mantle can...

Lucchitta, Baerbel K.

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Year Published: 1975

Apollo 12 voice transcript pertaining to the geology of the landing site

This document is an edited record of the conversations between the Apollo 12 astronauts and mission control pertaining to the geology of the landing site. It contains all discussions and observations documenting the lunar landscape, its geologic characteristics, the rocks and soils collected, and the lunar surface photographic record along with...

Bailey, N.G.; Ulrich, G.E.
Apollo 12 voice transcript pertaining to the geology of the landing site; 1975; USGS Unnumbered Series; Bailey, N. G.; Ulrich, G. E.

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Year Published: 1974

Apollo 11 voice transcript pertaining to the geology of the landing site

On July 20, 1969, America's Eagle touched down in southwestern Mare Tranquillitatis beginning man's firsthand exploration of the moon. This document is an edited record of the conversations between astronauts Neil Armstrong and Edwin "Buzz" Aldrin, Jr., at Tranquility Base, and Bruce McCandless at Mission Control in Houston during the...

Bailey, N.G.; Ulrich, G.E.
Apollo 11 voice transcript pertaining to the geology of the landing site; 1974; USGS Unnumbered Series; Bailey, N. G.; Ulrich, G. E.

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Year Published: 1974

North polar region of Mars: Imaging results from Viking 2

During October 1976, the Viking 2 orbiter acquired approximately 700 high-resolution images of the north polar region of Mars. These images confirm the existence at the north pole of extensive layered deposits largely covered over with deposits of perennial ice. An unconformity within the layered deposits suggests a complex history of climate...

Cutts, J.A.; Blasius, K.R.; Briggs, G.A.; Carr, M.H.; Greeley, Ronald; Masursky, Harold

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Year Published: 1974

Orange material in the Sulpicius Gallus formation at the southwestern edge of Mare Serenitatis

Orange and red materials were observed and photographed in the dark mantle of the Sulpicius Gallus Formation on the southwestern rim of the Serenitatis basin. These materials occur only within the dark mantle that overlies old rilled mare and highland units and are absent on the younger mare unit in this area. Orange and red materials occur...

Lucchitta, Baerbel K.; Schmitt, H.H.

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Year Published: 1973

Apollo lunar sounder experiment

The scientific objectives of the Apollo lunar sounder experiment (ALSE) are (1) mapping of subsurface electrical conductivity structure to infer geological structure, (2) surface profiling to determine lunar topographic variations, (3) surface imaging, and (4) measuring galactic electromagnetic radiation in the lunar environment. The ALSE was a...

Phillips, R.J.; Adams, G.F.; Brown, W.E.; Eggleton, R.E.; Jackson, P.; Jordan, R.; Linlor, W.I.; Peeples, W.J.; Porcello, L.J.; Ryu, J.; Schaber, G.; Sill, W.R.; Thompson, T.W.; Ward, S.H.; Zelenka, J.S.
Apollo lunar sounder experiment; 1973; Book chapter; 330; Federal Government Series; Apollo 17 preliminary science report (NASA SP-330); Phillips, R. J.; Adams, G. F.; Brown, W. E., Jr.; Eggleton, R. E.; Jackson, P. ; Jordan, R. ; Linlor, W. I.; Peeples, W. J.; Porcello, L. J.; Ryu, J. ; Schaber, G. ; Sill, W. R.; Thompson, T. W.; Ward, S. H.; Zelenka, J. S.

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Year Published: 1973

Crater studies: Part A: lunar crater morphometry

Morphometry, the quantitative study of shape, complements the visual observation and photointerpretation in analyzing the most outstanding landforms of the Moon, its craters (refs. 32-1 and 32-2). All three of these interpretative tools, which were developed throughout the long history of telescopic lunar study preceding the Apollo Program, will...

Pike, Richard J.
Crater studies: Part A: lunar crater morphometry; 1973; Book chapter; 330; Federal Government Series; Apollo 17 preliminary science report (NASA SP-330); Pike, Richard J.