Astrogeology Science Center

Publications

Filter Total Items: 834
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Year Published: 1982

The geology of Europa

The map units and lineations of Europa are detailed, and the geologic processes, and history, and thick and thin ice models of the satellite are discussed. It is concluded that Europa lacks evidence of a horizontally stratified crust; the geology appears characterized by disruption of the crust and intrusions into an icy shell. The surface...

Lucchitta, Baerbel K.; Soderblom, Laurence A.

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Year Published: 1981

The geologic investigation of the Taurus-Littrow Valley; Apollo 17 landing site, with a section on Apollo 17 lunar surface photography

No abstract available.

Wolfe, Edward W.; Bailey, N.G.; Lucchitta, Baerbel K.; Muehlberger, W.R.; Scott, D.H.; Sutton, R.L.; Wilshire, H.G.; Batson, R.M.; Larson, K.B.; Tyner, R.L.
The geologic investigation of the Taurus-Littrow Valley; Apollo 17 landing site, with a section on Apollo 17 lunar surface photography; 1981; PP; 1080; Wolfe, Edward W.; Bailey, N. G.; Lucchitta, B. K.; Muehlberger, W. R.; Scott, D. H.; Sutton, R. L.; Wilshire, H. G.; Batson, R. M.; Larson, K. B.; Tyner, R. L.

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Year Published: 1981

Synchrotron radiation and its application to digital subtraction angiography

The intense synchrotron radiation produced at electron storage rings provides a new source of X-rays highly suited to iodine K-edge digital subtraction angiography. The high intensity and small angular divergence permit the radiation to be monochromatized by Bragg diffraction and made available in beams of small vertical size, of arbitrary...

Rubenstein, E.; Hughes, E.B.; Campbell, L.E.; Hofstadter, R.; Kirk, Randolph L.; Krolicki, T.J.; Stone, J.P.; Wilson, S.; Zeman, H.D.; Brody, W.R.

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Year Published: 1981

Did ice streams carve martian outflow channels?

Outflow channels on Mars1 are long sinuous linear depressions that occur mostly in the equatorial area (±30° lat.). They differ from small valley networks2 by being larger and arising full born from chaotic terrains. Outflow channels resemble terrestrial stream beds, and their origin has generally been attributed to water3–5 in...

Lucchitta, Baerbel K.; Anderson, D.M.; Shoji, H.
Did ice streams carve martian outflow channels?; 1981; Article; Journal; Nature; Lucchitta, B. K.; Anderson, D. M.; Shoji, H.

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Year Published: 1981

Mars and Earth: Comparison of cold-climate features

On Earth, glacial and periglacial features are common in areas of cold climate. On Mars, the temperature of the present-day surface is appropriate for permafrost, and the presence of water is suspected from data relating to the outgassing of the planet, from remote-sensing measurements over the polar caps and elsewhere on the Martian surface, and...

Lucchitta, Baerbel K.
Mars and Earth: Comparison of cold-climate features; 1981; Article; Journal; Icarus; Lucchitta, B. K.

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Year Published: 1981

Ridges and scarps in the equatorial belt of Mars

The morphology and distribution of ridges and scarps on Mars in the ± 30° latitude belt were investigated. Two distinct types of ridges were recognized. The first is long and linear, resembling mare ridges on the Moon; it occurs mostly in plains areas. The other is composed of short, anastomosing segments and occurs mostly in ancient cratered...

Lucchitta, Baerbel K.; Klockenbrink, J.L.
Ridges and scarps in the equatorial belt of Mars; 1981; Article; Journal; The Moon and the Planets; Lucchitta, B. K.; Klockenbrink, J. L.

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Year Published: 1980

Grooved terrain on Ganymede

The icy crust of Ganymede comprises bright and dark areas. Investigation of Voyager 1 and 2 images has shown that bright terrain is grooved and separates dark polygons of cratered terrain. The grooved terrain contains alternating ridges and grooves in straight and curvilinear sets, which are locally interrupted by smooth patches and swaths....

Lucchitta, Baerbel K.

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Year Published: 1980

Stability of sulfur slopes on Io

The mechanical properties of elemental sulfur are such that the upper crust of Io cannot be primarily sulfur. For heat flows in the range 100–1000 ergs cm−2, sec−1, sulfur becomes ductile within several hundred meters of the surface and would prevent the formation of calderas with depths greater than this. However, the one caldera for which...

Clow, Gary D.; Carr, M.H.

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Year Published: 1979

Atlas of Mars: the 1:5,000,000 map series

This atlas comprises small-scale maps and photomosaics covering the entire surface of the planet Mars. The cartographic contents are reduced-scale versions of the 1:5,000,000 topographic series of 30 quadrangles compiled by the U.S. Geological Survey in cooperation with the National Aeronautics and Space Administration (NASA).

Batson, R.M.; Bridges, P.M.; Inge, J.L.
Atlas of Mars: the 1:5,000,000 map series; 1979; Federal Government Series; 438; Batson, R. M.; Bridges, P. M.; Inge, J. L.

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Year Published: 1979

Altitude-age relationships of the lunar maria

Altitudes and relative ages of mare surface units were compared to test if a systematic correlation in height of lava eruption surfaces and age might reflect a corresponding increase in depth of the magma chamber with time; in addition the altitudes were studied to shed light on the time and place of warping of mare surfaces. The laser altimeter...

Lucchitta, Baerbel K.; Boyce, J.M.

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Year Published: 1979

Landslides in Valles Marineris, Mars.

Large landslides in the Martian equatorial troughs have been investigated with respect to morphology, geologic structure of the troughs, time of emplacement, similarity to terrestrial landslides, and origin and mechanism of transport. The morphologic variations of the landslides can be attributed mainly to their degree of confinement on trough...

Lucchitta, Baerbel K.
Landslides in Valles Marineris, Mars.; 1979; Article; Journal; Journal of Geophysical Research; Lucchitta, B. K.

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Year Published: 1979

Relative age of Camelot crater and crater clusters near the Apollo 17 landing site

Topographic profiles and depth-diameter ratios from the crater Camelot and craters of the central cluster in the Apollo 17 landing area suggest that these craters are of the same age. Therefore, layers that can be recognized in the deep-drill core and that can be identified as ejecta deposits from Camelot or from the cluster craters should yield...

Lucchitta, Baerbel K.
Relative age of Camelot crater and crater clusters near the Apollo 17 landing site; 1979; Article; Journal; Icarus; Lucchitta, B. K.