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  • 1980-1984  (3)
  • 1984  (2)
  • 1981  (1)
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  • 1980-1984  (3)
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  • 1
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    Mars paleostratigraphy (1984)
    In:  CASI
    Details
    Publication Date: 2006-04-06
    Description: The relative time of emplacement of some major rock units on Mars was recognized to some degree from geologic mapping using Mariner Images. Correlation charts showing the map units and their position in sequence, however, displayed little discrimination in their vertical range of occurrence. A more detailed time-stratigraphy is currently being developed as Viking geologic mapping of the planet progresses.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: NASA. Washington Rept. of Planetary Geology Program, 1983; p 296-297
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    Valles Marineris layered deposits: Implications of origin (1984)
    In:  CASI
    Details
    Publication Date: 2006-04-06
    Description: Layered deposits within Valles Marineris and its associated system of canyons have been considered to consist of two different rock types: (1) thick, competent, cliff-forming, light and dark bedded material in canyon walls, and (2) relatively thin, alternating series of light and dark layered material, both horizontal and inclined, that form rounded hills and large flat-topped mesas rising above the canyon floors. The dissimilarity in appearance between canyon wall and floor materials, as well as their contrasting patterns of erosion, have been considered strong evidence that their modes of origin were different.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: NASA. Washington Rept. of Planetary Geology Program, 1983; p 298-300
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
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    Mars - Paleostratigraphic restoration of buried surfaces in Tharsis montes (1981)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Volcanism in the Tharsis province of Mars occurred in several different areas and was generally continuous without large time intervals between eruptive episodes. Major lava flow units are numerous and extensive, but relatively thin. In many places, impact craters on buried surfaces project above younger flows that overlie them. A new application of crater dating methods has been developed to aid in the identification of these buried surfaces and to determine their lateral extent. The technique is especially adaptable to the Tharsis region where the stratigraphic succession of major flow units has been established by detailed geologic mapping. Knowledge of the overall stratigraphy allows correlations to be made between known and unknown surfaces by comparing their crater frequencies at diameters large enough to insure their recognition on the buried unit. The method has been applied to aid in the restoration of buried rock units and to construct a series of paleostratigraphic maps showing the sequence of major eruptive events in the Tharsis region.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: Icarus; 45; Feb. 198
    Format: text
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    NASA TECHNICAL REPORTS
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