Ignimbrites of Amazonis Planitia region of Mars

Details Ignimbrites of Amazonis Planitia region of Mars Ignimbrites of Amazonis Planitia region of Mars

Feb 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982jgr....87.1179s&link_type=abstract

Journal of Geophysical Research, vol. 87, Feb. 10, 1982, p. 1179-1190.

Mathematics

Logic

132

Igneous Rocks, Mars Surface, Planetary Geology, Spaceborne Photography, Viking Mars Program, Volcanology, Geological Surveys, Geomorphology, Lava, Mars Volcanoes, Mineral Deposits, Planetary Mapping, Space Exploration, Stratigraphy, Terrain Analysis, Mars, Amazonis Planitia, Ignimbrites, Memnonia Planitia, Aeolis Planitia, Mapping, Olympus Mons, Lava, Lowlands, Stratigraphy, Flows, Basalts, Craters, Surface, Features, Grooves, Yardangs, Wind, Formation, Data, Morphology, Comparisons, Albedo, Topography, Thi

Scientific paper

The terms ignimbrite and ash flow tuff are used to describe relatively thin but extensive sheets of material interpreted to be of pyroclastic origin and to consist of volcanic ash or pumice fragments. Criteria for distinguishing ignimbrites from other geologic materials are considered, and characteristics observed for rock units interpreted as ignimbrites in Amazonis Planitia are discussed. A series of rock units which are thought to represent ignimbrites have been mapped along an east-west border zone between the highland plateau and lowland plains of Amazonis Planitia. The area is roughly bounded by a triangle whose apices are the volcanoes Apollinaris Patera, Biblis Patera, and Olympus Mons. Attention is given to aspects of general geology, morphology and stratigraphy, and thickness and volume estimates. Correlations with other data are considered and some theoretical aspects of Martian ignimbrite emplacement are discussed.

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