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The Memnonia quadrangle lies astride the boundary between heavily cratered and sparsely cratered hemispheres of Mars (Carr and others, 1973). Densely cratered terrain occurs in the southwestern part of the quadrangle. Strips of plains material bound the cratered terrain in both the northern and eastern parts of the quadrangle. There is approximately 3 km of relief across the quadrangle, with the highest elevations in the eastern part. Plains materials of this region are situated along the lower Lacus and Tharsis quadrangles. There is little correlation between terrain type and elevation within the Memnonia quadrangle. In particular, the boundary between cratered terrain and plains for the most part is not marked...
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The Diacria quadrangle lies within the north circumpolar lowlands of Mars (Carr and others, 1973; Scott and Carr, 1978). The dominant structural and physiographic features are low, relatively smooth plains (Arcadia Planitia, Vastitas Borealis) that form the northern two-thirds of the quadrangle. The plains rise to the south to form the north edge of the Amazonis Planitia and to the southeast toward two major volcanic provinces of Mars, Olympus Mons and Alba Patera. The aureole deposits of these knobby terrain occurs in the southwestern part of the quadrangle and rises toward the Elysium volcanic province that lies 1600 km to the west. Original mapping of this quadrangle was from Mariner 9 pictures. The mapping was...
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The surface of the moon is heterogeneous. Surface materials are classed on the basis of telescopic observations into units each having a limited range of physical properties such as topography, visible under low-illumination and albedo, the reflectivity under full-Moon illumination. Such units are considered analogous to the rock-stratigraphic formations of terrestrial geology. By application of the principles of superposition and intersection, these rock units are arranged in order of relative age and grouped into time stratigraphic units. Following terrestrial contention, the major time-stratigraphic units are designated systems, and their subdivisions, series; corresponding to these units are periods and epochs...
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The Amazonis quadrangle lies within the northern sparsely cratered hemisphere of Mars (Carr and others, 1973). The dominant structural and physiographic features of the quadrangle are low featureless plains (Amazonis Planitia) in the center third of the quadrangle, the western flanks of the large volcanic construct, Olympus Mons, and its associated aureole deposits (Lycus Sulci), which lies on the eastern slopes of the plains, and an area of rough knobby terrain along the west edge of the quadrangle. The central plains descend northward into the circumpolar lowlands (Arcadia Planitita, Vastitas Borealis) and rise southward where they are bounded by the cratered terrains of the equatorial region of Mars.
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Olympus Mons is the largest known volcanic construct in the Solar System; it is more than 600 km across and more than 27 km above datum. The volcano and the great scarp that bounds it have been the subject of much scientific controversy. Although it has been possible to generate an empirical model that closely resembles Olympus Mons, the dynamics of scarp formation are still unproven. The scarp area is thus a logical selection as a scientific study area. It has also been designated as a a candidate site for a proposed lander/rover/sample-return mission to Mars not only because the site may provide information about the origin of the scarp and the evolution of Olympus Mons, but also because rocks of widely diverse...
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