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Geologic map of the greater Denver area, Front Range urban corridor, Colorado Geologic map of the greater Denver area, Front Range urban corridor, Colorado
This digital map shows the areal extent of surficial deposits and rock stratigraphic units (formations) as compiled by Trimble and Machette from 1973 to 1977 and published in 1979 under the Front Range Urban Corridor Geology Program. Trimble and Machette compiled their geologic map from published geologic maps and unpublished geologic mapping having varied map unit schemes. A convenient...
Geologic map of the Margaritifer Sinus Quadrangle of Mars Geologic map of the Margaritifer Sinus Quadrangle of Mars
The Margaritifer Sinus quadrangle lies within a broad north-sloping trough, the Chryse lowlands, between the elevated Tharsis plateau to the west and the cratered upland to the east. The rugged, uniquely martian chaotic terrain is best developed in this quadrangle. Sinuous furrows a few kilometers wide and as much as several hundred kilometers long cover most of the quadrangle; in...