On the geologic map shown here (actually more a tectonic map), yellow areas are 1 km and
more above the mean elevation of Venus. These areas are generally large
volcanic centers. There are two large "continents" on Venus that contain
large areas of tectonically uplifted and deformed crust. Blue areas are
below the mean radius of Venus and comprise most of the Planitia areas on
Venus. These areas are mostly lava plains with no to moderate amounts of
Structual features are shown as follows:
Normal faults are dark green with hachures on the downdropped side.
Dorsa (compressional ridges) are black lines with solid black
Named volcanic features (Tholus, Patera, Farrum, most Montes) are
red triangles. This is by no means a complete inventory.
Named tesserae are dark blue stars.
Named coronae are circles with hachures pointing outward. They are
approximated as circles although many are elliptical or somewhat
irregular. Some geologists interpret coronae as analogous to terrestrial
Named craters are plain circles. Most are too small to show
prominently at this scale.