Geologic map of the Themis Regio quadrangle (V-53), Venus
Scientific Investigations Map
3165
Prepared for the National Aeronautics and Space Administration
By: Ellen R. Stofan and Antony W. Brian
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Abstract
The Themis Regio quadrangle (V-53), Venus, has been geologically mapped at 1:5,000,000 scale as part of the NASA Planetary Geologic Mapping Program. The quadrangle extends from lat 25° to 50° S. and from long 270° to 300° E. and encompasses the Themis Regio highland, the surrounding plains, and the southernmost extension of Parga Chasmata. Themis Regio is a broad regional topographic high with a diameter of about 2,000 km and a height of about 0.5 km that has been interpreted previously as a hotspot underlain by a mantle plume. The Themis rise is dominated by coronae and lies at the terminus of the Parga Chasmata corona chain. Themis Regio is the only one of the three corona-dominated rises that contains significant extensional deformation. Fractures and grabens are much less common than along the rest of Parga Chasmata and are embayed by corona-related flows in places. Rift and corona formation has overlapped in time at Themis Regio.
| Publication type | Report |
|---|---|
| Publication Subtype | USGS Numbered Series |
| Title | Geologic map of the Themis Regio quadrangle (V-53), Venus |
| Series title | Scientific Investigations Map |
| Series number | 3165 |
| DOI | 10.3133/sim3165 |
| Year Published | 2012 |
| Language | English |
| Publisher | U.S. Geological Survey |
| Publisher location | Reston, VA |
| Contributing office(s) | Astrogeology Science Center |
| Description | i, 13p.; 1 Sheet; Sheet 1: 49.39 inches x 33.01 inches |
| Google Analytic Metrics | Metrics page |