| 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. |
| Genre: | USGS Numbered Series |
| ProdID: | 70038448 |
| Citation Author: | Stofan, Ellen R.; Brian, Antony W. |
| Citation Contributing Office: | Astrogeology Science Center |
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| Citation Language: | English |
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| Citation Phsyical Description: | i, 13p.; 1 Sheet; Sheet 1: 49.39 inches x 33.01 inches |
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| Citation Public Comments: | Prepared for the National Aeronautics and Space Administration |
| Citation Publisher: | U.S. Geological Survey |
| Citation Series: | Scientific Investigations Map |
| Citation Series Code: | SIM |
| Citation Series Number: | 3165 |
| Citation Search Results Text: | Geologic map of the Themis Regio quadrangle (V-53), Venus; 2012; SIM; 3165; Stofan, Ellen R.; Brian, Antony W. |
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| Citation Year: | 2012 |
| Type: | citation/reference |
| Text: | Geologic map of the Themis Regio quadrangle (V-53), Venus; 2012; SIM; 3165; Stofan, Ellen R.; Brian, Antony W. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/sim_3165.gif |
| URL (INDEX PAGE): | http://pubs.usgs.gov/sim/3165/ |
| Date Other: | Fri, 1 Jun 2012 00:00 -0500 |
| Publisher: | U.S. Geological Survey |
