| Abstract: | The Magellan spacecraft orbited Venus from August 10, 1990, until it plunged into the Venusian atmosphere on October 12, 1994. Magellan Mission objectives included (1) improving the knowledge of the geological processes, surface properties, and geologic history of Venus by analysis of surface radar characteristics, topography, and morphology and (2) improving the knowledge of the geophysics of Venus by analysis of Venusian gravity.
The Mead quadrangle (V-21) of Venus is bounded by lat 0 deg and 25 deg N., long 30 deg and 60 deg E. This quadrangle is one of 62 covering Venus at 1:5,000,000 scale. Named for the largest crater on Venus, the quadrangle is dominated by effusive volcanic deposits associated with five major coronae in eastern Eistla Regio (Didilia, Pavlova, Calakomana, Isong, and Ninmah), corona-like tectonic features, and Disani Corona. The southern extremity of Bell Regio, marked by lava flows from Nyx Mons, north of the map area, forms the north-central part of the quadrangle. The shield volcanoes Kali, Dzalarhons, and Ptesanwi Montes lie south and southwest of the large corona-related flow field. Lava flows from sources east of Mead crater flood low-lying areas along the east edge of the quadrangle. |
| Genre: | USGS Numbered Series |
| ProdID: | 77010 |
| Citation Author: | Campbell, Bruce A.; Clark, David A. |
| Citation Contributing Office: | Astrogeology Research Program |
| Citation Datum: | |
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| Citation Edition: | Version 1.0 |
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| Citation Language: | ENGLISH |
| Citation Larger Work Title: | |
| Citation LatN: | 0250000 |
| Citation LatS: | 0000000 |
| Citation LonE: | 0600000 |
| Citation LonW: | 0300000 |
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| Citation No Pagination: | |
| Citation Number Of Pages: | 11 |
| Citation Online Only Flag: | |
| Citation Phsyical Description: | 11 p. pamphlet; map, 46 x 38 in. |
| Citation Projection: | Mercator |
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| Citation Series: | Scientific Investigations Map |
| Citation Series Code: | SIM |
| Citation Series Number: | 2897 |
| Citation Search Results Text: | Geologic map of the Mead quadrangle (V-21), Venus; 2006; SIM; 2897; Campbell, Bruce A.; Clark, David A. |
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| Citation Year: | 2006 |
| Type: | citation/reference |
| Text: | Geologic map of the Mead quadrangle (V-21), Venus; 2006; SIM; 2897; Campbell, Bruce A.; Clark, David A. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/usgs_thumb.jpg |
| URL (INDEX PAGE): | http://pubs.usgs.gov/sim/2006/2897/ |
| URL (DOCUMENT): | http://pubs.usgs.gov/sim/2006/2897/sim2897pamphlet.pdf |
| Date Other: | Thu, 6 Jul 2006 00:00 -0500 |
| Publisher: | |
