link to main US Geological Survey website
U.S. Geological Survey
Scientific Investigations Map 2897

Geologic Map of the Mead Quadrangle (V-21), Venus

By Bruce A. Campbell and David A. Clark


thumbnail sketch of the map

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° and 25° N., long 30° and 60° 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.

Download this map as a PDF document (~45 x 38 inches; 19.1 MB)

Download the accompanying pamphlet as a PDF document (11 pages; 788 KB)

For questions about the content of this report, contact Ken Tanaka

Version history

Download a current version of Adobe Reader for free

| Help | PDF help | Publications main page | Other Planetary Maps |
| Privacy Statement | Disclaimer | Accessibility |
| Geologic Division | Astrogeology Research Program |

This map is available in paper form from:

USGS Information Services, Box 25286,
Federal Center, Denver, CO 80225
telephone: (888) ASK-USGS; e-mail:

| Department of the Interior | U.S. Geological Survey |
URL of this page:
Maintained by: Michael Diggles
Created: July 4, 2006
Last modified: July 4, 2006 (mfd)