link to main US Geological Survey website
U.S. Geological Survey
Geologic Investigations Series I-2808

Geologic Map of the Ovda Regio Quadrangle (V-35), Venus

By Leslie F. Bleamaster, III, and Vicki L. Hansen

2005

thumbnail sketch of the map

INTRODUCTION

The Ovda Regio quadrangle (V-35), at lat 0º N. to 25º S. and long 90º to 120º E., encompasses approximately 8.4 M km2 of complex geology with intricate volcano-tectonic relationships. The quadrangle was mapped at 1:5,000,000 scale under the Venus Geologic Mapping program. The northern part of V-35 includes south-central Aphrodite Terra, a high-standing, equatorial, plateau region that contains eastern Ovda Regio and western Thetis Regio; the southern region, which is lower in topography, hosts Tahmina Planitia, Gauri Mons, Boszorkany Dorsa, the extensive flows of Inari Corona, and numerous other unnamed deformation centers and corona flows. The Kuanja, Ralk-umgu, and Vir-ava Chasmata system, a highly deformed east-trending zone, defines a geomorphic boundary between the high-standing crustal plateaus of the north and the southern low-lying plains (fig. 1, map sheet). Cross-cutting and embayment relations constrain the relative spatial and temporal relations of map units and tectonic structures within three geographic regions. Within each region, individual tessera units, large corona flows, local volcano-tectonic complexes, chasmata deformation, and impact craters describe a coherent, or logically consistent, geologic history.

Download this map as a PDF document (~38 x 42 inches; 24 MB)

Download Pamphlet to accompany the map (15 pages; 768 KB)

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


Download a current version of Acrobat Reader for free

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

This map is also available from:

USGS Information Services, Box 25286,
Federal Center, Denver, CO 80225
telephone: 303-202-4210; e-mail: infoservices@usgs.gov


| Department of the Interior | U.S. Geological Survey |
URL of this page: http://pubs.usgs.gov/imap/i2808/
Maintained by: Michael Diggles
Created: June 7, 2005
Last modified: June 7, 2005 (mfd)