Geologic Map of the Niobe Planitia Region (I‐2467), Venus

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

Geologic Map of the Meskhent Tessera Quadrangle (V–3), Venus

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...

Geologic Map of the Western Equatorial Region of Mars

Although the origin and composition of many units are obscure or controversial, their interpretations are based on objective descriptions of morphologic characteristics visible on Viking photomosaics and images. LOWLAND TERRAIN MATERIALS Consist of all plains-forming units between the highland-lowland boundary scarp and the north edge of the map area, exclusive of materials of the western volca...

Geologic Analysis of Deformation in the Interior Region of Artemis (venus,

Introduction: Artemis measures approximately 2600 km in diameter making it the largest known circular structure on a terrestrial planet. Artemis' most distinctive feature is Artemis Chasma, a ~25-200 km wide, ~1-2 km deep, ~2100 km diameter circular trough surrounding an interior topographic high. Ve-nus' surface abounds with circular to quasi-circular features at a variety of scales including,...

Venus southern hemisphere: geologic character and age of terrains in the themis-alpha-lada region.

Arecibo high-resolution radar images of the southern hemisphere of Venus extending to 78 degrees S show that the surface of the Themis-Alpha-Lada region is characterized by linear deformation zones with volcanoes and corona-like features and by regional volcanic deposits (primarily plains, small shields, and large edifices). Large-scale areal deformation is limited to the tessera of Alpha Regio...