PIA02949: Small Craters Engulfed by Smooth Plains
Target Name: Mercury
Is a satellite of: Sol (our sun)
Mission: Mariner Venus Mercury (Mariner 10)
Spacecraft: Mariner 10
Product Size: 356 x 311 pixels (width x height)
Produced By: Northwestern University
Addition Date: 2000-08-05
Other Information: Mariner 10 Image Project
Primary Data Set: MARINER_VENUS_MERCURY_PAGE
Full-Res TIFF: PIA02949.tif (96.03 kB)
Full-Res JPEG: PIA02949.jpg (31.69 kB)

Click on the image above to download a moderately sized image in JPEG format (possibly reduced in size from original)

Original Caption Released with Image:

This double ring basin (top center of image), 220 km in diameter centered at 18 degrees S, 52 degrees W, was photographed on the second encounter and shows two craters about 30 km in diameter which have been engulfed by smooth plains on the floor of the inner ring. This stratigraphic relationship is common in the lunar maria and suggests that the plains within the inner ring were emplaced by volcanic processes after basin formation (FDS 166649).

The Mariner 10 mission, managed by the Jet Propulsion Laboratory for NASA's Office of Space Science, explored Venus in February 1974 on the way to three encounters with Mercury-in March and September 1974 and in March 1975. The spacecraft took more than 7,000 photos of Mercury, Venus, the Earth and the Moon.

Image Credit:
NASA/JPL/Northwestern University

Image Addition Date:
2000-08-05