Ascraeus Caldera Wall

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Caption:

20 May 2004
This Mars Global Surveyor (MGS) Mars Orbiter Camera (MOC) image shows the wall on one of the calderae at the summit of the large volcano, Ascraeus Mons. A caldera is a large depression formed by collapse after magma in a volcano is erupted from or withdrawn to a greater depth. After collapse, the wall of this caldera was further modified by downslope movement of debris and it was pelted by small meteors to form a scattering of small craters. This image is located near 11.6°N, 104.6°W, and covers an area about 3 km (1.9 mi) across. The picture is illuminated by sunlight from the lower left.

Cataloging Keywords:

Name	Value	Additional Values
Target	Mars
System
Target Type	Planet
Mission	Mars Global Surveyor (MGS)
Instrument Host	Mars Global Surveyor
Host Type	Orbiter
Instrument	Mars Orbiter Camera (MOC)
Detector
Extra Keywords	Crater, Grayscale, Mountain, Volcano
Acquisition Date
Release Date	2004-05-20
Date in Caption	2004-05-20
Image Credit	NASA/JPL/Malin Space Science Systems
Source	photojournal.jpl.nasa.gov/catalog/PIA05977
Identifier	PIA05977