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Planetary Geology pdf - NASA

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Exercise Twelve: Geologic Features of Venus<br />

147<br />

100 km<br />

Figure 12.8. The circular features in this image are termed ÒcoronaeÓ (singular: ÒcoronaÓ). Interpreted to have formed by the<br />

rise and then subsidence of subsurface plumes of material, these features are easily identified by the characteristic circular and<br />

radial fracture patterns. Some coronae have been the site of volcanic flows, such as at the corona labeled A. Magellan radar<br />

image (F-MIDR 40N018). North is to the top.<br />

EG-1998-03-109-HQ Activities in <strong>Planetary</strong> <strong>Geology</strong> for the Physical and Earth Sciences<br />

A<br />

N

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