GEO 330 Lecture Notes - Lecture 9: Albor Tholus, Alba Mons, Hecates Tholus
21 Feb 2018
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Document Summary
Largest volcano in the solar system at 840 x 640km wide and 21km high. Flanks are somewhat asymmetric but still have gentle slopes. The edifice is surrounded by a cliff and an areole. The summit is composed in six nested calderas. The total depression is 72 x 91km across and up to. Multiple calderas indicate that magma chamber may have been moving underneath volcano. The cliff is up to 8km high in some areas. The aureole consists of several lobes of material extending from the shield. At least four main lobes to the west with several minor lobes on west and east sides. Inner parts of many lobes are buried by younger lava flows. Aureole caused by massive failure of shield edifice. Characterized by large size, low slopes, huge fractures surrounding shield, and extremely long lava flows on flanks. At the center is an edifice 350km across and 1. 5km high with a 200m deep central caldera.
