Living reference work entry
Domical-shaped central vent shield volcano.
A type of shield volcano
Tholi on Mars are central vent volcanoes with well-defined summit calderas (BVSP 1981) of up to 10 km in diameter and basal dimensions between 50 and 200 km and a height of 4–10 km (Plescia 2004). They have relatively steep peripheral flanks. Most are asymmetric with a multi-stage caldera, which appear large compared to the edifice itself. Their flanks are often buried under surrounding plains of lava flows, so that their full dimensions are indeterminable (Werner 2009). In structure they resemble shield volcanoes; some, such as Ceraunius Tholus, have numerous radial channel, and others show flow features (BVSP 1981). Most have concentric grabens similar to the large shield volcanoes (BVSP 1981). The distribution named tholi on Mars is shown in Fig. 1.
KeywordsVolcanic Activity Dust Storm Descriptor Term Volcanic Edifice Eruption Event
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
- Basaltic Volcanism Study Project, Kaula WM, Head JW III, Merrill RB, Pepin RO, Solomon SC, Walker D, Wood CA (eds) (1981) Basaltic volcanism on the terrestrial planets. Pergamon Press, Oxford/New York/Frankfurt/Paris/Sydney/Tokyo/TorontoGoogle Scholar
- Mouginis-Mark PJ, Wilson L, Zuber MT (1992) The physical volcanology of Mars. In: Kieffer HH, Jakosky BM, Snyder CW, Matthews MS (eds) Mars. Arizona Press, TucsonGoogle Scholar
- Tanaka KL, Scott DH, Greeley R, Guest JE (1986) Geological map of the polar, western and eastern equatorial regions of Mars (1:15,000,000). USGS: US Geological Survey. USGS Numbered Series M(200) I no.1802–A, B, CGoogle Scholar
© Springer Science+Business Media New York 2014