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Cones and craters on Mount Pavagadh, Deccan Traps: Rootless cones?

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Title Cones and craters on Mount Pavagadh, Deccan Traps: Rootless cones?
 
Creator SHETH, HC
MATHEW, G
PANDE, K
MALLICK, S
JENA, B
 
Subject central india
pahoehoe
province
deccan volcanism
iceland
mars
pavagadh
rootless cones
pseudocraters
 
Description Rootless cones, also (erroneously) called pseudocraters, form due to explosions that ensue when a lava flow enters a surface water body, ice, or wet ground. They do not represent primary vents connected by vertical conduits to a subsurface magma source. Rootless cones in Iceland are well studied. Cones on Mars, morphologically very similar to Icelandic rootless cones, have also been suggested to be rootless cones formed by explosive interaction between surface lava flows and ground ice. We report here a group of gentle cones containing nearly circular craters from Mount Pavagadh, Deccan volcanic province, and suggest that they are rootless cones. They are very similar morphologically to the rootless cones of the type locality of Myvatn in northeastern Iceland. A group of three phreatomagmatic craters was reported in 1998 from near Jabalpur in the northeastern Deccan, and these were suggested to be eroded cinder cones. A recent geophysical study of the Jabalpur craters does not support the possibility that they are located over volcanic vents. They could also be rootless cones. Many more probably exist in the Deccan, and volcanological studies of the Deccan are clearly of value in understanding planetary basaltic volcanism.
 
Publisher INDIAN ACADEMY SCIENCES
 
Date 2011-08-02T01:41:15Z
2011-12-26T12:53:36Z
2011-12-27T05:40:11Z
2011-08-02T01:41:15Z
2011-12-26T12:53:36Z
2011-12-27T05:40:11Z
2004
 
Type Article
 
Identifier PROCEEDINGS OF THE INDIAN ACADEMY OF SCIENCES-EARTH AND PLANETARY SCIENCES, 113(4), 831-838
0253-4126
http://dspace.library.iitb.ac.in/xmlui/handle/10054/8611
http://hdl.handle.net/10054/8611
 
Language en