PHYSICAL EVIDENCE OF VERTICAL AND HORIZONTAL VESICULAR CYLINDERS IN IMAMPUR GHAT SECTION IN AHMEDNAGAR DISTRICT
Author(s):
Prashant Terker, Ashok Tejankar, Monica Chakraborty
Keywords:
Vesicular cylinders; compact basalt (pahoehoe) lava flow; lmampar ghat section
Abstract
Imampur ghat section in Ahmednagar district on Aurangabad – Ahmednagar, Pune highway exhibit physical evidence of vertical as well as horizontal vesicular cylinders. The exposed basalts are found to be massive compact basalt (Pahoehoe) lava flows from elevation of mean sea level (MSL) 605 to the elevation of mean sea level (MSL) 723. There are three vertical vesicular cylinders and three horizontal vesicular zones have been identified. These cylinders vary from 15cm. to 30cm. in width and both have height of 1.5 m. These cylinders are circular to oven shaped in transverse section. The gas migrating channels are vesicular and rarely amygdaloidal in nature. These empty gas cavities have diameter of 0.3 to 0.4 cm. and are having height ranging from 4cm to 7 cm. At few places at top these flow form T junction. During inflation and solidification the circular gas – channels might be generated at the lower vesicular crust below, and migrated upwards within the hot, molten core and ultimately accumulated below the visco-elastic crust as a horizontal to sub-horizontal gas channels. These observations at the excavation site indicate a large pahoehoe lava flow.
Article Details
Unique Paper ID: 151685

Publication Volume & Issue: Volume 8, Issue 1

Page(s): 523 - 530
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