Informatics Publishing Limited

S. J. Patel ¹, D. M. Shringarpure ¹

Affiliations
1 Department of Geology, M. S. University of Baroda, Vadodara-390 002, IN

Abstract

The occurrence of Glossifungites ichnofacies from the Vinjhanian stage exposed near Vinjhan in Kutch have confirmed its development of the firm but unlithified substrates possibly intertidal to subtidal in nature where the semi consolidated substrate provided resistance to erosion and supported three generations of borings by different organisms. The filling of the borings with gypsum and development of iron-oxide stains on them indicate a major regressive phase of the Vinjhanian stage and diagenetic effects due to chemical variations in the depositional system.

Keywords

Palaeontology, Glossifungites, Bored Rocks, Kutch.

Full Text

     

D. M. Shringarpure ¹, A. N. Shah ¹

Affiliations
1 Department of Geology, M. S. University of Baroda, 390002, IN

Abstract

Some well-preserved star shaped, cylindrical, curved, horizontal and vertical burrow like structures in the green and purple coloured shales of the Subathu roch of Nilkanth are described. Most of these structures are mud-lined, smooth surfaced and have relatively low densities and localised occurrence. These structures recognised as trace fossil burrows of Thalassinoides, Palacophycus and Planolites. Possible Palaeoenvironments in which the trace making communities lived are indicated.

Full Text

   

N. Y. Bhatt ¹, D. M. Shringarpure ², S. J. Patel ²

Affiliations
1 Department of Geology, M.G. Science Institute, Ahmedabad - 380 009, IN
2 Department of Geology, M.S. University of Baroda, Vadodara - 390 002, IN

Abstract

Structures such as sand domes, sand holes and bubble/cavernous sand found in the Chari Sandstone of Kachchh owe their origin to trapping and escaping of air between two water saturated layers of sand in fluctuating tidal conditions.

Keywords

Sand Dome, Sand Hole, Bubble Sand, Cavernous Sand, Chari Formation, Kachchh, Gujarat.

Full Text