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The AAPG/Datapages Combined Publications Database

Journal of Sedimentary Research (SEPM)

Abstract


Journal of Sedimentary Petrology
Vol. 33 (1963)No. 3. (September), Pages 739-750

Evidence for a Talchir (Lower Gondwana) Glaciation: Striated Pavement and Boulder Bed at Irai, Central India

Alec J. Smith

ABSTRACT

Recent work on slump conglomerates has created the need for the reassessment of ancient tillite deposits. The widespread upper Carboniferous Talchir boulder bed which commences the Gondwana succession of India has been interpreted as a tillite for more than 100 years. At only one place, however, is this tillite exposed resting on a striated pavement.(FOOTNOTE 2) The pavement, which is exposed at Irai, has all the features of a glaciated pavement and as such points strongly to a glacial origin for the Talchir boulder bed in this part of India. The northerly direction of movement of the eroding ice can be ascertained from a variety of structures. The pavement and the overlying boulder bed are described here and possible alternatives to a glacial origin are discussed.


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