FACIES AND SEDIMENTARY ENVIRONMENT OF LOWER CRETACEOUS ROCKS (BAREMIAN - ALBIAN) OF NORTH EAST OF ESFAHAN

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SAFARI ATEFEH

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Journal Paper

Paper Information

Journal: RESEARCH JOURNAL OF UNIVERSITY OF ISFAHAN "SCIENCE" Year:2000 | Volume:13 | Issue:1 Page(s): 143-164

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Information Journal Paper

Title

FACIES AND SEDIMENTARY ENVIRONMENT OF LOWER CRETACEOUS ROCKS (BAREMIAN - ALBIAN) OF NORTH EAST OF ESFAHAN

Author(s)

SAFARI ATEFEH | Issue Writer Certificate

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Abstract

The sedimentary deposits of lower Cretaceous in khaseh Tarash area at 50 km northeast of Esfahan with 600m thickness are mainly of terrigenous and carbonate sediments which are orverlaying Jurasic (Lias) sediments after angular - unconformity.After studing microscopical tin section and sedimentary microfacies in general, three types of sedimentary environments of open marine, barrier or bar and lagoon - Tidal flat were distinguished. These rocks were formed in shallow sea water environment of epicontinental platform around continental margins.Vertical changes of microfacies along with depth indicate that, the lower Cretaceous rocks in these areas were formed by upward cycles of deposition in meter scales, which in overall formed a progressive big cycle in million year scale.Apparently, the small cycles were originated from static sea water fluctuations or climatic cycles and bigger scale cycles were formed by techno static rising of sea water which was caused by opening of plate tectonics.

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