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Petrographic and Facies Evaluation of Middle Siwalik Subgroup of Jammu, Himalaya
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This paper embodies the results on the study of depositional environment, provenance and tectonic setting of Middle Siwalik Subgroup of Jammu region. The data obtained on lithofacies, sedimentary structures and nature of contacts between various lithofacies, suggest multiple episodes of avulsion and abandonment of the channel system for a new course in braided river system. Four variable plot of quartz types shows that these sediments have been derived from low rank metamorphic source. The detrital modes (quartz, feldspar and lithic fragments) plotted on complementary ternary diagrams (QFL and QmFLt) indicate that these sediments have been shed from recycled orogens, transitional arc and transitional continental provinces.
Keywords
Sedimentology, Siwalik, Jammu, Himalaya.
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