Discovery of Jurassic ammonoids from the Shyok suture zone to the northeast of Chang La Pass, Ladakh, northwest India and its tectonic significance |
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| Authors: | Masayuki Ehiro Satoru Kojima Tadashi Sato Talat Ahmad Tomoyuki Ohtani |
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| Affiliation: | The Tohoku University Museum, Aoba 6-3, Aramaki, Aoba-ku, Sendai 980-8578 (email: ),;Department of Civil Engineering, Gifu University, Gifu,;Fukada Geological Institute, Tokyo, Japan, and;Department of Geology, University of Delhi, Delhi, India |
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| Abstract: | Abstract Callovian (late Middle Jurassic) ammonoids Macrocephalites and Jeanneticeras were recovered from the Shyok suture zone, northeast of Chang La Pass, Ladakh, northwest India. They are the first reliable Jurassic fossils and the oldest chronologic data from the Shyok suture zone. The ammonoid-bearing Jurassic strata, newly defined as the Tsoltak Formation, consist largely of terrigenous mudstone with thin sandstone beds and were probably a part of the continental basement to the Cretaceous Ladakh Arc. |
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| Keywords: | ammonoid Himalaya Jurassic Ladakh Arc Shyok suture zone Tsoltak Formation |
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