Permian Ammonoid Cyclolobus from the Zewan Formation, Guryul Ravine, Kashmir

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Science  13 Apr 1973:
Vol. 180, Issue 4082, pp. 188-190
DOI: 10.1126/science.180.4082.188


Ammonoid cephalopods serve significantly as a basis for correlation of strata near the boundary between the Paleozoic and Mesozoic Erathems. This is a report of the diagnostically Late Permian (uppermost Paleozoic) ammonoid Cyclolobus walkeri (Diener, 1903) from the Zewan Formation 20 meters below the Permian-Triassic contact at the classic section in Guryul Ravine, Srinagar region, Kashmir.