Discussion
Which of the following stratigraphic unit is of Permian-Triassic age ?
Answer: D
The Permian-Triassic unit is the Guryul ravine section (spelt 'Guruyul ravines' in the paper).
The Guryul ravine near Srinagar in Kashmir exposes a continuous marine succession across the Permian-Triassic boundary, from the Zewan Formation (Permian) to the Khunamuh Formation (Permian to Triassic). It is one of the world's reference sections for the end-Permian mass extinction.
The Haimanta Group of the Tethys Himalaya is late Precambrian to Cambrian. The Muth Formation is a Silurian to Devonian quartzite of the Spiti region. The Kali Formation is not the unit cited for this boundary. Only Guryul spans the Permian-Triassic.
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