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Sankar posted an Question
October 28, 2021 • 21:26 pm 30 points
  • IIT JAM
  • Geology (GG)

13. which of these is lower cambrian 2 points index fossil ? oa. rhynconella trinodosi o b. rusophycus oc. syringothyris cuspidata o d. actinodon risiensis

13. Which of these is Lower Cambrian 2 points index fossil ? OA. Rhynconella trinodosi O B. Rusophycus OC. Syringothyris cuspidata O D. Actinodon risiensis

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    Saurabh 1 Best Answer

    This one seems to be Rusophycus which probably belongs to lower cambrian. While if one talk about Rhynconella trinodosi, a brachiopod date back to Triassic in most of the lithologies . Syringothyris Cuspidata belongs to Carboniferous and Actinodon risiensis has it's traces from Permain Or one cau say lower-middle Permain. So B should be correct.

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