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Gurmeet Singh posted an Question
August 23, 2020 • 23:06 pm 30 points
  • IIT JAM
  • Geology (GG)

Youngest layer: as layer 1, 4 trilobite which is extinct in permian and layer 5,6 are anthozoa(cnidarians) living fossil so ans should be 5,6. but 5 or 6 ?

Layer 1 Layer2 Layera Layer4 Layer 5 Layer 6 youngest layer: as layer 1, 4 trilobite Which is extinct in Permian and layer 5,6 are anthozoa(cnidarians) living fossil so ans should be 5,6. but 5 or 6 ?

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    Rahul kumar

    Please ask me in case of any clarification you need.

  • comment-profile-img>
    Rahul kumar best-answer

    Dear student, there are only two possible answer either layer 1 or layer 6. You can't find any youngest or oldest layer in between the succession i.e. layer 2,3,4,5 will be of intermediate age. Either it will a younging upward section (normal stratigraphic order) or younging downward succession (overturned beds). Answer would be either layer 1 or layer 6. Now looking at the question, extinct trilobite is at the top which is not possible, so it must be an overturned section i.e. oldest layer at the top and youngest at the bottom. So the answer should be layer 6.

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    Rahul kumar Best Answer

    Dear student, I couldn't see the question. Please type the question here so that I can help you with that.

    eduncle-logo-app

    which is the Youngest layer in the picture given, i thought as layer 1, 4 is of trilobite which was extinct in permian time and layer 5th, and 6th are anthozoa( i.e cnidarians) which is living fossil so answer should be 5th or 6th layer but i m confused in accurate answer.

    eduncle-logo-app

    and. the given answer is layer 6th.. but don't know how.

    eduncle-logo-app

    these are given fossils in a cliff.

    eduncle-logo-app

    Dear student, there are only two possible answer either layer 1 or layer 6. You can't find any youngest or oldest layer in between the succession i.e. layer 2,3,4,5 will be of intermediate age. Either it will a younging upward section (normal stratigraphic order) or younging downward succession (overturned beds). Answer would be either layer 1 or layer 6. Now looking at the question, extinct trilobite is at the top which is not possible, so it must be an overturned section i.e. oldest layer at the top and youngest at the bottom. So the answer should be layer 6.

    eduncle-logo-app

    ok means we have to restrict with the sequence. finalizs the ans by Normal or overturned of bedding.?

    eduncle-logo-app

    Yes, correct

    eduncle-logo-app

    ok sir.

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