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Nilanjan Bhowmick AIR 3, CSIR NET (Earth Science)
Gurmeet Singh posted an Question
August 25, 2020 • 21:27 pm
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30 points
30 points
- IIT JAM
- Geology (GG)
Sir, how to guess the answer "in the vertical section of a volcanic sequence showing pilow structures is shown in the given figure". ans given is "c" option.
sir, how to guess the answer "In The vertical section of a volcanic sequence showing pilow structures is shown in the given figure". Ans given is "C" option.
2 Answer(s)
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Rahul kumar Best Answer
Dear student, the answer should be option C. As you can see that the strata is dipping so it must be a part of anticline or syncline. Now you have the look whether it's an anticline or a syncline. If the dip direction will be same as the direction of younging then this should be an anticline and vice-versa. Now as you can see that the lobes of pillow lava are convex towards the dip direction. You might have studied that the convex direction of pillow lava lobes indicates the younging direction. So here in this case the younging direction is same as that of dip direction of the strata/bed hence it must be an anticline.
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sir, i don't understand about how to know, younging direction.
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Convex side of the lobes of pillow lava always indicates younging upward direction.
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Dear student, please ask if you have any confusion. If I was able to clear your doubts then please mark the question as answered.
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sir i was thinking wt would be the question if the answer is syncline.
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If the answer would be syncline then the question would have been like attached figure
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sir, this is the same diagram given in question, but it was anticline.
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This is different question. Here the beds are dipping in opposite direction (left in the figure) as of the younging direction (right in the figure). Whereas in the question the bed was dipping in the same direction as of younging direction.
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Sajan sarthak
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This is a normal phenomenon as the younger direction is shown by diping direction of convex side of the pillow basalt
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sir, are A & B independent to each other?
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see the figure drawn
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thank you so much sir.
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sir is there any difference between best answer and thank you.
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ok.sir, i was not aware of that.
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Sajan sarthak
may be because I didn't not find any relationship among them . and also perhaps They are different time eruptions
sir, can u draw a picture for syncline case.. 2. how to analise dipping direction, means we need to consider for the whole strta or individual spere of pillow lava.