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Nilanjan Bhowmick AIR 3, CSIR NET (Earth Science)
Saurabh 1 Best Answer
It has to be depression of antiform. Actually it can't be culmination because in that case the hinges must plunge away from each other while in this they seems to be converging or towards each other which will surely give arise to a depressed structure. Note: Also you can read this topic from "Geometry of folds" a chapter basically given in SK ghosh. Author has defined this topic in the simplest manner and it's quite interesting and good to read.