Why are boudins and pinch-and-swell structures less common than folds in deformed metamorphic rocks?

What will be an ideal response?


Ans: Boudins and pinch-and-swell structures are less common because (a) they can only form in non-Newtonian media, (b) buckling may form by amplification of initial layer irregularity during layer-parallel shortening, while extension will simply open such irregularities, and (c) folds can form by passive mechanisms, while classical boudins can not.

Environmental & Atmospheric Sciences

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In a region with semidiurnal tides, if a high tide occurs at midnight (12 AM), the next low tide will occur at: a. 12:50 AM the following day

b. 12:25 PM. c. 6:12 AM. d. 6:37 PM.

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What is the projected population of Earth in 2050?

A. 95 billion B. 95 million C. 9.5 billion D. 950 billion

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The slow shifting of the continents and the ocean floors is explained by ____

a. Milankovitch theory b. chemical weathering–CO2 feedback c. the Theory of Plate Tectonics d. the Maunder minimum e. the greenhouse effect

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