How would we identify a buckle fold?
What will be an ideal response?
Ans: Folding is restricted to a competent layer in a less competent matrix, with the folds rapidly dying out away from the competent layer. The folds are periodic, meaning that they have a characteristic wavelength. This characteristic wavelength is longer for thick layers than for thin ones. Buckle folds are parallel (Class 1B) folds with a neutral surface.
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When two continental plates collide the result is the formation of new ocean crust
Indicate whether the statement is true or false
What statement is true of the surface area of oceanic ridges and their associated features?
A) They consist of slightly less area than that of all the land above sea level. B) They consist of more area than that of all land above sea level. C) These are almost always located in the mid-ocean. D) These areas are largely covered by sediments.
Primary productivity per square meter of ocean surface is, on the average, higher in the neritic zone than in the oceanic zone.
Answer the following statement true (T) or false (F)
Halley's comet has an average orbital period of ________ years.
A. 76 B. about 10,000 C. 10 D. 577 E. about 100,000