Which of the following sites has volcanism related to a hot spot or divergent margin? A is on an island arc, B is in the Andes,
C is near Hawaii, D is along a mid-ocean ridge.
1 answer:
Question Options:
A. A and B
B. B and C
C. C and D
D. A and C
E. B and D
Answer: C and D. C is near Hawaii, D is along a mid-ocean ridge
Hotspot in geology is the surface manifestation of a plume that rises from deep in the celestial body's mantle.
Divergent margins also known as rift zones, shield volcanoes tend to form as two oceanic plates pull slowly apart and magma effuses upward through the gap.
The sites based on history that has volcanism related to a hot spot or divergent margin are Hawaii and the mid-ocean ridge. Hawaiian volcanoes within the Pacific Plate are caused by anomalous volcanism.
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Answer:
The correct option is B. all the same approximate size
Explanation:
The sorting of sediments is the distribution of the particles or the grains of the sediments on the basis of the grain size. The sediments are classified into the following categories on the basis of their grain size : very poorly, poorly, moderately , well and finally, very well sorted.
The sorting is quantified by using the Inclusive Graphic Standard Deviation represent by
For a well-sorted layer of sediment, the Inclusive Graphic Standard Deviation is:
, diameter (phi units)
Therefore, in a well-sorted layer of sediment, all the grains will be of the same approximate size.