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Coquina, a type of limestone, forms from shell fragments that settle on the ocean floor. what type of rock is coquina?

How do tides affect the organisms living in intertidal zones? a. no organisms live in intertidal zones due to the tumultuous environment. b. the mechanical forces of the waves keeps the organisms clean. c. only plants live in intertidal zones because the animals float away with the waves and never return. d. the mechanical forces of the waves can dislodge the organisms from their habitat.

About how many years does it take for one cycle of surface water to become deep water and then surface water again in the oceans? 101001,000