Help please! An example of a biologically formed sedimentary rock would be , which is formed from the remains of once-living marine organisms.

halite
gneiss
limestone

Sedimentary rocks that are formed from physical/chemical processes within the Earth are given the general name of .

clades
clastic
conglomerate

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answer: c.

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above statement is not a true statement about the open ocean because the open ocean has low levels of nutrients. most of the photosynthetic activity on earth occurs in the open ocean within the photic zone. organisms in the deep ocean are exposed to frigid temperatures and total darkness but it does not begin at the low-tide mark.