Which of the following would NOT be definitive evidence that a geologist was looking at a package of rocks from a formerly marine environment?

Question

Quizplus · Accepted Answer

While all of the other options suggest a marine environment (chert is often formed from silica-rich sponges in deep ocean settings, calcium carbonate is a common component of marine shells and skeletons, and evidence of worms and mollusks are typically associated with marine sediment), the presence of medium-grained sandstone alone does not necessarily indicate a marine environment as it can form in a variety of depositional environments.

Which of the Following Would NOT Be Definitive Evidence That