A geologist going through a sediment core is likely to find remnants of ancient calcium carbonate containing ________ and silica containing ________.
A) diatoms / chlorarachniophytes
B) foraminiferans / diatoms
C) chlorarachniophytes / foraminiferans
D) foraminiferans / chlorarachniophytes

Question

Quizplus · Accepted Answer

Calcium carbonate remnants in sediment cores are typically from foraminiferans, while silica remnants are often from diatoms. Both are microscopic organisms found in ocean sediments, with foraminiferans building shells of calcium carbonate and diatoms forming silica-based cell walls.

A Geologist Going Through a Sediment Core Is Likely to Find