Which is about foraminiferans is true?
A) Different species are important markers of geological time periods.
B) Shells are composed of silica.
C) They are a valuable source of petroleum and fossil fuels.
D) They contain photosynthetic endosymbionts.
E) They are responsible for the majority of sandstone found on the ocean floor.

Question

Quizplus · Accepted Answer

Foraminiferans are used as important markers of geological time periods because their fossilized shells, which are primarily composed of calcium carbonate, are abundant in sedimentary rock layers and can be used to date those layers.

Which Is About Foraminiferans Is True