An example of a biogenic sedimentary structure is ____.
A) concretion
B) trace fossil
C) organic formation
D) lagoon
E) pelagic ooze

Question

Quizplus · Accepted Answer

A trace fossil is a type of biogenic sedimentary structure that is formed by the activity of living organisms, such as tracks, burrows, and feeding marks, which are then preserved in sedimentary rock. Concretions are formed by physical and chemical processes, not by organisms. Organic formations and lagoons can contain biological material, but they are not themselves examples of biogenic sedimentary structures. Pelagic ooze is a type of sediment that is formed from the accumulation of small particles in the open ocean, and while it may contain biological material, it is not a structure formed by living organisms.

An Example of a Biogenic Sedimentary Structure Is ____