Which of the following is a rocky,layered structure that forms over time as a mat of aquatic prokaryotic cells traps sediments?
A) Ozone layer
B) Stromatolite
C) Petroglyphs
D) Stalactites
E) Foraminifera

Question

Which of the following is a rocky,layered structure that forms over time as a mat of aquatic prokaryotic cells traps sediments?  
A) Ozone layer
B) Stromatolite
C) Petroglyphs
D) Stalactites
E) Foraminifera

Quizplus · Accepted Answer

Stromatolites are layered structures that are formed over time as a mat of aquatic prokaryotic cells, usually cyanobacteria, trap sediment. The layers build up over time, creating a rocky structure. The other choices - ozone layer, petroglyphs, stalactites, and foraminifera - are not formed in this way.

Which of the Following Is a Rocky,layered Structure That Forms