Question

Limestone is formed from the shells of aquatic organisms. It is _____.

an organic sedimentary rock
an extrusive igneous rock
an intrusive igneous rock
a clastic sedimentary rock

Answer 1

An organic sedimentary rock.

Step-by-step explanation:

Limestone can either be chemical or organic. (Chemical if it forms when dissolved materials precipitate from solution and organic if it is from the accumulation of plant or animal debris). In this case, it is organic because it is formed from the accumulation of aquatic organisms.

Answer 2

An organic sedimentary rock.

Limestone can either be chemical or organic. (Chemical if it forms when dissolved materials percipitate from solution and organic if it is from the accumulation of plant or animal debris). In this case, it is organic because it is formed from the accumulation of aquatic organisms.