What are the two forms of calcium carbonate precipitated by living organisms?
W)Calcite and aragonite
X)Hematite and bauxite
Y)Calcite and Silicate
Z)Nacrite and feldspar
Answer: W
What are the two forms of calcium carbonate precipitated by living organisms?
W)Calcite and aragonite
X)Hematite and bauxite
Y)Calcite and Silicate
Z)Nacrite and feldspar
Answer: W