The rocks found in Greenland with carbon isotope ratios suggestive of life are
A) igneous
B) sedimentary
C) metamorphic
D) a mixture of sedimentary and metamorphic

Question

Quizplus · Accepted Answer

Carbon isotope ratios are typically used to identify organic matter in sedimentary rocks, which are formed from the accumulation of sediment and organic material. Igneous rocks are formed from solidified magma, which does not typically contain organic material. Metamorphic rocks are formed from the alteration of other rocks by heat and pressure, which can alter or erase any evidence of organic material. Therefore, the most likely option is that the rocks with carbon isotope ratios suggestive of life are sedimentary.

The Rocks Found in Greenland with Carbon Isotope Ratios Suggestive