Question

Which statement best describes an index fossil?

A. a fossil that can be used to establish the absolute age of a rock layer
B. a fossil which is formed in a soft sediment by the movement of an animal
C. a fossil of an insect captured in amber
D. a fossil of an animal captured in ice

Answer 1

dezznuts and i think it would be b because that would be your best answer

Answer 2

A. a fossil that can be used to establish the absolute age of a rock layer

Step-by-step explanation:

An index fossil happens when a plant or animal is preserved in the rock record of the Earth. It needs to be characteristic of a particular span of time or environment. For it to be really useful, the index fossil should be easily recognizable, abundant over a large area, and be present for only a short time period. Index fossils are the basis for defining boundaries in the geologic time scale and for the correlation of strata.