You pick up a sandstone.In the rock sample you see an impression of a sea shell in the rock.This type of fossil is a ________.

Question

Quizplus · Accepted Answer

A mold is a type of fossil that forms when an organism is buried in sediment and then dissolved, leaving behind an impression of its shape. In this case, the sea shell left behind an impression in the sandstone, creating a mold. A cast is formed when mineral deposits fill in the mold, creating a 3D replica of the original organism. A permineralized fossil occurs when minerals seep into the pores of the organism and fill in the spaces, preserving it in solid rock. A pseudofossil is a mineral formation that resembles a fossil but was not formed by a living organism.

You Pick Up a Sandstone