plural of mold fossil

A fossil formed when sediment fills the inside or covers the outside of a dead organism and the organism's remains do not persist, leaving just the shape and texture of the rock to indicate the organic material that was there.

crude oil

Water that has remained in an aquifer for a long timespan, usually thousands or millions of years.

Damascus steel created from scrap damascus pieces.

(obsolete, geology) devil's corkscrew

An automobile powered by a fossil fuel.

Alternative form of nonfossil.

The collective record of biological development that is reflected in the fossilized remains of organisms through geological history. / The record of preserved evidence for a single species or taxon.

plural of fossil record