Law of fossil succession strata dating


27-Dec-2019 15:37

The oldest known animal fossils, about 700 million years old, come from the so-called Ediacara fauna, small wormlike creatures with soft bodies.

Numerous fossils belonging to many living phyla and exhibiting mineralized skeletons appear in rocks about 540 million years old.

On rare occasions some body parts—particularly hard ones such as shells, teeth, or bones—are preserved by being buried in mud or protected in some other way from predators and weather.The transitional forms are well preserved as fossils, as are many other kinds of extinct horses that evolved in different directions and left no living descendants.