Common Fossils Did you know? Fossils must usually be at least 10,000 years old to be considered fossils!

Brachiopods Bi-valve shell, two pieces

Cephalopod Centered spiral shell, examples Ammonites, Nautilus shells Ammonite cast from North Texas Cephalopod shell and cast have been replaced by iron pyrite minerals

Teeth A full mammoth tooth may be prized by collectors, but is not very valuable when compared to a mammoth tusk! Shark teeth are common fossils in North Texas. This one was found in Midlothian, TX

Gastropods Off center spiral shells, like a snail shell /geology-resources/gastropods By Scanned by Tom Meijer - Nyst, P.H., Conchyliologie des terrains tertiaires de la Belgique. -- Ann. Mus. r. Hist. nat. Belg., 3: (1878), 28 pls. (1881)., Public Domain,

Trilobites!

Echinoderm Sea urchins are common North Texas fossils You probably have some in your driveway Lower Cretaceous Echinoderm Enallaster Texamus Comanche Beds, Texas But they probably look more like these, but maybe not quite as clear.

Petrified Wood literally "wood turned into stone") is the name given to a special type of fossilized remains of terrestrial vegetation. It is the result of a tree or tree-like plants having completely transitioned to stone by the process of permineralization. Petrified Palmwood is the State Rock of Texas

Coral Another common North Texas fossil is Coral It can have many shapes and sizes