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

2. Brachiopods Bi-valve shell, two pieces http://skywalker.cochise.edu/wellerr/students/brachiopod/project.htm

3. Cephalopod Centered spiral shell, examples Ammonites, Nautilus shells https://www.uky.edu/KGS/fossils/cephalopods.htm Ammonite cast from North Texas Cephalopod shell and cast have been replaced by iron pyrite minerals http://earthphysicsteaching.homestead.com/Cretaceous_Ammonites.html

4. Teeth A full mammoth tooth may be prized by collectors, but is not very valuable when compared to a mammoth tusk! http://www.angelfire.com/mi/dinosaurs/images/casts/mammoth_skull_bc.jpg Shark teeth are common fossils in North Texas. This one was found in Midlothian, TX http://txfossils.com/TFVertibrae.html

5. Gastropods Off center spiral shells, like a snail shell https://www.isgs.illinois.edu/outreach /geology-resources/gastropods By Scanned by Tom Meijer - Nyst, P.H., 1878-1881. Conchyliologie des terrains tertiaires de la Belgique. -- Ann. Mus. r. Hist. nat. Belg., 3: 1-262 (1878), 28 pls. (1881)., Public Domain, https://commons.wikimedia.org/w/index.php?curid=6113367

6. Trilobites!

7. Echinoderm Sea urchins are common North Texas fossils You probably have some in your driveway Lower Cretaceous Echinoderm Enallaster Texamus Comanche Beds, Texas http://www.geology.19thcenturyscience.org/ But they probably look more like these, but maybe not quite as clear.

8. 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 http://www.petrifiedwoodmuseum.org/OligoLouIntroduction.html http://www.trailspace.com/forums/trip-reports/topics/138918.html

9. Coral Another common North Texas fossil is Coral It can have many shapes and sizes http://txfossils.com/TFCoral.html