Petrified Forest, as its name suggests, is home to Arizona's state fossil: petrified wood, the fossils of trees. Over time, the wood from the trees hardened and crystallized.

Fossils of microbes, sea sponges, insects, sharks, early amphibians and mammals have been discovered in the rocks around the state, representing over 1 billion years of life on Earth.

Fossils are all around you at parks and public land across the state, you just need to know what to look for. There are 22 park units in Arizona with paleontological resources, according to the ...

Amateur fossil hunters found the only known Sonorasaurus specimen in the world in southern Arizona in ... Arizona has no official state dinosaur, so an 11-year-old proposed one — the Sonorasaurus.

Ramón Arrowsmith, Arizona State University This is the fourth in a five-part series written by experts featured in the Smithsonian's new Hall of Fossils—Deep Time exhibition, now on view at the ...

Fossils of microbes, sea sponges, insects, sharks, early amphibians and mammals have been discovered in the rocks around the state, representing over 1 billion years of life on Earth.