Found these oddly flat rocks, not sure if they're fossils? Thank

6 Really Strange Things That Fossilized - Owlcation

Stories in Stone - Big Bend National Park (U.S. National Park Service)

Strange Bull-Dog Faced Dinosaur Fossil is Discovered in Egypt, Latest Science News and Articles

The Weird Natural Rock Art of Lake Baikal » Explorersweb

Some of Earth's first animals—including a mysterious, alien-looking creature—are spilling out of Canadian rocks, Science

Burning Fossil Fuels Almost Ended All Life on Earth - The Atlantic

Can Anyone Tell Me If This Is Fossilized Bone, Or Just A Cool Rock?

Mississippian Crinoid fossil mid/small plate Pitkin Limestone Arkansas rare find

Fossil Crates

World's oldest fossils found on ancient sea bed could hold important clues in search for alien life - Mirror Online