Two hundred and thirty million years ago, in what's now Wyoming, the seasons were dramatic. Torrential rain would pelt the ...

Using the principle of faunal succession, if an unidentified fossil is found in the same rock layer as an index fossil, the two species must have existed during the same period of time (Figure 4).

Mudstone, shale, and limestone are examples of sedimentary rock likely to contain fossils. As the layers of sediment build up on top of one another, they create a physical timeline. The oldest layers, ...

And since fossils don't exist in a vacuum, when it's said these fossils span across the continents, it means their rock layers do as well. "It is a combination of this biological and geological ...

both: Are preserved in rocks. - You took the words out of my mouth, Tiny. Now, remember, Fossil Hunters, look in the layers of sediment-- the older, broken-apart rocks. That's where the fossils are.

The notion that oil originates from the decomposition of dinosaurs has intrigued and fueled imaginations for decades. This ...

Everyone has a past. That includes the millions of species of insects, arachnids, and nematode worms that make up a major ...

Foote's mineral specimens are very valuable. Formation - A formation is a set of rock layers that consists dominantly of a certain rock type or combination of types. Fossiliferous Limestone - ...

Smith's colourful and sophisticated geological map was based on his astute observation that rock layers (strata) could be identified by the fossils they contain. He noticed that the layers always ...

Together, retired earth science teachers Eugene Genova and Ron Russ travel far and wide searching for fossils.

Most of the fossils that we find in Earth's crust are preserved in sedimentary rock, where layers of mineral cover an ...