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, ...
The weight of each new layer helped compress the ones below, eventually forming sedimentary rock over millions of years. Some 65 million years ago, molten rock from deep beneath the earth’s ...
Southwestern Ohio's limestone (a sedimentary rock) is saturated with life — life from about 450 million years ago, that is. Our local limestone layers reflect times of relative prosperity for the wide ...
What Was Happening on Earth at This Time The Precambrian is the earliest of the geologic ages, which are marked by different layers of sedimentary rock. Laid down over millions of years ...
Apex,' one of the most complete stegosaurus fossils ever found, is on display at the American Museum of Natural History.
These layers of sedimentary rock were deposited in Cambrian time, when another shallow sea covered this region. Among the fossilized remains found within these layers are brachiopods, trilobites ...
The notion that oil originates from the decomposition of dinosaurs has intrigued and fueled imaginations for decades. This ...