Iran's folded rocks are a colorful formation that is part of the Greater Caucasus mountains, which formed when the Eurasian ...

Whether sedimentary rocks store fossil hydrocarbons or act as impermeable layers to prevent the rise of oil, natural gas or ...

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, ...

Sedimentary rocks are formed by small rock pieces which are transported by rivers and laid down in layers. Chalk is a sedimentary rock. Metamorphic rocks are formed when another rock is under heat ...

New radioisotopic datings of volcanic fossil sites are helping researchers unravel the evolution of mammals. The University ...

If Mars harbored life in its early history, fossils might be found within such sedimentary rock layers, according to planetary researchers. NASA plans to send numerous rovers and satellites to ...

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 ...