Minerals are naturally occurring, solid, and inorganic substances that have a definite chemical composition (or range of compositions) and a regular internal atomic arrangement. Southwestern Ohio's ...

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, ...

Minerals are chemical compounds which occur naturally ... Marble is formed from limestone (a sedimentary rock) and contains tiny interlocking grains. This makes it very smooth and can be polished ...

Limestone is a sedimentary rock, and its fossils provide a unique time stamp. Unlike chemical analyses, which might be ...