Rocks are categorized into three main types: igneous, sedimentary, and metamorphic. There are over 4,000 identified minerals on Earth. Common rocks include granite, basalt, limestone, and sandstone.

Sometimes sedimentary rocks are disturbed by events ... fossil sites across large discontinuous areas. Some minerals in rocks and organic matter (e.g., wood, bones, and shells) can contain ...

Curious Kids is a series for children of all ages. If you have a question you’d like an expert to answer, send it to [email protected]. Why don’t rocks burn? – Luke, age 4, New Market, ...

5 Cementation In the final process of sedimentary rock formation, some of the minerals in the sediment harden and form a kind of cement which sticks the grains of the rock together. This is a ...

For example, marble is created when limestone is pressure-cooked within the earth, causing the minerals that compose the stone to re-form into new crystals. Sedimentary rock is formed by the ...

Sedimentary rock covers 75-80% of the Earth's crust ... rocks that make up the soil parent material (Table 1). Primary minerals form at elevated temperatures from cooling magma during the original ...

The Science Education Center houses thousands of rock and mineral samples in what is known as "The Rock & Mineral Room." The entire collection can be viewed by clicking on each of the virtual drawers ...