Rocks

By: Destiny Diciccio

What is a rock?

Rocks are

the solid mineral material forming part of the surface of the earth and other similar planets, exposed on the surface or underlying the soil or oceans. There are many different types of rocks in the world and many come in different shapes and sizes. Some names of rocks would be igneous rock , sedimentary rocks , metamorphic rocks and etc. Rocks come in all different grain sizes and textures and are formed from many places including the ocean and volcanoes.

Sandstone

- Sandstone is Inorganic

- Mostly clay minerals

-Fine to coarse

- Sand (0.006 to 0.2 cm)

- Clastic (Fragmental)

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Marble

- Nonfoliated

- Fine to coarse

- Calcite and/ or dolomite

- Regional or contact

- Metamorphism of limestone or dolostone

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Basalt

- Extrusive

- Fine and Non - Vesicular

- Less than 1 mm

- Color is darker , Density is higher , and composition is rich in Fe, Mg.

- 75% Plagioclase Feldspar , 40% Pyroxene , and 25% Olivine