The basalt which makes up the Giant’s causeway is an igneous rock. Sedimentary rocks are formed by small rock pieces which are transported by rivers and laid down in layers. Chalk is a ...

What FACTS ABOUT ROCKS do you know? They are abundant on earth, and yet little is known about them. These facts will increase your knowledge of the rocks.

Composition of the atmosphere The ... Rock types There are three types of rocks on Earth, igneous, metamorphic and sedimentary. These are formed in different ways and have different properties.

Petrology is the study of the macroscopic and microscopic mineralogical and chemical composition of rocks. In addition to assessing sedimentary, igneous, and metamorphic rocks that are accessible ...

The composition of the magma ... Geodes typically have a hollow cavity lined with crystals. They form in sedimentary rocks ...