The settlement is built on a large amount of igneous rock.

Ages of the igneous rocks range from 70 to 74 million years.

Intrusions are one of the two ways igneous rock can form.

He noted significant problems with the current classification systems for igneous rocks.

Ages of these igneous rocks fall in the interval 25 to 28 million years.

Here, the main type of igneous rock that can be found is Granophyre.

Igneous rocks make up over 90% of the Earth's crust by volume.

Evolved igneous rocks are much less common on cold, dead bodies such as the Moon.

These igneous rocks are some 390 million years old.

Crystal shape is also an important factor in the texture of an igneous rock.