Compare and contrast the deep igneous of Wisconsin with that of the Pacific Northwest in terms of age and composition.

Wisconsin:

Common igneous rocks found in Wisconsin include: granite, diorite, syenite and gabbo.

Granite is the most common igneous rock of the Wisconsin, while others are present in significant amounts.

The igneous rocks in Wisconsin are some of the oldest rocks and are found near the surface; they age range from approximately 1 billion to about 2.8 billion years.

Pacific Northwest:

The Pacific Northwest of the United state has a variety of active tectonic settings which resulted from volcanic eruptions.

Basalt is one of the most abundant igneous rock of the Pacific Northwest, and it is dating back from 17 million years ago.

Explanation:

Bedrock formations are usually divided into three distinctive groups: igneous rocks, sedimentary rocks and metamorphic rocks. Igneous rocks are formed from magma that solidified after cooling. Igneous rocks have crystalline structure that range from very course to very fine.