Identifying Granitoids and Other Granite Rocks

How geologists sort out granite from the rocks that look like it.

More on identifying rocks & minerals

Rock types! If you are not sure what kind of rocks are near you, the first thing to do is contact your state Geological Survey. You can order geologic maps of almost

The Geologic Story of Yosemite National Park

In contrast to granitic rocks, quartz diorite, diorite, and gabbro contain mostly plagioclase and dark minerals, with little or no quartz or potassium feldspar (figs


Granodiorite (pronunciation: / r æ n o d a r a t, -n -/) is a phaneritic-textured intrusive igneous rock similar to granite, but containing more

Composition of the crustChemical elements,

Illustrated overview of the most widespread chemical elements, minerals, and rock types in the Earth's crust.

Yosemite National Park

Yosemite National Park Rocks. The vast majority of Yosemite is comprised of plutonic igneous rocks. Plutonic rocks forms deep underground when molten rock cools and

Glossary of geologyWikipedia

A. Abyssal plainFlat or very gently sloping areas of the deep ocean basin floor. Absolute datingthe process of determining a specific date (in years or some

Granite: Igneous RockPictures, Definition & More

Granite: The specimen above is a typical granite. It is about two inches across. The grain size is coarse enough to allow recognition of the major minerals.

List of MineralsSandatlas

List of the Rock-Forming Minerals with Pictures, Chemistry, and Links to Separate Articles about each Mineral Species.

Colorado RocksDomain Index for

Colorado Geology Photojournals A Tribute to Colorado's Physical Past and Present Right: Trees and snow mark major Laramide uplifts in green and white while salmon

Relative Mining Equipments