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Glossary of Terms & Definitions
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

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GNEISS - A coarse-grained metamorphic rock, composed of alternating light and dark bands, formed at very high temperatures and pressures. Pronounced "Nice".

Also see: METAMORPHIC, ROCK

Usage in context:

Pinto Gneiss, Joshua Tree National Park
Pinto Gneiss in the Pleasant Valley, Joshua Tree National Park.

Lichens, Pinto Gneiss, Joshua Tree National Park
Lichens growing on Pinto Gneiss in the Pleasant Valley, Joshua Tree National Park.

Geology Tour Road
Pinto Gneiss, formed 1.7 billion years ago was intruded by molten magma 85 million years ago, which then cooled forming White Tank monzogranite. ...

Rock Piles
The monzogranite forming these rock piles was once a molten mass which was forced upward, or intruded, into an older layer of Pinto Gneiss. ...

Grand Canyon natural environments
Geologic formations such as gneiss and schist found at the bottom of the Canyon date back 1800 million years. This geologic incline creates a diversity of ...

General Geologic History - Mojave Preserve - California Mojave Desert
Ancient metamorphic rocks (consisting of amphibolite schist and gneiss with granitic dikes and intrusions) are some of the oldest rocks in the region. ...

Debris flow and canyon formation - Joshua Tree National Park
Occuring at the mouth of this steep canyon in the Hexie Mountains, are irregular mounds of gneiss debris lacking a coating of patina. ...

Geology tour, Arch Rock, Joshua Tree National Park
This rock is known as Pinto Gneiss and it lies on top of the lighter colored White Tank Granite. Look closely and you can see the actual zone where the ...

Pleasant Valley - Joshua Tree National Park
The Hexie Mountains were pushed up from the northern branch of the fault to form the steep, straight southern edge of this range of gneiss. ...

Crystalline Basement Rock
This 1.7 billion year old gneiss is the oldest rock found in the Death Valley region. It was formed underground when crustal rock was changed, ...

Malapai Hill - Joshua Tree National Park
... at two or three million years ago; which is quite recent when compared to the age of monzogranite at 85 million years, and gneiss at 1.7 billion years. ...

Joshua Tree National Park
Washes, playas, alluvial fans, bajadas, pediments, desert varnish, granites, aplite, and gneiss interact to form a giant desert mosaic of immense beauty and ...

Natural Science: Joshua Tree
The granite crystallized from magma deep within the Earth, which forced its way into the gneiss 85 million years ago. Here, where the two rocks touch, ...

Rockpiles in Joshua Tree
One set, oriented roughly horizontally, resulted from the removal, by erosion, of the miles of overlying rock, called gneiss. Another set of joints is ...

Pinto gneiss, Pleasent Valley - Joshua Tree National Park
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