Schist
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GLENDALE COMMUNITY COLLEGE EARTH SCIENCE IMAGE ARCHIVE ASTRONOMY GEOLOGY METEOROLOGY MUSEUM TOUR PHS 120 PHS 120 ONLINE HOME Schist Pictures SCHIST Mica Schist - This schist clearly shows foliation as a layering in the rock. Upon closer inspection of the mica shows that the sheets are stacked in a very parallel manner. This is further indication of the the influence of pressure acting on the rock. Garnetiferous Mica Schist - Schists are often name according to the conspicuous minerals that it contains. Here garnet crystals are conspicuous. Muscovite Mica Schist - This schist displays crenulations caused by differential stresses. The foliation in a metamorphic rock forms parallel to these stresses. In this sample there was more than on direction of compressiona l force. Page 1 of 3 Schist 6/5/2006 file://D:\ILANK%20POENYA\BACKUP%20DATA%20ILANK\Literatur%20Batauan%20...
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GLENDALE COMMUNITY COLLEGE
EARTH SCIENCE IMAGE ARCHIVE ASTRONOMY GEOLOGY METEOROLOGY MUSEUM TOUR PHS 120 PHS 120 ONLINE HOME
SchistPictures
SCHIST
Mica Schist - This schist clearly shows foliation as a layering in the rock. Upon closer inspection of the mica shows that the sheets are stacked in a very parallel manner. This is further indication of the the influence of pressure acting on the rock.
Garnetiferous Mica Schist - Schists are often name according to the conspicuous minerals that it contains. Here garnet crystals are conspicuous.
Muscovite Mica Schist - This schist displays crenulations caused by differential stresses. The foliation in a metamorphic rock forms parallel to these stresses. In this sample there was more than on direction of compressional force.
Page 1 of 3Schist
6/5/2006file://D:\ILANK%20POENYA\BACKUP%20DATA%20ILANK\Literatur%20Batauan%20...
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Tourmaline Mica Schist - Note the sub parallel alignment of the tourmaline crystals. This is another example of foliation.
Schists represent a more elevated degree of heat and pressure that phyllites. Within the solid state, the micaceous minerals of the phyllite begin to rearrange their crystalline structure to form new minerals stable at higher temperatures and pressures. Foliation is still very evident by layering or the parallel alignment of mineral grains.
Here are some images of a field occurrence of Schist from the Buckeye Hills area of central Arizona.
Within this rubbly surface note the strike of parallel layers of schist.
Page 2 of 3Schist
6/5/2006file://D:\ILANK%20POENYA\BACKUP%20DATA%20ILANK\Literatur%20Batauan%20...
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This picture is of a small quarry about 100 feet south of where the above picture was taken.
This image is a close up of the main layer of schist that was worked in this area. The area around Buckeye Hills has numerous small scale workings like this one. The schist was used in the manufacture of joint compound for drywall.
Page 3 of 3Schist
6/5/2006file://D:\ILANK%20POENYA\BACKUP%20DATA%20ILANK\Literatur%20Batauan%20...
