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Wausau Red Granite

Submitted by Intern on Tue, 2015-03-10 10:37
Stone Type (Commercial): 
Availability: 
Available
Geology
Stone Type (Lithologic): 
Grain Shape: 
Angular
Grain Size: 
Very Coarse
Medium
Petrographic Description: 

Specimen: 2014-087-1
This sample is a plutonic rock dominated by mostly anhedral phaneritic feldspar and quartz. The crystalline structure is coarse. Maximum crystal dimension is 6.4 mm (quartz). There is not a clear mode to crystal size, but most are between 1 and 4 mm. Polysynthetic is the most prevalent twinning pattern. Grain boundaries range from smooth curving to consertal sutured. Stress induced wave extinction in quartz is common. Stress induced grain nucleation has produced small aplitic quartz crystals around most larger quartz grains. Microperthitic intergrowth textures are extremely common in feldspars. Accessory minerals are quite rare and comprise less than 5 percent of slide area. Biotite is the most common and opaques are also present. Alteration minerals of mafic components includes chlorite, iron oxides and hydroxides, and smectite clays. There are slight signs of incipient weathering of feldspars with many grains presenting a dusty look. Sericitization is minimal.
MP 9/4/2015

Specimen: 2014-087-2
This sample is a plutonic rock dominated by mostly anhedral phaneritic feldspar and quartz. The crystalline structure is coarse. Maximum crystal dimension is 5.6 mm (quartz). There is not a clear mode to crystal size, but most are between 1 and 3.5 mm. Polysynthetic is the most prevalent twinning pattern, Carlsbad is also common. Grain boundaries range from smooth curving to consertal sutured. Stress induced wave extinction in quartz is common. Stress induced grain nucleation has produced small aplitic quartz crystals around many of the larger quartz grains. Microperthitic intergrowth textures are extremely common in feldspars. Accessory minerals are quite rare and comprise less about 3 to 5 percent of slide area. Biotite is the most common and opaques and muscovite are present in trace amounts. Alteration minerals of mafic components includes chlorite, iron oxides and hydroxides, and smectite clays. There are slight signs of incipient weathering of feldspars with many grains presenting a dusty look. Sericitization is minimal. Small cracks that cross multiple grains filled with smectite and iron oxides/hydroxides are fairly common.
MP 9/4/2015

Images

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Specimen ID
2014-087-1 Image of specimen in dry conditions. Finish: download image
2014-087-2 Image of specimen in dry conditions. Finish: download image

Thin Sections

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Specimen ID Non-polarized Cross-polarized
2014-087-1 Specimen shown in non-polarized light.download image Specimen shown in cross-polarized light.download image
2014-087-2 Specimen shown in non-polarized light.download image Specimen shown in cross-polarized light.download image

Quarry

No quarry information available for this stone.

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