BETA

Mountain White

Submitted by Ed FitzGerald on Mon, 2014-11-24 10:46
Trade Name Alias: 
Stone Type (Commercial): 
Description: 

Gray diagonal veins. Medium to heavy veining. Very white background coming from the Brook Layer of the Danby Quarry.

Availability: 
Available
Physical Data
Absorption (%): 
0.08
Density (lb/cf): 
170.40
Flexural Strength, Dry (psi): 
1,854
Modulus of Rupture, Dry (psi): 
2,029
Compressive Strength, Dry (psi): 
8,580
Bulk Specific Gravity: 
2.73
Abrasion Resistance: 
11.30
Geology
Stone Type (Lithologic): 
Grain Shape: 
Angular
Grain Size: 
Medium
Petrographic Description: 

Specimen: 2014-075-1

This sample is a moderately coarse grained marble. The texture is overall granoblastic with random grain orientation. Maximum carbonate grain size is around 1.5 mm, minimum is .1 mm, the modal size is .6 to 1.2 mm. Grain boundaries are mostly curved or straight with a lesser amount of sutured boundaries. Twinning lamellae in carbonates are common. The most abundant non-carbonate accessory mineral is quartz, which occurs as individual minerals and as aggregates. Maximum quartz crystal size is .8 mm; most are significantly smaller. Platy minerals, likely muscovite or phlogopite, are also common and occur individually and in aggregates with quartz, very fine grained feldspars (albite twinning), and sphene. Other low birefringence minerals may also be present in these aggregates. Opaques are also present in trace amounts in aggregates and as individual crystals. All non-carbonate accessory minerals constitute approximately 30 percent of slide area. Quartz comprises approximately 60 to 70 percent of these accessory minerals. Accessory mineral aggregates form sub-parallel bands. Maximum band width is 1 mm and length is 8 mm. Diffuse banding is also visible in the hand sample. There is no appreciable weathering in this sample.
MP 9/4/2015

Specimen: 2014-075-2
This sample is a moderately coarse grained marble with a somewhat diverse chemical composition. The texture is overall granoblastic with random grain orientation. Maximum carbonate grain size is about 1.25 mm, minimum is .1 mm, and the modal size is .8 to .4 mm. Grain boundaries are mostly curved or straight with a lesser amount of sutured boundaries. Twin lamellae in carbonates are common. Non-carbonate accessory minerals minimally include quartz, amphiboles (richterite?), micas (muscovite, phlogopite and others?), sillimanite, opaques, sphene, and possibly brucite and other low birefringence minerals. The most common are individual and small aggregates of quartz, many reflecting strain induced nucleation. Maximum quartz crystal size is around .3 mm. Most other non-carbonate accessory minerals are present in fine grained ground masses. The small size of most crystals precludes definitive identification of all minerals. Amphiboles are an exception, with some crystals as large as .7 mm. Opaques are also relatively large with a maximum dimension of .45 mm. All non-carbonate accessory minerals constitute about 10-20 percent of slide area. Accessory minerals produce a diffuse banding in the thin section. Diffuse banding is also visible in the hand sample. There is no weathering apparent in this sample.
MP 9/4/2015

Images

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Specimen ID
2014-075-1 Image of specimen in dry conditions. Finish: Polisheddownload image
2014-075-2 Image of specimen in dry conditions. Finish: Honeddownload image

Thin Sections

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Specimen ID Non-polarized Cross-polarized
2014-075-1 Specimen shown in non-polarized light.download image Specimen shown in cross-polarized light.download image
2014-075-2 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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