BETA

Indiana Gray

Submitted by Raven Mueller on Wed, 2014-07-09 09:09
Stone Type (Commercial): 
Availability: 
Available
Physical Data
Color: 
Munsell Color(s): 
Absorption (%): 
7.50
Flexural Strength, Dry (psi): 
700
Compressive Strength, Dry (psi): 
4,000
Geology
Stone Type (Lithologic): 
Grain Shape: 
Subrounded
Rounded
Grain Sorting: 
Poorly-Sorted
Grain Size: 
Coarse
Medium
Petrographic Description: 

Specimen: 2014-023-1 This specimen is a fossiliferous limestone. The limestone is grain supported and has a sparite cement matrix, much of it originating as syntaxial overgrowth. Allochems constitute about 75 percent of slide area. These criteria define the limestone as a grainstone. Allochem composition is about 90 percent bioclast and 10 percent ooid. These estimates classify this limestone as an unsorted biosparite. Most all bioclasts have thick micritic envelopes often times over .05 mm. Identifiable bioclasts are mostly echinoderm parts; bivalve, brachiopod, and bryozoan parts are also identifiable. Maximum dimension of echinoderms is approximately 1.25 mm and the modal range is about .5 to .75 mm. Maximum dimensions of less common bioclasts are as follows: bryozoan 1.25 mm, brachiopod 2.5 mm, and bivalve 2.5 mm. Ooid maximum size is .5 mm, minimum is .15 mm, and the modal range is around .25 mm. Extant voids are rare at far less than 1 percent of slide area and are interparticle. The degree of allochem preservation and sorting indicate this limestone was lithified before significant compaction. There is no visible macro-structure in this specimen. MP 7/21/2015

Images

Thin Sections

Click thumbnail for larger image.
Specimen ID Non-polarized Cross-polarized
2014-023-1 Specimen shown in non-polarized light.download image Specimen shown in cross-polarized light.download image
2014-023-2 No image available.

Quarry

NOTE: Quarry locations are approximate.

Central Quarry
301 Main St.
47451 Oolitic , Indiana
United States
38° 54' 36.4608" N, 86° 31' 50.628" W
Indiana US

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