BETA

Monks Park

Submitted by Raven Mueller on Thu, 2014-07-10 09:54
Stone Type (Commercial): 
Description: 

Several quarries exist for this stone. Actual quarry for specimen unconfirmed.

Availability: 
Available
Physical Data
Color: 
Munsell Color(s): 
Absorption (%): 
10.30
Density (lb/cf): 
128.90
Flexural Strength, Dry (psi): 
667
Compressive Strength, Dry (psi): 
4,249
Geology
Stone Type (Lithologic): 
Chronostratigraphy: 
Grain Shape: 
Subrounded
Well-Rounded
Grain Sorting: 
Poorly-Sorted
Grain Size: 
Medium
Petrographic Description: 

Specimen: 2014-051
This is a fossiliferous limestone. The limestone is grain supported with a sparite cement matrix, with some instances of syntaxial overgrowth. Allochem constitute about 70 percent of slide area. These criteria define the limestone as a grainstone. Allochem composition is about 80 percent ooid and 20 percent bioclast. These estimates and the degree of sorting indicate the limestone is classified as a sorted oosparite. Micritic envelopes are common on bioclasts. Bioclasts are predominantly bivalve and brachiopod fragments with a maximum dimension around 2 mm and a modal size range near .5 to 1 mm. Echinoderm parts are also identifiable with a maximum dimension near 1 mm. Ooids are extremely well formed with manifest laminar structure and easily discernable nuclei. Maximum ooid size is near 1 mm and a modal size around .4 to .7 mm. Many ooid nuclei are fossiliferous, likely of the same types described above. Most ooids are significantly stained by iron hydroxides, imparting a yellowish color to the hand sample. There is a channel filled with consertal calcite that crosses the width of the slide. The channel has a maximum dimension of approximately 2 mm. Extant voids are essentially absent, but the blue staining of ooids from the impregnation process suggest the iron hyrdorxide heavy rinds are porous. Individual ooids are barely visible without magnification in the hand sample. Lithification seems to have occurred prior to significant compaction.
MP 7/21/2015

Images

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Specimen ID
2014-051 Image of specimen in dry conditions. Finish: download image Image of specimen in wet conditions. Finish: download image

Thin Sections

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Specimen ID Non-polarized Cross-polarized
2014-051 Specimen shown in non-polarized light.download image Specimen shown in cross-polarized light.download image

Quarry

NOTE: Quarry locations are approximate.

Monks Park Quarry
Neston , Wiltshire
United Kingdom
51° 24' 51.9984" N, 2° 10' 36.9984" W
Wiltshire GB

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