Tennessee Cedar

Submitted by Ed FitzGerald on Mon, 2014-11-24 10:20
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Physical Data
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Specimen: 2014-068
This sample is a fossiliferous limestone that may have undergone some low grade metamorphism. The matrix is sparite. Presently identifiable allochems are wholly bioclasts and constitute about 20 percent of slide area. Prior to substantial recrystallization allochem contribution was likely significantly higher. The limestone would be classified as a grainstone. Bioclasts are predominantly bryozoans with a maximum dimension of 4.5 mm and a modal range around 2 mm. Echinoderm fragments are also common but mostly only identifiable by iron mineral relicts that outline the original form in substantially syntaxially overgrown grains. Rare brachiopod and possible bivalve fragments are also present. Crystals of sparite presently mostly consertal edges, but euhedral edges are not uncommon. Maximum grain size is around 4.5 mm and the modal range is between 1.5 to 2.5 mm. Cracks .02 to .05 mm wide along many grain boundaries have infilled with iron hydroxides and oxides. Larger, but rare, interparticle channels are also filled with this material and have a maximum width of .15 mm and lengths under 1.5 mm. Twinning in sparite is extremely common. Aside from the aforementioned iron minerals, accessory minerals are essentially absent. There is no macrostructure bedding visible in this thin section. The hand sample also appears to be a relatively unstructured heterogeneous mix.
MP 9/4/2015


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Specimen ID
2014-068 Image of specimen in dry conditions. Finish: download image

Thin Sections

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Specimen ID Non-polarized Cross-polarized
2014-068 Specimen shown in non-polarized image Specimen shown in cross-polarized image


NOTE: Quarry locations are approximate.

Endsley Quarry
343 West Vinegar Valley Road
37737 Friendsville , Tennessee
United States
35° 45' 13.8852" N, 84° 7' 53.904" W
Tennessee US

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