File:Calcrete paleosol (top of Cockburn Town Member, Grotto Beach Formation, Upper Pleistocene; inland roadcut, southeastern San Salvador Island, eastern Bahamas) 1 (15226892101).jpg

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Calcrete paleosol (13 cm across) - calcretes are a common type of paleosol in San Salvador Island’s bedrock. Calcretes are lithified soil horizons, and are composed of calcium carbonate (CaCO3). Calcretes are (& were) hard as rock, but they are still soil horizons. Calcretes are extreme forms of pedocal soils, and are often developed on carbonate platform islands. This Late Pleistocene calcrete is developed above an aeolian calcarenite unit (a wind-deposited limestone composed of sand-sized calcareous grains).

The upper surface of the calcrete has a somewhat smoothed nodular nature. The underside (see photos elsewhere in this album) has cemented lime sand, vegemorphs/rhizocretions, a pisolite, a fossil Tectarius snail shell, and three fossil Cerion land snail shells.

Stratigraphy - paleosol capping eolian calcarenites at the top of the Cockburn Town Member, Grotto Beach Formation, Upper Pleistocene

Locality: inland roadcut, southeastern San Salvador Island, eastern Bahamas
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Source Calcrete paleosol (top of Cockburn Town Member, Grotto Beach Formation, Upper Pleistocene; inland roadcut, southeastern San Salvador Island, eastern Bahamas) 1
Author James St. John

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This image was originally posted to Flickr by jsj1771 at https://www.flickr.com/photos/47445767@N05/15226892101. It was reviewed on 3 May 2015 by FlickreviewR and was confirmed to be licensed under the terms of the cc-by-2.0.

3 May 2015

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current21:50, 3 May 2015Thumbnail for version as of 21:50, 3 May 20152,997 × 1,836 (1.7 MB)Natuur12 (talk | contribs)Transferred from Flickr via Flickr2Commons

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