File:Calciocarbonatite (sovite) (Magnet Cove Carbonatite, mid-Cretaceous; Cove Creek, Hot Spring County, Arkansas, USA) 3 (14819497931).jpg

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Igneous calcite (left: 3.3 cm across; right: 3.6 cm across) - two large calcite rhombs from a Magnet Cove calciocarbonatite (sövite).

Central Arkansas has a famous “igneous limestone” unit called the Magnet Cove Carbonatite. The Magnet Cove is a mid-Cretaceous ring dike complex in the Arkansas Alkaline Province. The sample shown here is calciocarbonatite (a.k.a. sövite), dominated by the mineral calcite.

Age: late Albian to Cenomanian, mid-Cretaceous, 96-102 million years.

Locality: Cove Creek, northern Hot Spring County, central Arkansas, USA.
Date
Source Calciocarbonatite (sovite) (Magnet Cove Carbonatite, mid-Cretaceous; Cove Creek, Hot Spring County, Arkansas, USA) 3
Author James St. John

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This file is licensed under the Creative Commons Attribution 2.0 Generic license.
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This image was originally posted to Flickr by James St. John at https://flickr.com/photos/47445767@N05/14819497931 (archive). It was reviewed on 1 December 2019 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0.

1 December 2019

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current09:05, 1 December 2019Thumbnail for version as of 09:05, 1 December 20191,416 × 620 (120 KB)Ser Amantio di Nicolao (talk | contribs)Transferred from Flickr via #flickr2commons

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