File:Calciocarbonatite (sovite) (Panda Hill Carbonatite, Early Cretaceous; ~113 Ma; Panda Hill, southwestern Tanzania, eastern Africa) (14636059059).jpg

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Panda Hill Carbonatite (field of view 5.2 cm across) from Panda Hill, ~25 km SW of Mbeya, between Lake Rukwa & Lake Nyasa, southwestern Tanzania, eastern Africa (08º 59’ 30” South, 33º 14’ East).

The Panda Hill Carbonatite (a.k.a. Mbeya Carbonatite) intruded through Proterozoic quartz-feldspar gneisses, which have been significantly altered as a result. Quartzo-feldspathic country rocks that have been contact metamorphosed by carbonatite intrusions are called fenites. The resulting country rocks are said to be fenitized. This Panda Hill rock is calcitic, so it's called a calciocarbonatite (a.k.a. sövite). The Panda Hill intrusion dates to about 113 million years (Aptian Stage, late Early Cretaceous).
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Source Calciocarbonatite (sovite) (Panda Hill Carbonatite, Early Cretaceous; ~113 Ma; Panda Hill, southwestern Tanzania, eastern Africa)
Author James St. John

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This image was originally posted to Flickr by James St. John at https://flickr.com/photos/47445767@N05/14636059059 (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 20191,117 × 611 (120 KB)Ser Amantio di Nicolao (talk | contribs)Transferred from Flickr via #flickr2commons

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