Paleonet: Unknown Permian spheres

Woods, Adam awoods at Exchange.FULLERTON.EDU
Tue Jun 9 13:52:45 GMT 2015

This is early marine cement coating grains (calcispheres and a fusilinid or possibly an ostracod).  The cement looks to have originally been aragonite based on the fibrous nature of the crystals, although the cement in the lower right photo could be low-Mg calcite based on its overall brightness and more blocky nature of the cement.


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On Jun 8, 2015, at 6:54 PM, 黄浩 <geohaohuang at<mailto:geohaohuang at>> wrote:

Dear colleagues,

I came across some unknwon spheres in thin sections of Permian carbonates.They look lovely and intrigues me. Would anyone have any idea what they might be and whether they can signify any particular sedimentary condition? Thanks in advance.

Please open this URL for the pics of these mysterious spheres:

Best regards!

Sincerely yours,

Assistant Researcher
Institute of Geology, Chinese Academy of Geological Sciences
26 Baiwanzhuang Road, Beijing, 100037, China
Tel: 86-10-68999885

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