• Sreepat Jain
Part of the Springer Geology book series (SPRINGERGEOL)


The Graptolites (grapto = write, lithos = stone) are very small (<1 cm) extinct planktonic and colonial forms (inference based on shape of colonies, theca, and their recovery from deep “bottom” deposits).


Black Shale Nerve Cord Colonial Form Gill Slit Successive Fauna 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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© Springer India 2017

Authors and Affiliations

  1. 1.New DelhiIndia

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