Friday Rock Blogging: Died for Your Sins Edition

Look at the pretty things made from dead marine micro- and meio-organisms! First, a ridge of limestone formed from crushed-up foraminifera:

Oligocene foraminiferite, Morcate, Cuba

Second, a couple pretty laminated diatomites:
laminated diatomite and diatomaceous shale with ash bed and drag fold laminated diatomite and diatomaceous shale

Third, partial silica replacement of a foram shell in a porcelanite matrix:
chalcedony and quartz filling a foram shell in porcelanite


  1. Sabine wrote:


  2. Heading Out wrote:

    Well it’s better than what Ghawar is made of!

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