![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjlXL1olsPgJNk1ZG_tCtkOyOPjyqjFFvPW_qpIwgDHHLUBu4BfrJzMJqq9-ntiHB8PddI6vqsxzDrbjo7slBj9tHvq21Rhz24pqesBx4YB0wFTtTPWCTQgxTOG6_vgsXSs84ukItGK1__S/s320/15668+9030+2010_09_02_2337+foram+in+ooid.jpg)
An ooid, a concentrically laminated calcium carbonate spheroid, formed inorganically by wave action around a pre-existing nucleus. The nucleus in this case is the microscopic shell of an amoeba called a foraminiferan. Just so you know.
A tiny box without key or lid
inside a chambered treasure hid
its maker dead and long forgot
yet carbon saved so we aren't hot
Doggerel again, I'm afraid.
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