Limestone stromatolite |
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 Stromatolitic dolomitic limestoneBiogenous sedimentary rock.Dolomitic limestone displaying fossil algal stromatolite structure. A stromatolite is a calcareous mound built up of layers of lime-secreting cyanobacteria and trapped sediment. Devonian, Darby Formation, Wind River Mountains near Dubois, Wyoming. |
| https://gotbooks.miracosta.edu/rocks/sedimentary/19.html | 2/2/2021 |