Ancient Life in Kansas Rocks, part 4 of 27
In this figure is what is known colloquially as an "algal biscuit." It is found as lumps or nodules on rock out-croppings, or weathered free, and represents masses of calcium carbonate secreted by marine plants. (Wellington Formation, Permian)
Kansas Geological Survey
Placed online Feb. 1997
URL = "http://www.kgs.ku.edu/Publications/ancient/f04_algal.html"
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