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A compound coral head with crowded prismatic corallites. The specimen represents a worn pebble, formerly a part of a larger head.
GalleriesCorals and Sea Anemone
Amadeus W. Grabau A Textbook of Geology (Boston: D.C. Heath & Co., 1920) 285
2070×2400, 1.5 MiB
883×1024, 196.9 KiB
552×640, 104.6 KiB
276×320, 37.2 KiB