ナショナルジオグラフィックのインスタグラム(natgeo) - 2月21日 16時13分

@Robert Clark "Uintacrinus is an extinct seafaring crinoid from the Cretaceous Era found in Kansas. Its odd discovery location suggests a massive change in the planet's climate and topography to cause Kansas to transform from a lush ocean seascape to what we know today. Uintacrinus lived floating along the ocean floor sifting for drifting food particles with its ten six foot arms. This particular group of Uintacrinus floated together with the tides overtime causing them to clump together into a loose colony, using their arms to link together. Colonies of this sort could reach into the hundreds and although the cause of death for this particular herd is unknown it is speculated that they died almost in unison, either from volcanic ash or disease. Whatever force of death took this colony it caused a mass burial producing this stunning fossil record." #SternbergMuseum #sternbergmuseumofnaturalhistory #HaysKansas #theKansasSea

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