Ancient Life
Many rivers fed into the sea bringing leaves and driftwood from the land. These served as the base of the food chain. Bacteria and other microscopic scavengers ate the decaying wood. Plankton ate the bacteria. Clams filtered the small plankton. Snails ate the clams and were eaten in turn by crabs and fish. Mosasaurs and cephalopods ate the fish and crabs. Some organisms were swimmers or floaters, but most lived on or in the sandy mud of the sea bottom. This layer of sandy clay, bones, and shells became the Coon Creek Formation.
Read more about this topic: Coon Creek Formation
Famous quotes containing the words ancient and/or life:
“It takes place ... always without permanent form, though ancient and familiar as the sun and moon, and as sure to come again.”
—Henry David Thoreau (1817–1862)
“Above all, we cannot afford not to live in the present. He is blessed over all mortals who loses no moment of the passing life in remembering the past.”
—Henry David Thoreau (1817–1862)