Lantian formation

The Lantian formation is a 150-meter-thick sequence of rocks deposited in southern China during a 90-million-year epoch in the Ediacaran period. Its algal macrofossils are the oldest large and complex fossils known. == Sedimentology == The rocks were deposited in shallow seas, in the photic zone yet below storm wave base{clarify|date=November 2013...
Found on http://en.wikipedia.org/wiki/Lantian_formation
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