Extent
The fauna of the middle Cambrian has a cosmopolitan range. All assemblages preserving soft-part anatomy have a very similar fauna, even though they span almost every continent. The wide distribution has been attributed to the advent of pelagic larvae.
Read more about this topic: Burgess Shale Type Fauna
Famous quotes containing the word extent:
“He who receives an injury is to some extent an accomplice of the wrong-doer.”
—Henry David Thoreau (1817–1862)
“I don’t think that a leader can control to any great extent his destiny. Very seldom can he step in and change the situation if the forces of history are running in another direction.”
—Richard M. Nixon (1913–1995)
“There is hardly a man clever enough to recognize the full extent of the evil he does.”
—François, Duc De La Rochefoucauld (1613–1680)