Importance
Because continental crust mainly lies above sea level, its existence allowed land life to evolve from marine life. Its existence also provides broad expanses of shallow water known as epeiric seas and continental shelves where complex metazoan life could become established during early Paleozoic time. If Earth were like the other silicate planets and lacked the duality of oceanic and continental crust, our planet would be a very different place and the evolution of Homo sapiens and civilization might have been impossible.
Read more about this topic: Continental Crust
Famous quotes containing the word importance:
“The importance to the writer of first writing must be out of all proportion of the actual value of what is written.”
—Elizabeth Bowen (1899–1973)
“When will the world learn that a million men are of no importance compared with one man?”
—Henry David Thoreau (1817–1862)
“We have been told over and over about the importance of bonding to our children. Rarely do we hear about the skill of letting go, or, as one parent said, “that we raise our children to leave us.” Early childhood, as our kids gain skills and eagerly want some distance from us, is a time to build a kind of adult-child balance which permits both of us room.”
—Joan Sheingold Ditzion (20th century)