Quotes About Silurian

The Silurian Period-the grandest of all the Periods,-and, as yet, apparently the seed-time of all succeeding life.

It was these strata that Sedgwick named after a Latinized English term for the country of Wales—"Cambria," a designation that eventually replaced "Silurian" as the name for the earliest strata of animal fossils.

Despite the scope of his synthesis, there was one set of facts that troubled Darwin—something he conceded his theory couldn't adequately explain, at least at present. Darwin was puzzled by a pattern in the fossil record that seemed to document the geologically sudden appearance of animal life in a remote period of geologic history, a period that at first was commonly called the Silurian, but later came to be known as the Cambrian.