2007-03-08 03:47:20 · 3 answers · asked by Anonymous in Science & Mathematics ➔ Earth Sciences & Geology
No, it is not even the oldest period in the Phanerozoic Eon (which is the most recent Eon, representing the last 570 million years of the Earth's history). That honor belongs to the Cambrian Period. The "Pre-cambrain" time represents some 87% of the Earth's history, which gives us time for seven times the amount of periods that have occurred in the Phanerozoic, about 100 periods of which the Ordovician Period is the 11th youngest (approximately).
2007-03-08 07:06:39 · answer #1 · answered by Amphibolite 7 · 0⤊ 0⤋
Nope. It's the second-most-ancient period of the Paleozoic Era, which is the first era of the Phanerozoic Eon, which is the fourth period of earth's existence.
2007-03-08 11:50:04 · answer #2 · answered by Brian L 7 · 0⤊ 0⤋
by no means. There was the Ediacaran and Cambrian before that but the earliest I think is the Hadean which is when the Earth was formed.
See the link for a time line
2007-03-08 11:51:54 · answer #3 · answered by Anonymous · 0⤊ 0⤋