Oligocene, Epoch. A division of geologic time that began about 37,000,000 years ago and lasted 14,000,000 years. The Oligocene is the third and latest division of the Paleogene Period. Most of the rock formed during the Oligocene is sedimentary-During this time some mountain building occurred in the northwestern United States. Petroleum and natural gas are found in commercial quantities in rocks of the Oligocene Epoch.
You Might Also Like
Whenever I hear people talking about buying diamonds, they keep mentioning the four seas. What does that have to do with diamonds?
Everyone knows that once a bone has fossilized, it's hard as a rock, right? So how did scientists find soft tissue inside a broken dinosaur bone?