Oligocene


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Related to Oligocene: Pleistocene, Pliocene, Paleocene, Miocene, Eocene

Oligocene

of, denoting, or formed in the third epoch of the Tertiary period, which lasted for 10 000 000 years
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005

Oligocene

[ə′lig·ə‚sēn]
(geology)
The third oldest of the seven geological epochs of the Cenozoic Era, beginning 34 million years ago and ending 24 million years ago. It corresponds to an interval of geological time (and rocks deposited during that time) from the close of the Eocene Epoch to the beginning of the Miocene Epoch.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
Their suggestions are based on vertebral characters of three articulated erycine snakes preserved in a block of matrix from the Oligocene White River Formation of Wyoming.
In contrast to serpulids, the biomineralization system of cirratulids has not evolved since the appearance of calcareous tubes in the Oligocene. In this respect cirratulids are also similar to sabellids, in which the tube structures have remained unchanged from the Early Jurassic when they first began to calcify (Vinn et al.
During the Oligocene (Chattian) a great channel connecting the Mediterranean and the dominion Indian-Pacific through the South of Iran was formed, separating Mica and Euro-Asia.
The infilling of the canyon from the Rupelian on may simultaneously explain the thick Oligocene and Miocene sections in Wenonah J-75, the paucity of planktic foraminifera at most levels, the poverty of the benthic assemblages at some levels, and the unusual, oligospecific assemblages in others.
Was the early Eocene warmer and the Oligocene cooler because of a decline in the concentration of atmospheric carbon dioxide, a greenhouse gas, or were other factors responsible, such as rearrangement of oceanic passages and currents by slowly drifting continents?
"A successful well result could lead to substantial growth for the company in Egypt, open up the onshore Oligocene play in the Nile delta and could ultimately lead to a material increase in onshore gas production in Egypt," he said.
With a hydrocarbon column in excess of 180 metres, the discovery increases our confidence in the materiality of the deep Oligocene play in the East Nile Delta."
This unit also involves a Mollas unit that has located at the west of Nosratabad fault as a inclines, and its age is Oligocene. Turbidite unit has located at the east and southeast of Kahurak fault, and also lithology of them and the studies that has been done, this area has been divided to 3 terrene.
The primates lived during the Oligocene epoch, which lasted from 34 to 23 million years ago.
The Canadian firm will use the proceeds of the private placement and the loan to support its 2013 capital and operating programme, which involves the contimued appraisal of the Kurdamir Oligocene discovery and existing Sarqala discovery, as well as exploration activities on the Garmian Block, it noted.
The Kurdamir-2 exploration well was drilled through the Lower Fars top seal to a depth of around 2,270 metres, where the third string of casing will be set above the Oligocene reservoir.