commission for marine geology
21Geologic time scale — This clock representation shows some of the major units of geological time and definitive events of Earth history. The Hadean eon represents the time before fossil record of life on Earth; its upper boundary is now regarded as 4.0 Ga.[1] Other… …
22Antarctica — /ant ahrk ti keuh, ahr ti /, n. the continent surrounding the South Pole: almost entirely covered by an ice sheet. ab. 5,000,000 sq. mi. (12,950,000 sq. km). Also called Antarctic Continent. * * * Antarctica Introduction Antarctica Background:… …
23Ireland — This article is about the island. For the sovereign state of the same name, see Republic of Ireland. For the constituent country of the United Kingdom, see Northern Ireland. For other uses, see Ireland (disambiguation). Coordinates …
24Tertiary Period — Interval of geologic time, 65–1. 8 million years ago. It constitutes the first of the two periods of the Cenozoic Era, the second being the Quaternary. The Tertiary has five subdivisions: (from oldest to youngest) the Paleocene, Eocene, Oligocene …
25Marcellus Formation — Stratigraphic range: Middle Devonian …
26Earth Sciences — ▪ 2009 Introduction Geology and Geochemistry The theme of the 33rd International Geological Congress, which was held in Norway in August 2008, was “Earth System Science: Foundation for Sustainable Development.” It was attended by nearly… …
27Leonard Harrison State Park — Geobox Protected Area name = Leonard Harrison State Park native name = other name = other name1 = category local = Pennsylvania State Park category iucn = III image size = 300 image caption = View north of Pine Creek Gorge, Pine Creek, and the… …
28Cretaceous–Tertiary extinction event — Artist s rendering of bolide impact Badlands nea …
29Everglades — is also the name of a city in Collier County, Florida.The Everglades are a subtropical wetland located in the southern portion of the U.S. state of Florida, comprising the southern half of a large watershed. The system begins near Orlando with… …
30Natural scientific research in Canada — This article outlines the history of natural scientific research in Canada, including mathematics, physics, astronomy, space science, geology, oceanography, chemistry, biology, medical research and psychology. The social sciences are not treated… …
