Medical dictionary. 2011.
growth — The increase in size of a living being or any of its parts occurring in the process of development. accretionary g. g. by an increase of intercellular material. appositional g. g. accomplished by the addition of new layers on those previously… … Medical dictionary
accretionary hypothesis — noun : any explanation of the origin of the earth that involves the hypothesis of gradual growth by the gravitational infall of solid bodies (as asteroids, planetesimals, or meteorites) compare planetesimal hypothesis … Useful english dictionary
Small shelly fauna — The small shelly fauna or small shelly fossils, abbreviated to SSF, are mineralized fossils, many only a few millimetres long, with a nearly continuous record from the latest stages of the Ediacaran to the end of the Early Cambrian period. They… … Wikipedia
Asia — /ay zheuh, ay sheuh/, n. a continent bounded by Europe and the Arctic, Pacific, and Indian oceans. 2,896,700,000; ab. 16,000,000 sq. mi. (41,440,000 sq. km). * * * I Largest continent on Earth. It is bounded by the Arctic Ocean, the Pacific Ocean … Universalium
Superior craton — in the west. The western margin extends from northern Minnesota through eastern Manitoba to northwestern Ontario.The formation of the Superior craton is best explained within the context of 2.72 2.68 Ga accretion of small continental plates and… … Wikipedia
Oceanic trench — Oceanic crust is formed at an oceanic ridge, while the lithosphere is subducted back into the asthenosphere at trenches. The oceanic trenches are hemispheric scale long but narrow topographic depressions of the sea floor. They are also the… … Wikipedia
Precambrian time — Interval of geologic time from с 3. 8 billion years ago, the age of the oldest known rocks, to 544 million years ago, the beginning of the Cambrian Period. This interval represents more than 80% of the geologic record and thus provides important… … Universalium
Columbia (supercontinent) — Columbia, also known as Nuna and Hudsonland, was one of Earth s oldest supercontinents. It was first proposed by J.J.W. Rogers and M. Santosh (2002)[1] and is thought to have existed approximately 1.8 to 1.5 billion years (Ga) ago in the… … Wikipedia
Trans-Hudson orogeny — [ North American craton, also called Laurentia.] [ Wyoming, Superior and Hearne cratons] The Trans Hudson orogeny, Trans Hudsonian orogeny, Trans Hudson orogen (THO), or Trans Hudson Orogen Transect (THOT), (also referred to as the Trans… … Wikipedia
plate tectonics — plate tectonic, adj. Geol. a theory of global tectonics in which the lithosphere is divided into a number of crustal plates, each of which moves on the plastic asthenosphere more or less independently to collide with, slide under, or move past… … Universalium
