Terrigenous
71Indian Ocean — an ocean S of Asia, E of Africa, and W of Australia. 28,357,000 sq. mi. (73,444,630 sq. km). * * * Indian Ocean Introduction Indian Ocean Background: The Indian Ocean is the third largest of the world s five oceans (after the Pacific Ocean and… …
72tephrochronology — tephrochronological /tef roh kron l oj i keuhl/, adj. /tef roh kreuh nol euh jee/, n. Geol. a geochronologic technique based on the dating of layers of volcanic ash. Cf. tephra. [1940 45; < Sw tefrokronologi, equiv. to tefr(a) volcanic ejecta ( < …
73Bengal, Bay of — Part of the Indian Ocean. Occupying about 839,000 sq mi (2,172,000 sq km), it is bordered by Sri Lanka, India, Bangladesh, Myanmar, and the northern Malay Peninsula. It is about 1,000 mi (1,600 km) wide, with an average depth of more than 8,500… …
74Devonian Period — Interval of geologic time from 417 to 354 million years ago; it was the fourth period of the Paleozoic Era. During the Devonian, a giant continent was situated in the Southern Hemisphere (see Gondwana), and other landmasses were located in the… …
75Silurian Period — Interval of geologic time, 443–417 million years ago. The third period of the Paleozoic Era, the Silurian follows the Ordovician Period and precedes the Devonian. It marks the first appearance of land plants and jawed fishes. The continents were… …
76submarine fan — Accumulation of land derived sediment on the seafloor; a fan is shaped like the section of a cone, with its apex at the mouth of a subbmarine canyon. The sediments consist largely of sandy material that drops from the canyon current in… …
77Kungurian Stage — ▪ geology last of the four stages of the Lower Permian (Cisuralian) Series, encompassing all rocks deposited during the Kungurian Age (275.6 million to 270.6 million years ago) of the Permian Period. Rock exposures from this stage are well… …
78 Deinonychus — Deinonychus …
79diamictite — A general term for any nonsorted or poorly sorted, noncalcareous, terrigenous sedimentary rock (e.g., pebbly mudstone) containing a wide range of particle sizes. Compare: diamicton. GG …
80Causation and Formation — These words refer to causation, formation, origination, production, growth, development or generation. While this might seem like a pretty broad category, all of the words in the list derive from the single Greek word genesis, which can have all… …
