seafloor spreading
71geology — /jee ol euh jee/, n., pl. geologies. 1. the science that deals with the dynamics and physical history of the earth, the rocks of which it is composed, and the physical, chemical, and biological changes that the earth has undergone or is… …
72Clipperton Fracture Zone — ▪ geological feature, Pacific Ocean submarine fracture zone, 4,500 miles (7,240 km) in length, defined by one of the major transform faults dissecting the northern part of the East Pacific Rise in the floor of the Pacific Ocean. Discovered …
73hydrologic sciences — Introduction the fields of study concerned with the waters of the Earth. Included are the sciences of hydrology, oceanography, limnology, and glaciology. In its widest sense hydrology encompasses the study of the occurrence, the… …
74Earth's magnetic field — Computer simulation of the Earth s field in a normal period between reversals.[1] The tubes represent magnetic field lines, blue when the field points towards the center and yellow when away. The rotation axis of the Earth is centered and… …
75Contourite — A contourite is a sedimentary deposit produced by thermohaline induced deepwater bottom currents and may be influenced by wind or tidal forces.[1][2] Most contourites are formed in continental rise to lower slope settings, although they may occur …
76Harry Hammond Hess — Infobox Scientist name = Harry Hammond Hess box width = image width =150px caption =Harry Hess commanding the USS Cape Johnson . birth date = May 24, 1906 birth place = death date = August 25, 1969 death place = residence = citizenship =… …
77Burma Plate — The Burma Plate is a small tectonic plate or microplate located in Southeast Asia, often considered a part of the larger Eurasian Plate. The Andaman Islands, Nicobar Islands, and northwestern Sumatra are located on the plate. This island arc… …
78Mendocino Fracture Zone — ▪ fracture zone, Pacific Ocean submarine fracture zone in the eastern Pacific Ocean, defined by one of the major transform faults dissecting the spreading centre of the Gorda Ridges. The Mendocino Fracture Zone extends west from… …
79Back-arc basin — Back arc basins (or retro arc basins) are geologic features, submarine basins associated with island arcs and subduction zones.They are found at some convergent plate boundaries, presently concentrated in the Western Pacific ocean. Most of them… …
80mountain — mountainless, adj. /mown tn/, n. 1. a natural elevation of the earth s surface rising more or less abruptly to a summit, and attaining an altitude greater than that of a hill, usually greater than 2000 ft. (610 m). 2. a large mass of something… …
