systems tract
systems tract In sequence stratigraphy, a three-dimensional depositional unit, defined by its boundaries and internal geometry. Three systems tracts commonly occur within a single cycle of sea-level changes: the highstand (or highland) systems tract, lowstand (or lowland) systems tract, and, between them, the transgressive systems tract. See also REGRESSIVE SYSTEMS TRACT.
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System , sys·tem / ˈsistəm/ • n. 1. a set of connected things or parts forming a complex whole, in particular: ∎ a set of things working together as parts of… Control Systems , control system In geomorphology, a process-response system where human interference changes the natural functioning of the system. For example, the t… Sympathetic Nervous System , sympathetic nervous system That part of the autonomic nervous system which generally acts to stimulate the body to cope with stress, such as increasi… Systems Design , A system can be defined in several ways, including: (1) a set of interrelated parts that function as a whole to achieve a common purpose; (2) a piece… Parasympathetic Nervous System , parasympathetic nervous system Part of the autonomic nervous system. Its nerve endings release acetylcholine as a neurotransmitter and its actions te… Systems Analysis , During the normal course of doing business, companies engaging in e-commerce are faced with a wide variety of challenges or problems. These vary depe…
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systems tract