basin

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basin

1. any partially enclosed or sheltered area where vessels may be moored or docked
2. the catchment area of a particular river and its tributaries or of a lake or sea
3. a depression in the earth's surface
4. Geology a part of the earth's surface consisting of rock strata that slope down to a common centre

basin

A huge crater. Lunar basins are multiringed structures that are several hundred kilometers in diameter and were all produced during the first 750 million years of lunar history by intense meteoritic impact. The youngest basins (Orientale, Imbrium, Crisium, Nectaris, and Serenitatis) may have been excavated during a cataclysmic period around 3900 million years ago. The ejecta blankets of basins are extensive and provide the basis for highland stratigraphy. Basins are so defined by their systems of concentric ring structures, most of which are now in the form of ridges and mountain arcs. Basins on the Moon's nearside were filled with lava at some time up to 3000 million years ago to produce maria: the resulting mare has the same name as the basin (e.g. Mare Imbrium). Several unfilled basins (thassaloids) exist on the farside, the largest of which was revealed as a vast depression by the Apollo 15 laser altimeter. At least 28 basins are now known to exist. See also rille; mascons.

Basin

 

the accumulation of water flows with no drainage or with slow drainage in natural or artificial depressions in the earth’s surface. Basins are formed when there are en-closed hollows on the surface and when the water flowing into them exceeds the water lost by evaporation and seepage into the soil. Basins can be permanent or temporary, arising only during periods of the year which abound in water. Basins are classified as freshwater or saltwater, depending upon their chemical composition and the amount of salts dissolved in the water. The physical, chemical, and bio-logical processes in basins progress in various ways, depending upon the type of basin. Reservoirs, ponds, and canals are artificial basins.


Basin

 

negative (hollow) form of relief of the earth’s surface with more or less isometric or slightly elongated outlines. A basin may be closed on all sides or open in one or two directions. On the basis of morphology flat-bottom, bowl-shaped, and other basins are distinguished; by origin basins are divided into tectonic, volcanic (for example, calderas), erosion, glacial (for example, moraine-dammed basins), deflation, and karst. By drainage conditions they are divided into basins through which water flows, basins with outlets, and basins without outlets (in arid regions).

In the geomorphology of the sea floor a distinction is made between basins in the transition zone, which are occupied by geosynclinal seas, and oceanic basins, which are the largest negative forms of relief on the ocean floor.

basin

[′bās·ən]
(civil engineering)
A dock employing floodgates to keep water level constant during tidal variations.
A harbor for small craft.
(design engineering)
An open-top vessel with relatively low sloping sides for holding liquids.
(geology)
A low-lying area, wholly or largely surrounded by higher land, that varies from a small, nearly enclosed valley to an extensive, mountain-rimmed depression.
An entire area drained by a given stream and its tributaries.
An area in which the rock strata are inclined downward from all sides toward the center.
An area in which sediments accumulate.
(metallurgy)
The mouth of a sprue in a gating system of castings into which the molten metal is first poured.
(oceanography)
Deep portion of sea surrounded by shallower regions.

basin

1. A somewhat shallow vessel for holding water (or the like).
2. A shallow tank or natural or artificial depression containing water.
References in periodicals archive ?
The Albert Formation may be considered a large order sequence or supersequence that is common to most lake systems and results from the basinal interplay between accommodation space and sediment input.
We studied the diagenetic history of this tight gas reservoir in the context of its basinal history, based on >200 core samples from the Phalen and Prince collieries and samples from elsewhere in the basin.
Tri Link has established a major basinal control position of 1,400 square miles of 100 percent owned lands.
The basinal limestones of the Diyab formation are the source of most of the oil and gas now contained in Abu Dhabi's Jurassic and Cretaceous reservoirs.
The basinal limestones of Diyab provide top seal for the Araej, but intra-formational seals also are present.
Source Rocks: The basinal limestones of the Diyab formation are the source of most of the oil and gas now contained in Abu Dhabi's Jurassic and Cretaceous reservoirs.
In the Hakkari region and parts of Siirt and Diyarbakir, the Midyat is equated with the generally younger Asmari of south-western Iran and northern Iraq, displaying changes in regional facies and grading into more basinal sediments to the north and the west.
The overlying Izhara is lithogically similar but contains some darker, more basinal limestones.
present day and could lie within a high TOC KC basinal sweet-spot.
It is Callovian and Oxfordian in age and reaches a thickness of more than 300 feet in the basinal area between the Ghawar and Khurais Fields.
Such system of monitoring is implemented also in the course of organization and management over nature use under the principles of the concept of basinal nature use (CBNU).