What do you mean by sedimentary basin?
1.1 The official definition of a sedimentary basin is: a low area in the Earth’s crust, of tectonic origin, in which sediments accumulate. The essential element of the concept is tectonic creation of relief, to provide both a source of sediment and a relatively low place for the deposition of that sediment.
What is a craton in geology?
craton, the stable interior portion of a continent characteristically composed of ancient crystalline basement rock. The term craton is used to distinguish such regions from mobile geosynclinal troughs, which are linear belts of sediment accumulations subject to subsidence (i.e., downwarping).
What is the concept of foredeep?
: a deep depression in the ocean bottom fronting a mountainous land area the Tuscarora foredeep lies off the coast of Japan.
Where is the forearc basin located?
trench
Forearc basins are marine depositional basins on the trench side of arcs (Figure 3.16), and they vary in size and abundance with the evolutionary stage of an arc.
What is Intracratonic basin in geology?
Intracratonic basins are areas on the craton, at some distance from the craton margin, undergoing differential subsidence relative to the surrounding area of cratonic basement.
What is basin in geology?
In geology, a basin refers to a depression or dip in the Earth’s surface. Basins are shaped like bowls, with sides higher than the bottom. Being oval or circular in shape, basins resemble a sink or tub you might have in your own bathroom, hence its name.
What does the presence of a foreland basin indicate?
The foreland basin typically shows a thermal and rheological structure similar to a rifted continental margin with three brittle layers above three ductile layers. The temperature underneath the orogen is much higher and thus greatly weakens the lithosphere. According to Zhou et al.
What is the meaning of fairy foreland?
this phrase particularly means that where the river flows the surrounding is really beautiful just like the fairy land.
Where are the foreland basin systems located on Earth?
INTRODUCTION Foreland basin systems consist of depositional regions on continental crust in front of major fold-thrust belts. They are among the largest accu- mulations of sediment on Earth, spanning entire continental landmasses and spilling into adjacent remnant ocean basins and continental shelves on passive margins.
How is the formation of the mountain belt related to foreland basins?
The formation of the mountain belt (i.e. thickening of the crust) imposes a load upon the lithosphere, which responds by flexing. As a consequence a foreland basin is generated ahead of the mountain belt.
Which is a characteristic of a retroarc foreland basin?
Another characteristic feature of retroarc foreland basins is that the proximal basin margin progressively becomes involved with the propagating fold-thrust belt ( Figure 3.18 ). Sediments shed from the rising fold-thrust belt are eroded and redeposited in the foreland basin, only to be recycled again with basinward propagation of this belt.
Is the orogenic wedge part of the foreland basin?
This more inclusive deļ¬nition of a foreland basin system is more realistic than the popular conception of a foreland basin, which generally ignores large masses of sediment derived from the thrust belt that accumulate on top of the orogenic wedge and cratonward of the forebulge.