The stretching model of a basin represents rifting as an instantaneous, uniform stretching of the whole lithosphere by pure shear: crust and mantle lithosphere are thinned by the same factor, and hot asthenosphere rises passively to fill the space, after which the lithosphere cools. The stretching factor is the ratio of the width of the stretched region after stretching to its width before, equal to the ratio of the initial to the final thickness of the crust. The subsidence produced during stretching is the syn-rift subsidence; that produced afterwards by the cooling of the lithosphere is the post-rift subsidence, or thermal subsidence.
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Earth and Space Sciences · পরিভাষা
Stretching model; stretching factor; syn-rift and post-rift subsidence কী?
অন্য নাম: stretching model · stretching factor · syn-rift subsidence · post-rift subsidence