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About: Diastem     Goto   Sponge   NotDistinct   Permalink

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In geology, a diastem (plural: diastems) is a short interruption in sedimentation with little or no erosion. They can also be described as very short unconformities (more precisely as very short paraconformities).In 1917 Joseph barrel of USA estimated the rate of deposition of succession from the available radiometric age. His accumulation showed that the strata accumulation was at the rate of thousands of years per foot rather than hundreds. He stated that diastems are universal in sedimentary rocks and explain them as a product of fluctuation of base level.