bedding bottom
1.The sedimentary research into 3 piston cores from the middle and eastern Bengal deep water fan indicates those thin bedded muddy silts, with heavy oxidation colors and a few calcareous gravely corroded shells but free of any graded bedding, are products of deposition of reworked materials by geostrophic bottom currents.
2.However, the authors discovered recently that the top and bottom surfaces of the Loushanguan Formation are palaeokarst unconformity interfaces, and there are a lot of interbeds of granular (oolite, pisolite and oncolite) dolomite and algae-mat dolomite, especially sedimentary structures such as the bird?s eye, stromatolite, cross bedding and tepee structures.
