The paleo channel deposits comprise brown coloured, fine to medium sands with well preserved cross-beddings.
2.
The dark medium sand reflects updrift bluff erosion of a tephraeous maar eruption about 17, 000 years ago.
3.
The grain size for these well-sorted, very fine to medium sands is about 0.06 to 0.5 mm.
4.
The beach is extremely planar and composed of comparatively well-sorted fine and medium sand, with a few stray cobbles of uncertain but probable ice-rafted origin.
5.
A single flood event deposited an estimated 100, 000, 000 m 3 of coarse to medium sand as a sheet deposit on the modern delta just south of the international boundary.
6.
Its grain sizes are mainly coarse sand and medium sand, which are larger than that in littoral barrier dune . The sedimentary structures include parallel bedding and low-angle cross-bedding.
7.
In plan view, these are U-shaped or V-shaped mounds of well-sorted, very fine to medium sand with elongated arms that extend upwind behind the central part of the dune.
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