WebThe sand grains are, however, still poorly sorted in these rocks. Submature sandstones are common as river-channel sands, tidal-channel sands, and shallow submarine sands swept by unidirectional currents. Mature sandstones are clay-free, and the sand grains are subangular, but they are well sorted--that is, of nearly uniform particle size. WebThe dominance of coarse to very fine-grained particles, and moderately well to poorly sorted sandstones grains of the Kerri -Kerri Formation probably points to a moderate to low energy ...
Sedimentary rock - Classification of sandstones Britannica
WebMay 6, 2024 · Sorting. The extent to which all the grains are the same size is known as sorting. If all the grains are the same size, they are well sorted. Some sandstones are well sorted, and some are not. Most conglomerates are poorly sorted, and consist of a mixture of grain sizes ranging from sand to pebble. Web1. n. [Geology] Well-sorted sediments are of similar size (such as desert sand), while poorly-sorted sediments have a wide range of grain sizes (as in a glacial till). A well-sorted … flughafen lyon bus
Biostratigraphy of the Devonian–Lower Carboniferous Deposits of …
WebThe dominance of poorly sorted sandstones in the Prince Albert Formation may point to a near source region. However, the considerable number of well sorted to moderately well sorted sediments in other formations indicate continuous reworking of the sediments by currents and waves [ 66 ]. Webwacke, also called dirty sandstone, sedimentary rock composed of sand-sized grains (0.063–2 mm [0.0025–0.078 inch]) with a fine-grained clay matrix. The sand-sized grains … WebJul 10, 2011 · poorly sorted, cross-beds: high energy, oxidizing environment with few fossils: desert dune : sandstone: well sorted, large scale cross-beds: terrestrial reptile traces: glacier - till: tillite: angular to rounded grains, poorly sorted, unstratified (massive) high energy environment with few fossils: glacier - outwash: sandstone, conglomerate green energy supply limited