Silcrete is an indurated (resists crumbling or powdering) soil duricrust formed when surface soil, sand, and gravel are cemented by dissolved silica. The...

Hampshire. Sarsen stones are the post-glacial remains of a cap of Cenozoic silcrete that once covered much of southern England. This is thought to have formed...

during the final shaping of Still Bay bifacial points made on heat‐treated silcrete." Both pressure flaking and heat treatment of materials were previously...

Renosterveld – Vegetation type endemic to the Western Cape, South Africa Swartland Silcrete Renosterveld The World Wide Fund for Nature divides the Cape floristic...

used regularly and systematically by early modern humans to heat treat silcrete stone to increase its flake-ability for the purpose of toolmaking approximately...

000 years ago. Evidence also exists for the systematic heat treating of silcrete stone to increase its flake-ability for the purpose of toolmaking, beginning...

caprock of various tablelands. In case of duricrusts, e.g. laterite or silcrete, the formation of tablelands involves a three stage process. First, the...

sesquioxides of iron; alcrete (bauxite) is dominated by sesquioxides of aluminum; silcrete by silica; calcrete (caliche) by calcium carbonate, and gypcrete (gypcrust)...

dissolve silicon oxide rather than the aluminum oxides and iron oxides. Silcrete has been suggested to form in zones in relatively dry "precipitating zones"...

dominant raw material used for Still Bay point production in Blombos Cave is silcrete (72%), followed by quartzite (15%) and quartz (13%). Whereas the quartzite...

of these sediments. Although it is hypothesized that it is groundwater silcrete, its origin remains unresolved. The Schunemunk puddingstone, which is exposed...

hard, brittle stones, rich in silica, such as quartzite, chert, flint, silcrete and quartz (the latter particularly in the Kimberleys of Western Australia)...

followed by Hoz de Gallo Conglomerate, this is capped by sandstone and silcrete at another unconformity marking the end of the Permian. Then in the Triassic...

Gunai/Kurnai people manufactured stone tools, as long as 5,000 years ago, from silcrete quarries in the Haunted Hills, west of Morwell. Scarred trees and rock...

the base). In Uruguay, Fishtail points were most often manufactured from silcrete (54%), with other source rocks including chert (10%) jasper (9%) quartzite...

course led to millennia of salinity buildup and formation of calcretes and silcretes. Buol, Stanley W.; Southard, Randal J.; Graham, Robert C.; McDaniel, Paul...

typically ranging from 2 to 200 millimetres (0.1 to 7.9 in) diameter. silcrete An indurated soil duricrust formed when surface sand and gravel are cemented...

Alluvium Fynbos (FFa 3) Swartruggens Quartzite Fynbos (FFq 2) Swellendam Silcrete Fynbos (FFc 1) Tsitsikamma Sandstone Fynbos (FFs 20) Western Altimontane...

when it is used in order to create stronger tools, such as the heated silcrete at Blombos, Howiesons Poort and Still Bay, and the heat treated bone tools...

Sepiolite-cemented material has been termed "sepiocrete" as calcrete, silcrete or ferricrete is used to refer to materials cemented by calcite, silica...

combination of carbonized roots and rootlets, rhizoliths, illuvial clay cutans, silcrete-like silica cements, and the leaching and alteration of the sandy sediments...

Agate Basalt Chalcedony Chert Diorite Flint Greenstone Jadeite Jasper Obsidian Onyx Quartz Quartzite Sandstone Schist Silcrete...

and food resources depleted. Their country contained the most important silcrete, chert and quartzite mines in Tasmania. The South East people had a hostile...

Braiakaulung people manufactured stone tools, as long as 5,000 years ago, from silcrete quarries in the Haunted Hills, west of Morwell and the Gunai/Kurnai had...

of groundwater, precipitated as the ambient conditions changed, forming silcrete (a type of duricrust), with the silica forming a secondary cement binding...

developed soils that usually have a relatively impermeable layer (claypan or silcrete duripan) in the subsoil. This impermeable layer locally impedes drainage...

of the Mt Carmel Ranges. Taungurung people could also obtain quartz and silcrete for the manufacture of tools for hunting and food preparation from Mt Balck...

extent of Renosterveld in the Swartland, a related biome   Swartberg shale renosterveld   Swartberg granite renosterveld   Swartberg silcrete renosterveld...

region of the Western Cape Province, South Africa, where it occurs on silcrete, but also in flat, coastal sandy or clay Renosterveld vegetation, between...

explained by contamination of newer carbon in the samples analyzed. 11 silcrete flakes dating to 50,000 years ago represents the first evidence of human...