Definitions

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. An indurated duricrust formed when silica is dissolved and resolidifies as a cement.

Etymologies

Blend of silica and concrete (Wiktionary)

Examples

  • Fynbos/Renosterveld Mosaic comprises a mosaic of fynbos and renosterveld communities associated largely with shale-derived soils, especially where silcrete/ferricrete material is present in the profile or occur as remnant outcrops.

    Lowland fynbos and renosterveld

  • They are underlain predominantly by Cape shales, and form an undulating plain 150 m to 400 m above sea level with occasional silcrete - and ferricrete-capped hills, remnants of a Tertiary land surface.

    Lowland fynbos and renosterveld

  • Much of the region is occupied by sand dunes, with areas of calcrete and silcrete.

    Great Victoria desert

  • Pitting and trenching work exposed a thick, pervasive overburden generally comprising fine grained red brown to orange brown silt sand at the top, followed by gravelly silt and ferricrete intercalated with silcrete.

    The Earth Times Online Newspaper

  • They found that unheated chunks could not be pressure flaked, while blocks of heated silcrete yielded points very much like the ones discovered.

    Yahoo! News: Business - Opinion

  • Blombos Cave involved pressure flaking with heat-treated silcrete.

    Yahoo! News: Business - Opinion

  • However, the surfaces of silcrete that was treated with heat have a smooth, glossy appearance.

    Yahoo! News: Business - Opinion

  • Africa during the Middle Stone Age by anatomically modern humans and involved the heating of silcrete -- quartz grains cemented by silica -- used to make tools, the university said in a news release.

    Reuters: Top News

  • The removal of flakes from unheated silcrete produces scar surfaces with a rough, dull texture.

    Yahoo! News: Business - Opinion

  • The stone points were made of silcrete, or quartz grains cemented by silica, which needs to be heat-treated before pressure flaking.

    Yahoo! News: Business - Opinion

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