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Lacustrine silcrete

Pan/lacustrine silcretes (Figure 4.5B, C) most commonly develop within, or adjacent to, ephemeral lakes, pans or playas within endoreic basins (Goudie, 1973 Summerfield, 1982 Figure 4.10C). In the majority of modern evaporitic lacustrine environments, silica precipitation is driven by changes in pH and salt concentration (Thiry, 1999), both of which can... [Pg.124]

Boteti River, Botswana, at Samedupe Drift. (B) Close-up of a partially silicified non-pedogenic calcrete beneath the floor of Kang Pan, near Kang, Botswana. (C) Sheet-like pan/lacustrine silcrete developed through the... [Pg.479]

Bustillo, M.A. Bustillo, M. (1993) Rhythmic lacustrine sequences with silcretes from the Madrid Basin, Spain Geochemical trends. Chemical Geology 107, 229-232. [Pg.132]

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