By David J. Nash, Sue J. McLaren
This cutting-edge quantity experiences either earlier paintings and present study, with contributions from the world over well-known specialists. The booklet is geared up into fourteen chapters and designed to include the entire diversity of terrestrial geochemical sediments.
- An updated and accomplished survey of study within the box of geochemical sediments and landscapes
- Discusses the most duricrusts, together with calcrete, laterite and silcrete
- Considers deposits brought about in numerous springs, lakes, caves and near-coastal environments
- Considers the diversity of thoughts utilized in the research of geochemical sediments, representing an important enhance on prior texts
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Extra resources for Geochemical sediments and landscapes
Local factors are clearly important, such as whether rainfall is mainly in summer or winter, or specific local drainage effects due to host-sediment permeability. , 1992); as these highly porous carbonate-rich gravels occur many metres above the local water table, rapid free drainage occurs promoting high evapotranspiration. 14 A. C. P. WRIGHT B. D. 2 Calcrete microstructures. , 1992). (B) Enlargement of the centre of image in (A) showing needle ﬁbre calcite. (C) Alveolar septal fabrics from Holocene soil, La Mora area, Tarragona, northeast Spain, showing septa made of aligned needle ﬁbre calcite in a root mould; ﬁeld of view is 2 mm wide.
For examples see Alonso-Zarza et al. (1998). P. WRIGHT A. B. 4 (A) Stage V calcrete from the Upper La Mesa surface, Las Cruces area, New Mexico. This surface is over 400 ka. (B) Thick pisolitic calcrete horizon in Quaternary deposits of Fisherman’s Bay, South Australia. Lens cap for scale. 6 Micromorphological Characteristics There are many microtextures associated with calcretes, the origins of many of which have caused controversy; reviews are to be found in Braithwaite (1983), Esteban and Klappa (1983), Wright and Tucker (1991), Wright (1994) and Alonso-Zarza (2003).
McDermott, F. F. (2006a) Modification and preservation of environmental signals in speleothems. Earth-Science Reviews 75, 105–153. , Baker, A. F. J. J. MCLAREN UK): implications for climate change studies. Journal of Hydrology 321, 213–231. M. (1988) Aeolianites and marine deposits of the Wahiba Sands: character and palaeoenvironments. The Journal of Oman Studies Special Report 3, 75–95. S. (1973) Duricrusts in Tropical and Subtropical Landscapes. Oxford: Clarendon Press. S. (1984) Duricrusts and landforms.