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[mass noun] A breccia or conglomerate cemented together by calcareous material, formed in soils in semi-arid conditions.Also called caliche
- ‘The formation is composed of red siltstones, containing discontinuous calcrete horizons, channelized sandstones and thin beds of current-rippled fine sandstone.’
- ‘The Yellow Cat Member contains a basal calcrete with interbedded sands and clays and extends upward to a prominent sandstone unit.’
- ‘The bottom of the rock has a layer of calcrete that tells us it was at one time exposed to air and it shows the transition between being exposed and becoming submerged.’
- ‘The region's Mediterranean style climate and annual water deficit has led to extensive calcrete development.’
- ‘Brown, grey and yellow siltstone with abundant calcrete nodules and rare small gypsum crystals occurs intercalated with lenticular units of matrix-supported pebbly conglomerate.’
- ‘In a wash below the homesteads is a tool making site; discarded flints of granite, quartz and calcrete ornament the bare sandy soil.’
- ‘In more arid areas calcrete (consisting of calcium carbonate) is the duricrust.’
- ‘Thin coals mark periods of swamp conditions on the floodplain, although some palaeosol profiles suggest relatively well-drained conditions, including a thin calcrete.’
- ‘Although calcrete nodules occur immediately below this fossil forest, the trees are rooted in a thin hydromorphic layer superimposed on top of the underlying well-drained soils.’
- ‘The stacked and generally well-developed nature of the calcrete profiles, by comparison with Quaternary calcretes indicate that the more and phases persisted for hundreds of thousands of years.’
- ‘This calcrete can be three meters thick and looks like a breccia.’
Early 20th century: from calc- + a shortened form of concrete.
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