Calcareous
Environmental Archaeology, A Guide to the Theory and Practice of Methods, from Sampling and Recovery to Post-excavation (second edition), published by English Heritage (now Historic England) in 2011, defines calcareous as: ‘…containing or characteristic of calcium carbonate.’
It defines calcined as: ‘…burned grey-white.’
And calcite as: ‘…the most commonly occurring crystalline form of calcium carbonate.’
Calcareous soil is soil which contains accumulations of calcium and magnesium carbonate, formed by the weathering of calcareous rocks and fossil shell beds.
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