Where water wells up from the earth: excavations at the findspot of the Late Bronze Age Broadward hoard, Shropshire

Lithostratigraphy and radiocarbon dating (tables 2 and 3)

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Lithostratigraphy and radiocarbon dating (tables 2 and 3)

The basal mineral-rich fine-grained sediments (137–123cm; see fig 11; table 2) were deposited prior to 14,982–14,145 cal yrs BP (13,032–12,195 cal yrs BC; table 3) during the Late Devensian Lateglacial. The presence of calcium carbonate in the sediments from 137–126cm suggests that they were at least partially derived from weathering and erosion of the nearby Limestone bedrock (eg Much Wenlock Limestone Formation).50 Organic sedimentation commenced at 14,982–14,145 cal yrs BP (123cm; 13,032–12,195 cal yrs BC), and continued until after 2108–1899 cal yrs BP (158 cal yrs BC–AD 51; table 3). The organic sedimentary units mainly comprise herbaceous peat (sedge and grass) and wood peat, which indicate fen swamp and wooded fen carr respectively. The only exception is a 2cm thick unit of moss peat deposited from ~4173 to ~3996 cal yrs BP (35–33cm; ~2223 to ~2046 cal yrs BC), which suggests an increase in bog surface wetness at that time.

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