Fig. 3.2. U-series results for flowstones overlying engravings in Church Hole and Robin Hood Cave thousand years, or continuous deposition. The thinner calcite deposits (e.g. samples CHC-2, C6, E1, E2) showed flaking and weathering, consistent with little or no recent deposition and gave the oldest ages. Since these deposits necessarily postdate the engravings, we take the younger value (at 2-sigma) of the oldest dates to provided a minimum age for each engraving. Thus we conclude in Church Hole the 'notches' are >12.63 ky, the 'females/birds' are >12.8 ky, and in Robin Hood Cave the 'vulva' is >7.32 ky bp, all at 95 per cent confidence. The results from the 'notches' and the 'vulva' are from the cleanest calcite and thus less affected by any limitations in our detrital correction, and are therefore the most secure dates.
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