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An assemblage of quartz pebble-tools has recently been discovered on a high terrace of the A Hier river. This has furnished details of the early phases in the typology built up on the evidence of numerous sites in the Bourbonnais. According to indirect dating data, it can be dated to between 0.8 and 0.5 M.a.
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Magoga et al. (1991) studied this question.
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