swallet


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swallet

(ˈswɒlɪt)
n
1. (Mining & Quarrying) mining an underground body of water that breaks in on miners
2. (Physical Geography) geography a hole through which a stream of water disappears underground
References in periodicals archive ?
The sides of valleys along the walk's route are pockmarked with swallet holes--geological features caused by the chalk bedrock weakening until the ground collapses in on itself.
Temperature variation can indicate the recharge area characteristics of a spring by placing precipitation recharge travel time on a continuum of fast, direct swallet inflow to the subsurface all the way to gradual infiltration and near darcian flow conditions with long contact time in unsaturated zone geologic materials.
But since heading down to Llethrid Swallet in Gower with two mates when he was 14, caving has held his fascination, taking him to locations all over Britain, and as far afield as the former Yugoslavia.