A Drift-filled Valley at Thistleton on the Rutland–Lincolnshire Border

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Abstract
A borehole programme by Stewarts and Lloyds Minerals, Ltd., has shown that a narrow tongue of boulder clay conceals a deep steepsided valley cut into the Lincolnshire Limestone and filled with drift. Plotting of structure contours indicates that, even where thedrift is more than 100 feet thick, there is considerable “bulging” of the Upper Lias Clay.

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