Abstract
A PIT dug in my garden here exposed about 12 ft. of the usual Thames Valley gravels and sands, at which depth (approximately) what local excavators call “shingle” was reached. This is composed chiefly of flint-stones mixed with sand, and lacks the binding properties of the gravel above. The rule is to stop digging for gravel when the “shingle” appears.
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CARUS-WILSON, C. An Unknown Organism in Flint. Nature 107, 299 (1921). https://doi.org/10.1038/107299b0
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DOI: https://doi.org/10.1038/107299b0
