cornstone

British  

/ ˈkɔːnˌstəʊn /

noun

1. a mottled green and red limestone

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Example Sentences

In the larger island these sediments, comprising sandstones, red, purple and mottled clays with occasional bands of nodular limestone or cornstone, occupy a considerable area on the north side of Millport Bay.

From Project Gutenberg

Cornstone is a limestone containing a large quantity of arenaceous matter or sand.

From Project Gutenberg

The strata of the upper division consist of red, grey and yellow false-bedded sandstones with conglomeratic bands, which are well seen in the Findhorn between Sluie and Cothall, where they are associated with a bed of cornstone, all dipping to the N.N.W. at gentle angles.

From Project Gutenberg

The basis on which the hillock rests is formed of the well-marked calcareous band in the Upper Old Red, known as the Cornstone, which we find occurring here, as elsewhere, as a pale concretionary limestone of considerable richness, though in some patches largely mixed with a green argillaceous earth, and in others passing into a siliceous chert.

From Project Gutenberg

It is a curious circumstance, well fitted to impress on the geologist the necessity of cautious induction, that the boulder-clay not only overlies, but also underlies, this fresh-water deposit; a bed of unequivocally the same origin and character with that at the top lying intercalated, as if filling up two low flat vaults, between the upper surface of the Cornstone and the lower band of the Weald.

From Project Gutenberg