from The Century Dictionary.

  • noun Stiff, unlaminated, tenacious clay, especially that of the glacial or drift epoch or ice age. Also called drift, till.


Sorry, no etymologies found.


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  • One of the well-known localities for arctic shelly clays occurs at Kilchattan brick-works, where the dark red clay rests on tough boulder-clay and may be regarded as of late glacial age.

    Encyclopaedia Britannica, 11th Edition, Volume 4, Part 4 "Bulgaria" to "Calgary"

  • Impinging on our eastern coast of Scotland and of northern England, it spread over a great part of Holderness, meeting and blending with the inland native glacier on the Humber; and the vast united ice-stream thence pursued its onward southern course, enfolding everything in its icy embrace, to the Thames and to the Severn. {89b} These great ice-streams created the geological formation called β€œThe Drift,” or boulder-clay, which we have at Woodhall.

    Records of Woodhall Spa and Neighbourhood Historical, Anecdotal, Physiographical, and Archaeological, with Other Matter

  • The tide may be out, and only puny waves tumbling on the wet sand, and yet it is impossible to refrain from feeling that the very peacefulness of the scene is sinister, and the waters are merely digesting their last meal of boulder-clay before satisfying a fresh appetite.


  • The U-shaped character of the valleys was very pronounced, while boulder-clay obtruded itself everywhere on our notice.

    The Home of the Blizzard Being the Story of the Australasian Antarctic Expedition, 1911-1914

  • All we know is that the icebergs brought with them vast quantities of mud, which sank to the bottom, and covered up that pleasant old forest-land in what is called boulder-clay; clay full of bits of broken rock, and of blocks of stone so enormous, that nothing but an iceberg could have carried them.

    Madam How and Lady Why

  • Skertchley, S.B.J., on palaeolithic flints in boulder-clay of E. Anglia.

    More Letters of Charles Darwin β€” Volume 2

  • The boulder-clay above the interment is, according to the best authorities, merely a landslip or flow.

    The Antiquity of Man

  • At a short distance from the above section terraces (Number 4) composed of stratified alluvium are seen at the heights of 20, 50, 100, and 150 feet above the Lake of Geneva, which by their position can be shown to be posterior in date to the upper boulder-clay and therefore belong to the fourth period, or that of the last retreat of the great glaciers.

    The Antiquity of Man

  • This period, probably anterior to the earliest traces yet brought to light of the human race, may have coincided with the submergence of England, and the accumulation of the boulder-clay of Norfolk, Suffolk, and

    The Antiquity of Man

  • At one of these localities, Mr. Smith of Jordanhill informs me that a rude ornament made of cannel coal has been found on the coast in the parish of Dundonald, lying 50 feet above the sea-level, on the surface of the boulder-clay or till, and covered with gravel containing marine shells.

    The Antiquity of Man


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