boulder clay

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boulder clay

noun

uncountable A geological deposit of clay, often full of large stones and boulders, which is formed out of the ground moraine material of glaciers and ice-sheets. The geological formation here is boulder clay and lias, and the original intention to keep the railway in open cutting had to be abandoned, as this would have resulted in 90 ft. deep walls through unstable terrain.

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"boulder clay." Wiktionary, via Micwyn, micwyn.com/word/boulder%20clay. Accessed 6 Nov. 2026.

APA

boulder clay. (n.d.). In Wiktionary, via Micwyn. Retrieved November 6, 2026, from https://micwyn.com/word/boulder%20clay

Chicago

"boulder clay." Wiktionary, via Micwyn. Accessed November 6, 2026. https://micwyn.com/word/boulder%20clay.

BibTeX

@misc{boulder_clay_2026,
  title = {boulder clay},
  howpublished = {Wiktionary, via Micwyn},
  year = {2026},
  url = {https://micwyn.com/word/boulder%20clay},
  urldate = {2026-11-06}
}