glacial till

noun

(geology) an unstructured geological deposit composed of boulders, clay, gravel, sand, and silt that is transported by glacial drift.

The glacial till formed a thick layer of sediment in the valley.

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意味（1）

(geology) an unstructured geological deposit composed of boulders, clay, gravel, sand, and silt that is transported by glacial drift.

The updated geotechnical data report submitted by Golder Associates to Capital Transit Partners, and then presented to the city, describes the valley as a natural trench in the bedrock filled with between 15 and 37 metres of loose fill, silty clay and "glacial till," or broken, weathered rock.

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glacial till

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