Abstract
Summary: In many parts of Scotland, igneous, metamorphic, and consolidated sedimentary rocks are weathered locally to depths as great as 40 feet. The weathered rock is often overlain by glacial till which incorporates some of the weathered material. Elsewhere, the weathered rock extends to the surface and forms the parent material of contemporary soils. Observations of weathering and soil formation in various parts of Europe, Asia, and North America indicate that the occurrence of deeply weathered rock in these countries, as well as in Scotland, may be attributed to weathering in a pre‐glacial period.

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