In summer 1788, geologist James Hutton sailed along the coast south of Edinburgh to Siccar Point, where outcropings of vertically-tilted gray slate were (and still are) overlain by nearly flat-lying red sandstone. A product of the Scottish Enlightment, Hutton correctly reasoned that it would be impossible to explain what he observed in the context of an Earth that was -- as then believed -- only 6,000 years old.
Hutton is considered the father of modern geology, and the first who proposed the concept of "deep time." On their new album, Karine Polwart and Dave Milligan tell the story of Siccar Point much more elegantly. Also on today's show, new music from Jason Isbell, Two Bird Stone, Adam Holmes, Martyn Joseph, Geoff Muldaur, and Norman Blake.