Describes four of the five outliers of lower Carboniferous deposits that are downfaulted against Silurian strata on the northwest coast of Solway Firth, near Kirkcudbright, southwestern Scotland. Three are less than a mile in extent; the fourth, the Rerrick, extends seven miles along the coast and three-fourths of a mile inland. The succession of beds, fossils, structure, and correlation are discussed.