On the Sandstones and Breccias of the South of Scotland of an age subsequent to the Carboniferous Period

In a memoir “on the New Red Sandstone of the Southern Portion of the Vale of the Nith,” published in vol. vi. of the Quart. Journ. Geol. Soc. (p. 389), I have given in detail the names of the localities where sections of these strata are exposed, also their dip at the several localities, and the connexion which exists between the different deposits composing what is termed the “New red sandstone” in this neighbourhood. In describing the area occupied by this sandstone, I have been in error in supposing that, in the locality under notice, there is a connexion between the sandstone-beds of the Vale of the Nith and those of that portion of the Vale of the Annan in which the Corncocklemuir strata occur. A more perfect examination of the Dumfriesshire sandstones induces me to believe that there are five, if not seven distinct areas occupied by these deposits; and that the beds which appear in these several districts have an intimate connexion with each other, and are, for the most part, referable to the same geological age.