Following the discovery of ten ‘brown beds’ near Birnam, Perthshire, and their identification as air-fall tuffs (Batchelor 2004), further fieldwork along the regional strike has yielded more examples of these unusual beds. Each bed has a distinctively brown amorphous appearance in the field, with sharp upper and lower contacts with its host metasediment, and thicknesses range from 5 mm to 100 mm. The geographical distribution of the localities is shown in Figure 1.

...

The first locality SW of Birnam which yielded ‘brown beds’ is at a small cliff on the west side of the Sma’ Glen, near...

First Page Preview

First page PDF preview
You do not currently have access to this article.