BUFFALO SOCIETY OF NATURAL SCIENCES 



169 



The present outcrops of the Old Red sandstone in the British Isles 

 are for the most part discontinuous and decidedly patchy. They fall 

 roughly into five areas (see index map, fig. 16): (1) The Caithness- 



Fig. 



16. Sketch Map of British Isles Showing Distribution of the Old 

 Red Sandstone 

 (After Lake and Rastall) 



Orkney Islands region with a northward continuation into the Shet- 

 lands and a southward one into Sutherland and Rosshire, including 

 the coastal strips on both sides of the Moray Firth; (2) The Forfar- 



