in Sutherland, Ross and the Hebrides. 361 



The beds numbered 5, 6, 7, may be considered as subordinate to the inferior 

 oolite; No. 5 only differing from No, 7, in not having nodules of the same 

 enormous size, and in exhibiting in its upper portion a passage into the car- 

 boniferous sandstone. Shale, No. 6, is thus decidedly included in the inferior 

 oolite. These alternating beds of sandstone and shale are both in their mode 

 of grouping, character, and contents, identical with the strata above the alum 

 shale on the Yorkshire coast. All this section, from the great white sand- 

 stone. No. 3, which forms the principal projecting terrace of the plateau, is 

 best seen at one view from a small waterfall, situated about half way between 

 the Prince's Cave * and the western termination of the escarpment. This 

 waterfall successively exposes each of the formations, and shows in a remark- 

 ably distinct manner the shale overlying the lowest or fossil beds of the 

 inferior oolite. 



The deposits of the oolitic series have further been observed extending to 

 several localities where they had not been previously noticed. On the North- 

 east coast of Mull, at or near Tobermory, the sandstone of the inferior oolite 

 is quarried for building, and is seen resting upon lias, containing the Gry- 

 phaBa incurva, the whole being overlaid by zeolitic trap. The same secon- 

 dary formations are found on the mainland side of the Sound of Mull, in Mor- 

 vern and Airdnamurchan, indicating a probable continuity at a former period 

 with those of the islands. Lastly, we discovered lias limestone at Applecross, 

 on the western coast of Rosshire, directly opposite to the great development 

 of the same system in Skye, Rasay, and Pabba. At Applecross the beds rise 

 from the southern shore of a small bay, at a gentle inclination, to the height 

 of several hundred feet above the sea level, and repose upon the red-sand- 

 stone of the western coast, which here swells into very lofty mountains, the 

 strata dipping to the N.W. 



A section near the mill at Applecross exposes the following beds associated 



with the lias limestone. 



No. 1. Beds of shale and sand slightly calcareous with many imperfect fossils ; — one foot to one 

 and a half. 



2. Blueish limestone containing wood, pentacrinites, gryphites, ammonites, pinnae, &c., with 



sand occasionally interposed ; — two to three feet. 



3. Calcareous gray gritty limestone, compact, quartzose, and void of fossils, but charged 



with veins of carbonate of lime ; — four feet. 



4. White conglomerate with quartz pebbles, cemented by calcareous matter; — three feet. 



* One of the numerous stalactitic caves on the shores of these islands : it is said to have 

 afforded shelter to the unfortunate Charles Edward. 

 VOL. II. — SECOND SERIES. 3 B 



