1873.] BRYCE JURASSIC ROCKS OF SKYE AND RAASAY. 335 



the paper already quoted. These are Ammonites Conybeari (Sow. 

 Min. Conch, tab. 131), Oryphcea gigantea (ibid. tab. 371), and Pli- 

 catula spinosa (ibid. tab. 245), all of which are said to have been 

 found at Scrapidale, which is near the northern termination of the 

 beds. They are merely named as having been found there ; no 

 mention is made of the beds, nor is any description or section given. 

 The Kaasay sections present a succession very similar to those 

 already given ; it will therefore be unnecessary to multiply sections, 

 or to dwell long on one. 



Tracing the beds along the Hallaig shore, we find the Middle 

 Lias occupying the coast-line till the stream is reached which 

 descends to the sea on the south side of the headland Eu-na-Leac. 

 This stream flows along the course of a fault, on the north side of 

 which the Ehsetic and Lower Lias are brought up against the 

 Middle Lias and Inferior Oolite. These lowest Secondary strata, 

 seen only at this place, occupy the whole of the bay included 

 between Eu-na-Leac and a cliff to the north, which, for convenience 

 of reference, I name Waterfall Cliff, conspicuous by the cascade 

 which the Hallaig burn forms in its precipitous descent to the sea. 



The base of the Eu-na-Leac cliff is a basaltic sheet, on which 

 rest thick beds of breccias and conglomerates, composed of Torridon 

 sandstone and quartzites, with included patches of coarse quartzitic 

 sandstones, succeeded by finer conglomerates, coarse sandstones, and 

 mottled sandstones. These rocks are unfossiliferous ; but as they 

 are conformable to the overlying Lower Lias, they may be regarded 

 as of Ehastic age. 



On the north side of the bay the Lower Lias occupies two scarped 

 cliffs — the undercliff consisting, as far as seen, of compact blue lime- 

 stones, weathering white, shales, and oyster-bands. The few fossils, 

 in conjunction with the stratigraphical position, serve to fix the 

 horizon as that of the zones of Ammonites planorbis and A. an- 

 gulatus. 



The higher cliff is composed of alternations of shales, gryphite 

 beds, and earthy limestones below, passing up into sandy beds and 

 calciferous sandstone, with the common fossils of the zone of Am- 

 monites Bucllandi. The upper part of the cliff is a greenish-yellow 

 calcareous sandstone, with scattered Gryphcea arcuata. 



The dip of the Ehsetic beds of Eu-na-Leac is as much as 20° ; 

 but that of the Lower Lias diminishes to 10° and 7°, with a breadth 

 of outcrop of 3000 feet ; the estimated thickness of the Ehaetic and 

 Lower Lias is 700 feet, 150 feet at least of which belongs to the 

 Ehaetic. 



The higher beds of the Lower Lias in the Waterfall Cliff come 

 down to the sea-shore, proceeding northward; and now a sudden 

 change in the lithology and life takes place. The almost unfos- 

 siliferous sandstones are surmounted by soft micaceous shales, with 

 lines of ironstone doggers, and crowded with well-preserved fossils, 

 prominent among which are large specimens of Ammonites armatvs, 

 rugose examples of Hippopodium ponder osmn, Plioladomya decorata, 

 &c. These arc succeeded by sandier and harder shales, with Am- 



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