312 SKY. GEOLOGY. SECONDARY STRATA. 



the limestone in the same order and with a corresponding 

 inclination. We may safely consider these separated 

 parts as consecutive strata, and as continuous with the 

 limestone, under the water by which they are divided. 

 From this place to Conurdan nothing but trap is to 

 be seen, and the first indication of the strata to be 

 observed, is an irregular and thin bed of sandstone in- 

 terposed between the trap, incurvated and without as- 

 signable dip, but of the same calcareous composition 

 and displaying the same spheroidal concretions as the 

 sandstone of Rasay. If these characters are not held 

 sufficient to determine its order with respect to the 

 strata at Sligachan, countenanced as it is by the pa- 

 rallel appearances in Rasay, the chasm must remain; 

 although I have little doubt that geologists will con- 

 sider the strata at Conurdan to appertain to those on 

 the northern shore of Sligachan, and (abstracting the 

 trap) to be the first in immediate superposition on the 

 gryphite limestone. 



Proceeding northwards from this place along the 

 eastern shore, the hill of Camiskianevig* rises suddenly, 

 terminating in the sea by high cliffs. These are formed 

 of a thick series of sandstone beds, surmounted by 

 trap, and characterized by the same concretions as that 

 of Conurdan; while they correspond in dimensions with 

 the sandstone of Rasay on the opposite side of the 

 strait. These beds disappear near the bottom of Portree 

 harbour, not in consequence of their dip, but because 

 they are cut through by the same mass of trap that 

 surmounts them. On the north side of the harbour 

 they re-appear with the same dxnensions and characters, 

 but after a certain progress are again cut through by 

 the superincumbent trapj, and thus divided down to 

 the sea by a mass of that rock nearly a mile in breadth. 

 They are again repeated in their original characters and 



* Thus pronounced : in the Map, Cambustainabheig. 



