DISINTEGRATION OF ROCKS. 137 



afforded specimens of granite with red felspar, 

 gneiss with black mica, common quartz, and 

 a large grained white felspar, with a little 

 admixed quartz. Upon a small islet near 

 the Norways, common quartz, with some disin- 

 tegrated felspar. At the termination of the 

 mountain ridge, which forms the eastern side 

 of Foul Sound, we procured, near the summit, 

 quartz rock with some mica, fine grained granite, 

 and white felsparic rock, with quartz ; and, from 

 a considerable block at its base, large grained 

 white felspar, with a little admixed quartz. 

 About twenty miles north of Cloven Cliff, we 

 brought up, from a depth of one hundred and 

 eighty-four fathoms, two specimens of rock, the 

 one common granite, the other fine grained grey 

 sandstone. 



In other parts of Spitzbergen, the. coast has 

 as yet been so imperfectly explored, that we 

 are not even sure we know its limits, and, per- 

 haps, mountains higher than those above-men- 

 tioned may yet be found to exist. 



About Fair Haven the mountains which came 

 under our observation appeared to be rapidly 

 disintegrating on the surface^ perhaps from the 

 great absorption of wet during the summer, and 

 the dilatation occasioned by the frost in the 

 winter. Masses of rock were, in consequence, re- 



