APPENDIX. 



mark of decay, and fit for forming the most durable build- 

 ings. Mr. Fichtel, who has been so kind as to look over my 

 specimens, and to assist me with his opinion concerning their 

 nature, thinks that the stone of Mahabalipitra consists of a 

 mixture of arid and of fat quartz ; and although he calls the 

 stone of the Ghats granite, I have no doubt of its component 

 parts being the same with those of the Mahabalipura stone. 



<e Both these rocks appear to be stratified j but the strata 

 are wonderfully broken and confused. In some places they 

 are almost horizontal, in others they are vertical, with all 

 intermediate degrees of inclination. Sometimes the decaying 

 stratum lies above the perfect, and at other times is covered 

 by it. I saw many strata not above three feet wide ; while 

 in other masses of eight or ten feet high, and many long, I 

 could perceive no division. 



" Immersed in both kinds I observed many nodules, as 

 large as the head, which were composed of a decaying sub- 

 stance containing- much green mica. In other places there 

 are large veins, and beds, containing small rhomboidal masses, 

 of what Mr. Fichtel takes to be a composition of a small pro- 

 portion of quartz with much iron." * 



Of the hills near Cavery. 



(( The strata on these hills are various. I saw red granitic 

 porphyry, and took specimens of a fine-grained gneiss, con- 

 sisting of pale red felspar, white quartz, and black mica. 

 The most common rock, however, is the hornblende slate 

 with quartz, which I have before mentioned. When exposed 

 to the air in large high masses, so as to prevent the water 

 from lodging on it, the pieces decay into fragments of a 

 rhomboidal form 5 but when exposed to the air on a level 

 with the ground, so as to be penetrated by the rain water, it 

 divides into thin lamina?, like common schistus."f 



* Vol. i. p. 27. f Vol. i, p, 59. 



