944 Notes, principally Geological, from [No. 130. 



fissures in the walls commencing at the base, and proceeding upwards, 

 mark the site of future and extensive ravages. The masonry on the 

 firmer parts of the rock is in excellent preservation : if well selected, it 

 would make a good building stone, and is capable of receiving a fine 

 polish, as shewn in the bas relief round the Sijdeh recess in that little 

 gem of Moorish architecture, the Mecca Mosque within the citadel, 

 which is constructed of the more compact variety of the purplish amyg- 

 daloid just mentioned. 



The basis of the rock is felspar, with amphibole and augite in various 

 proportions. The latter mineral (augite) is not much seen in the red 

 amygdaloid rock. Olivine is of rare occurrence. Vesicles are seen in 

 all varieties, both empty and containing green earth, which becomes 

 brown or black on long exposure, calcedony, cacholong, calc spar, 

 quartz, zeolites chiefly radiated, stilbite, heulandite, and mesotype, 

 when it assumes an amygdaloidal stamp. These minerals also occur 

 in veins, and are most abundant in the red amygdaloid, to which 

 they impart a reticulated or porphyritic appearance, as they chance 

 to occur in veins or crystals. Geodes of calcedony are seen also con- 

 taining drusy crystals of quartz and of zeolite, enclosing crystals of 

 carbonate of lime. I have seen veins of crystalline quartz splitting 

 in the centre, in a direction parallel to the sides, containing all these 

 minerals on their inner surfaces. Agates are sometimes, but rarely, 

 found imbedded; greyish crystals of glass of felspar are met with in 

 the semi-compact varieties; also small nodules of 'a compact cream 

 coloured opaque zeolite with a faint tinge of buff, and marked with 

 concentric annular delineations, resembling in shape those in orbicular 

 granite.* 



Marched this morning, (July 9th,) on the new route to Hukli, a 



From Bijapore to place about twelve miles S. E. from Bijapore. 



agwan. rpj^ ^ rown so ji } arising from the disintegration 



of the subjacent trap continued about a mile, when it was succeeded 



by the regur, strewed with abundance of grey kanker in small nodules. 



* Some of these nodules are earthy, and have a powerful argillaceous odour. The 

 most compact have a hardness about seven (Moh's) fracture semi-conchoidal, inclined 

 to splintery— opaque. Before the blowpipe they intumesce, and phosphoresce slightly. 

 They gelatinize when treated with nitric and muriatic acids. Some of them inclined 

 acicular, microscopic and minute crystals of a mineral resembling chabasite. 





