484 



Stattsiics of the Circar of Doxvhttabad. [No. 36, 



ing tardily onwards, had met with some obstruction, and hardened in 

 the act of receding from the obstacle. Very remarkable fistulous 

 cavities are seen in this rock filled with zeolitic or calcareous spar, 

 or having merely tlie sides coated with green earth. These tabular 

 bodies are all observed to be disposed at right angles to the surface 

 of the rock they are imbedded in. 



10. Earthy Clay Stone. An ochreous bed of red earthy clay 

 stone, if often seen lying under, and upon, the same description of 

 rocks as the preceding variety, is associated with and is apparently 

 the same rock modified by circumstances : its breadth is the same, 

 but is generally found as a soft earth, occasionally passing into a 

 rock resembling earthy jasper : when in its soft condition it sepa- 

 rates into verticarmasses with a conchoidal fracture, flying into nu- 

 merous fragments from ihe slightest blow of the hammer. 



11. Earthy Lime Stone. A rock abounding in the amygdaloid 

 wacke strata, occupying veins and seams and particularly plenti- 

 ful towards the lower portions of the hills. 



12. Calcareous Tufi". Very extensive formations of this substance 

 are met with occupying beds of various depths along the lower 

 levels of the valleys, and near the base of the hills, often assuming 

 the character of a semi-crystalline body. 



13. Jasper. This mineral occurs in large beds amongst the 

 amygdaloid wacke, assuming various shades of green, yellow, red, 

 and black, the blending together of ^'^hich in spots and veins, gives 

 the rock a truly splendid appearance, its edges are translucent, 

 with the exception of the black varieties. Heliotrope occurs also 

 in great abundance. 



The following minerals are those principally found in the amyg- 

 daloid beds. 



Eaethy Mines als. 



Silica, — Eose Quartz, 

 Milk Quartz, 

 Eock Quartz, 



Amethystine Quartz, 

 Semi Opal, 

 Chalcedony, 

 Heliotrope, j Stilbite, 



Cachalong, ; Hornblende 



Hornstone, Augite. 



Eed and white Cornelian, 

 Agate, 

 Moss Agate, 

 Onyx, 

 Jasper, 

 Henlandite, 



