14S Professor J ameson on Secondary Greenstone and Wacicc. 
The rocks we are now to describe, rest oil the lowest visible 
portion of this bed of porpliyry, and have the same easterly dip 
and angle of inclination with the porphyry on which they repose. 
1. Bituminous Shale. 
The first or lowest bed of the section, that which appears to 
rest immediately on the porphyry, is bituminous shale, about 
eight feet thick. 
' 2. Wache. 
Immediately above the shale is a bed of greyish-green colour- 
ed wacke, upwards of twenty feet thick. 
3. Bituminous Shale and Sandstone. 
Resting upon the wacke is a bed of bituminous shale about 
five feet and a half thick. In the shale there are beds of com- 
pact sandstone, one of these ' nearly a foot thick, and also thin 
layers of clay ironstone. 
4. Wache. 
The next bed, which is about twenty-five feet thick, is green- 
ish-grey coloured wacke, disposed in globular and angular con- 
cretions, in which the surfaces have a purplish colour. It is 
traversed by numerous very thin veins of calcareous spar. 
5. Bituminous Shale and livnstone. 
This bed, which rests on the preceding, is about two feet and 
a half thick, and consists of bituminous shale, with thin beds 
of clay ironstone. 
6. WacJce. 
This bed of wacke, which rests on the preceding, is about 
eight feet thick. It is to be observed passing into bituminous 
shale. 
7. Bitu7ninous Shale and Ironstone^ 
This bed, which immediately follows the preceding, is bitu- 
minous shale, with subordinate beds of clay ironstone, and is 
about five and a half feet thick. 
8. Wache. 
This is one of the most considerable beds in the section, being 
about thirty-four feet thick. It is every where traversed by 
numerous veins of calcareous spar. 
