Geology, &c. of the Connecticut. 75 
er points of resemblance, but I have not been able to find 
any minute account of the bituminous marlite formation.* 
On the other hand it may be said that no real bitaminous 
marlite occurs along the Connecticut—provided the grand 
distinction between this rock and bituminous shale consists, 
as Professor Cleaveland ‘Says, (Mineral. vol. 1, p. 191,) in 
its effervescence with acids; for our rock, certainly that at 
Sunderland, does not ilervesee with acid, unless it contains, 
as it sometimes does, a slight incrustation of carbonate of 
ime. Mr. B. does not consider the occurrence of thin 
beds or veins of coal as opposed ,to his. opinion; but the 
strata penetrated at Riegelsdorf in Hesse, in order to reach 
the fish i eh arama are totally different from those occur- 
_ ting along the Connecticut. They are as follows: “ No. I. 
F erruginous clayey ponere from one to two fathoms. No. 
_ 2, Greyish white limestone, from six to eight fathoms. 
No. 3. Blue tay rib tea es fre ments of selenite 
erystals, from eight to. ten ten fathoms. is. No. 4. Bluish pige- 
5. Grey compact gypsum, traversed by. frnipaein ioani, 
from seven to eight fathoms. No.6. Black and ere stink- 
stone, from one to one and an half fathoms. No. 7. San 
sometimes loose, sometimes cemented, from one to one and 
an half fathoms. No. 8. Akind of limestone, called Zech- 
stein, of a greyish brown color, and soft above towards the 
sand, but blacker and more compact below; from three and 
a quarter to three and an half fathoms. No. 9. A black 
slaty stratum, containing pyrites and forming the roof of the 
bituminous marl slate, from eighteen to twenty inches. No. 
_ 10. Black cupriferous bituminous marl slate, from three to 
eight — : this is the principal pen of the a 
*Extra ct ofa ind from Dr: J. W. Webster:— 
“The bituminous marl te has been one of the most troublesome rocks 
he two—vegetable impressions are abundant in pe dese shale of 
the coal field ; but rare in the B. M. slate—it is more abundant in fresh 
water remains.”’ 
