Re RETESET” ote ~ 
ee 
Drawing near to the limits of our time and space, when very 
recently most of the geological reports of the season came in, we 
Shall give them such notice as may be in our power. In Vol. 
xxxii. No. 1, several of the geological reports were mentioned 
one year since. We have not received the continuation of all of 
them ; those of Maine* and New York, of Maryland and of Vir- 
ginia, for the present season, have not been received, while those 
of Ohio, of Pennsylvania, of Indiana, of Michigan, and of Ten- 
nessee, are before us. 
Tennessee—Ath Report, by G. Troost, M. D., Geologist to the 
State, Prof. of Chem. Min. and Geol. Nashville Dscvormty, Mem- 
ber of the Geological Societies of France and Pennsylvania. 
This report is confined chiefly to the rock formations of the 
district of Ocoee, of which a colored map and section are given 
on a scale of 21 inches by 19. This district lies in the S. E. an- 
gle of Tennessee, touching Georgia on the S., North Carolina on 
the N. W., the Tennessee river, the Hiwassee river and ranges of 
mountains, 
Dr. Troost gives a preliminary sketch of elementary geology, 
with occasional illustrations from local facts, which occupies 
about half the report. He informs us, that in Tennessee there 
are no strata between the coal and the marl or green sand of Eu- 
rope ; all the intermediate sandstones, oolites, &c., which make 
so great a figure in England, are wanting in Tennessee, and it is 
not certain that they have been found any where on this conti- 
nent. The order of arrangement exhibited in the section pre- 
sented by Dr. Troost, is, beginning below, primordial rocks, 
grauwacke, mountain limestone, coal measures. Jt appears that 
in Tennessee “the grauwacke series is overlaid by an immense 
deposit of sandstone, which forms isolated ridges and mountains,” 
unstratified so far as appears, color gray, and no organic remains ; 
this rock he regards as equivalent to the old red sandstone of Eu- 
ropean geologists. 
The carboniferous or mountain limestone is the most extensive 
of the rocks of the western country, and the most replete with 
organic remains; there are many varieties of rocks connected 
With it, and next above lie the coal measures, composed chiefly 
of strata of coal, sandstone and shale, with large deposits of ar- 
gillaceous iron ore. 
* A partial report of some important facts in Maine, is given by Dr. Jackson in 
our last number, 
