Miscellanies^ 187 



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 — 4th Report, by G. Troost, M. D., Geologist to the 

 State, Prof, of Chem. Min. and Geol. Nashville University, 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. It 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. Jackf3on in 

 our last number. 



