

wiluamb.] TAYLOR, TROOST. 37 



Of fossils he named the following as occurring in these beds: " Pro- 

 ducta and Crinoidal remains, and occasionally Fucoides, Carophyllea, 

 Pectens, and ISpirifer are interspersed." This is, apparently, the first 

 identification of the Chemung group, as it is now called, of the Upper 

 Devonian. 



He discussed 1 "a section passing through the bituminous coal field 

 near Bichmond, Virginia," and gave a full account of "these interest- 

 ing beds of coal," which he regarded as "probably of Transition age" 

 rather than Secondary, to which position Mr. Maclure referred them. 



At that time, apparently, the fossils had not been studied, ignorance 

 in regard to which left the geologists in the dark as to the true position 

 of these Mesozoic deposits. 



An account is given 2 of studies of sections for 250 miles across Vir- 

 ginia and Maryland. In the discussion the Primitive, Transition, Old 

 Red, and Secondary rocks are recognized, and the Fredericksburg 

 plant beds were referred 3 to the "Oolitic" of Europe. 



In another paper the coal beds of the Alleghany Mountains are called 

 "Secondary, with Old lied Sandstone lying under them," and on the 

 other side of the anticline were seen other coal beds, which Mr. Taylor 

 called " Transition." A cut is given 4 presenting the true relations of 

 the Chemung and Blossburg deposits, but the Blossburg coal is re- 

 garded as Secondary. 



In the same Transactions, 5 Edward Miller described a portion of the 

 Alleghany Mountains, in which ho recognized the coal formations as 

 belonging to the " Coal Measures." 



Gerard Troost, 6 in a paper on certain Pentremites found in Tennessee, 

 Alabama, and Kentucky, identified the rocks of Perry County, Tennes- 

 see, as "a stratum below the Coal Measures," regarded by him as "in 

 the Upper Transition." In the same rocks with the Pentremites were 

 found TrilobiteSj Calceola sandalina, Calamopora, Terebratula, Spirifera, 

 Producta, etc. 



In some cases the limestone had an oolitic structure. The limestone 

 near [Nashville, Tennessee, was referred to the " Mountain limestone of 

 the English." The conclusion is that the beds containing the Pentre- 

 mites of these Southern States characterize "the Upper Transition 

 limestone " of the interior of America. 



The same author 7 wrote " On the organic remains which character- 

 ize the Transition series of the Valley of the Mississippi." In this arti- 

 cle he included " Mountain limestone" in the " Transition strata," be- 



1 On pp. 275-294. 



2 On p. 314. 



3 Vol. 2, pp. 177-193: "On the relative position of the Transition and Secondary coal formations in 

 Pennsylvania, and description of some Transition coal, or bituminous, anthracite, and iron-ore beda 

 near Broad Top Mountain, in Bedford Conuty, and of a coal vein in Perry County, Pennsylvania, with 

 sections." 



* P. 194. 



8 Vol.1, p. 251. 



6 Ibid, pp. 224-231. 



7 Ibid., 248. 



