Wincliell.] '" [March 5, 



No. 2. Bluisli-brown Limestone with corals. 8 in. 



No. 1. Yellowish Sandstone, passing downward into a bluish indurated 

 clay. Fossils rare. 68 feet and more. 



In Missouri we are furnished with the following series of rocks -.^'^ 

 Encrinital Limestone, regarded as equivalent to the Burlington Limestone. 

 Chouteau Limestone. 10 to 70 feet. 



Limestone, brownish-gray, earthy, silico-magnesian, in thick beds. 40 

 to 50 feet. 



Limestone, blue or drab, compact, tliin and irregularly bedded. 

 Vermicular Sandstone and shales. 30 to 100 feet. 



Sandstone, buff or yellowish-brown, fine-grained, argillo-calcareous. 

 Sometimes becomes an impure magnesian limestone. 



Shale or fire-clay, blue or brown, argiUaceous, in regular, thin strata. 

 Lithographic Limestone, light drab to light buff and blue, pure, fine, 



compact, even-textured, silicious. 60 to 70 feet. 



At bottom is a blue shale 30 to 40 feet thick. 



In Kentucky, according to my own observations, we have at Knob 



Lick and Pine Knob, four miles south of Danville, the following section : 



Sandstone, yellowish, from top of Knob down. 150 feet. 



Shale, blue, arenaceous, with bands of iron ore and ferruginous sand- 

 stones, forming the phenomenon known as "Knob Lick." 80 feet. 

 [Resembles shales of Huron Group. ] 



Black Shale, only moderately bituminous. 40 feet. 



Silicious and Geodiferous Beds, containing Gystipliyllum Americanum, 

 PJiiUipsastraa gigas, Heliophyllum Halli, FistuUpora Canadensis and 

 other Hamilton fossils. ^^ 



Hydraulic Limestone, blue, arenaceous, very thick bedded, with frag- 

 ments of fossils. 12 feet. 



Nashville Group. 



In Tennessee the Black Shale rests directly upon the Nashville group, 

 and is overlaid by about 150 feet of the "Silicious Group," in the very 

 lowest beds of which I have recognized Producta semireticulata, OrtMs 

 Michelini, Spirifera Logani, and an undescribed Zaphrentis, which, with 

 the Spirifera, is regarded as characteristic of the Keokuk Limestone. ^^ 

 Above the Silicious group we have 394 feet of cherty limestone, mainly re- 

 ferable to the St. Louis division, '°° since it contains Lithosirotion Canadense, 

 Producta semireticttlata, Sti'eptorhynchus umhraculunij Spirifera Keokuk 

 Var, S. perinflata ? The presence of RJiynclionella Yerneuiliana indicates 

 that the Warsaw limestone may also be represented in the lower portion 

 of this formation. Next above we have 603 feet of limestone abundantly 



9T Swallow— Neo. Geolo. Keport, I., 101 and Tab. 15, p. 99; Meek and Worthen— Amer. Jour. Sci. 

 2] xxxli., 171. 



58 D. D. Owen speaks of no Devonian in this part of Kentucky except the Black Shale. He, how- 

 ever, speaks of Upper Silurian rocks; these I have not seen. 



i» These fossils were collected in Hickman and Maury counties, and kindly furnished me by Prof. 

 Safford. 



i"" In its physical characters this cherty limestone is a continuation of the Silicious Group, and 

 Prof. Safford informs me that he so treats it in his forthcoming Keport. 



