20 CONTKIBUTIONS TO DEVONIAN PALEONTOLOGY. [bull.244 
BROOKS, BULLITT COUNTY, KY. 
A connected section of the rocks in the vicinity of Brooks station, 
about 15 miles south of Louisville, is made up of beds exposed at the 
three following localities: (A) Brooks, Bullitt County; (B) Button 
Mold Knob, three-fourths mile northeast of Brooks; (C) 1 mile west 
of Brooks. The general section is as follows: 
Generalized section 1365, near Brooks, Ky. 
Feet. 
C2. Massive sandstone 40 to 50 
CI. Sandy shale and sandstone 50 to 75 
Bl. Blue clay shale 50 to 65 
A3. Black shale (New Albany) 15 to 30 
A2. Limestone ( Devonian ) 2 to 6 
A 1 . Limestone and sandstone ( Niagara) 15 to 20 
172 to 246 
The black shale (A3) rests unconformably on the Devonian limestone 
in the vicinity of Brooks. In the bed of Brooks Run, between the 
railroad and the wagon road, the lowest strata of the black shale lie 
in shallow, irregularly eroded pockets in the limestone. In some of 
these a thin layer of reddish clay was observed between the limestone 
and the undisturbed black shale. The unconformity is illustrated in 
the accompanying figure. 
Fig. 1.— Section on Brooks Run, Bullitt County, Ky., showing unconformity between (black) New 
Albany shales and the Devonian (Jeffersonville) limestone. 
One-half mile northeast of Brooks the shale (New Albany) has a 
drab color, and furnished the following faunule: 
Faunule of zone 3 of general section 1365 A, near Brooks, Ky. 
[c, common.] 
1. Lingula spatulata (c). I 3. Leiorhynchus cf. quadricostatum (c). 
2. Chonetes scitulus (c). I 4. Pleurotomaria sp. (c). 
The upper argillaceous member of the Devonian (Sellarsburg beds), 
which is worked for cement at Louisville, is entirely wanting in this 
section. The Devonian limestone in the section represented by tig. 1 
probably does not exceed 2 feet in thickness. Below it is the siliceous 
Niagara limestone (Al), which outcrops in the wagon road and con- 
tains the following species: 
Faunule of zone 1 of general section 1365 A, near Brooks, Ky. 
[e, common.] 
1. Favositesniagarensis (c). ) 2. Halysites catenulatus (c). 
