Strophomena and Other Fossils 
49 
Madison county, and thence westward. Along the southwestern 
line of Madison county, about 1 mile north of Paint Lick, the fol- 
lowing section is exposed. 
Base of Tate layer. 
Argillaceous limestone with Platystrophia pjnderosa 4 ft, 
Unfossiliferous argillaceous shale 8 ft. 
Shaly limestone with Orthorhynchula linneyi and Platystrophia pon- 
derosa common 24 ft. 
Limestone and limestone rubble with Platystrophia ponderosa . . 15 ft. 6 in. 
Strophomena maysvillensis at top, middle, and base of section, but 
not common 9 ft. 
Interval. 6 ft. 
Strophomena planoconvexa rare. 
Interval 7 ft. 6 in. 
Strophomena 7naysvillensis very abundant 2 ft. 
Base of Fairmount. 
Argillaceous limestones interbedded with clay. Strophomena ?nays- 
villensis common on the upper surfaces of many of the limestone 
layers, but not as abundant as at the base of the Fairmount 28 ft. 
Brachiospongialaevis. 
Argillaceous limestone with Strophomena rnaysvillensis, forming the 
base of the Mount Hope 2 ft. 6 in. 
Cross-bedded, argillaceous limestone, forming the top of the mas- 
sive argillaceous rock section which may be called the Paint Lick 
division of the Garrard. About . 6| feet below the top of this 
section Stropho7nena 7naysvillensis makes its first appearance. 
The total thickness of the Paint Lick division is about 60 ft. 
In the preceding section, the occurrence of Strophomena mays- 
villensis in the upper part of the Paint Lick section should be 
especially noted. 
Along the railroad, about 2 miles northwest of Richmond, 
the Tate layer has a thickness of about 30 feet. Most of it is 
thin-bedded or shaly. The following section is exposed. 
Base of Tate layer. 
Orthorhynchula lin7ieyi very abundant 5 ft. 6 in. 
Orthorhynchula linneyi associated with Platystrophia ponderosa .5 ft. 6 in. 
Rough argillaceous limestone with Platystrophia ponderosa. . . .5 ft. 6 in. 
Interval 5 ft. 6 in. 
Escharopora hilli and Strophomena planoconvexa 5 ft. 6 in. 
Strophomena 7naysvillensis in moderate numbers near top and resem- 
bling Sirophornena planoconvexa. Typical forms of Strophornena 
maysvillensis near the base 22 ft. 
Mount Hope member, with Strophomena rnaysvillensis only in mod- 
erate numbers. 
