82 IOWA ACADEMY OP SCIENCE 



FEET INCHES 



2. Shale, gray, weathered 2 



1. Sandstone, light blue, indurated, of fine 



texture, in straight layers below, and 

 ripple marked above 3 



Total . 18 6 



Lower strata are found in a coal shaft near one of the out- 

 crops. 



RECORD OP BAYLORS SHAFT SOUTH OP THURMAN. 



FEET INCHES 



6. Blue limestone 3 



5. Sandstone 5 



4. Shale 20 



3. Limestone 6 



2. Coal, Nyman 1 2 



1. Shale and sandstone 



Total 29 8 



What is thought to be the same limestone and sandstone is 

 seen on the wagon road about one mile north of Thurman. The 

 Nyman coal outcrops in the banks of Plum creek one-fourth mile 

 east of the village. 



A feature unusual in Iowa geology takes place between the 

 north outcrop and the Wilson section about one mile distant. 

 There is a break in the strata upwards of three hundred feet, and 

 as a result the Forbes limestone and Nyman coal each have the 

 same elevation above the flood land of the Missouri river. The 

 sandstone beneath the main limestone at the Wilson section is 

 not the same as that near Thurman ; the latter is blue, indurated, 

 ripple marked, and three feet thick, while the former is yellow, 

 friable, micaceous, and eight feet thick in the old quarry east of 

 Haynies. The texture and contained spheroidal lumps in the lime- 

 stone at Thurman, Hamburg, McKissicks Grove, and Mill creek 

 are the same at each place. As this limestone becomes arenaceous 

 at these southern localities it loses its fossils, and farther south 

 in the state of Missouri grades into sandstone and cannot be 

 recognized. 



The possibility that the coal at Baylors shaft is the Elmo coal 

 has been considered. These two localities have been personally 

 visited, and compared, but as a result the conclusion arrived at 

 is decidedly against such correlation. 



