62 IOWA ACADEMY OF SCIENCES, 



(1.) Capital City Brick and Tile Works. This plant 

 is located south of the city. Seven samples were taken 

 which were representative of the principal layers. The 

 following is a description of each, beginning at the top: 



Thickness 

 in fi'et. 

 C — 0. Clear, medium light drab with slight seams of rust, 



mastic, very slightly gritty 7 



C — 1. Shale, mottled and streaked maroon to sea green, 



greenish and purplish brown, rust in seams.... 4J^ 



C — 2. Shale, medium dark bluish drab, clean 7 



C — 3. Bastard fire clay, mottled purplish blue, dark gray, 



slight rust in seams 4 



C — 4. Shale, soapy, but containing some grit, clear 



grayish drab ] 5 



C — 5. Shale, very dark greenish gray with slight seams 



of rust 1>^ 



C — 6. Shale , clear blue sandy 10 



(2.) lowA Brick Company. The works of this company 

 are located in the northwestern part of the city on the 

 opposite side of the river from the Flint Brick Company. 



Nine samples were taken from this ])it. The following 

 is a description of each of the different strata, beginning 

 at the top : 



Tliiekness in 

 Feet. 



1 — 1. Shale, variegated, reddish brown, mahogany reds, 

 yellowish, bluish drab, dark gray, almost black; 



the colors mottled parallel to bed 6 



I — 2. Sandy, light yellowish white, solid color 6 



I — 3. Slightly sandy at top to clear shale below, pale blue 



streaked with chocolate brown 5 



I — 4. Shale, clear chocolate brown 4 



1 — 5. Shale, granular, dark solid drab with reddish pur- 

 ple nodules 3 



1—6. Shale, bluish drab 6 



I—6i Same as No. 6. exposed at western end of cut, 



weathered ? 



I — 7. Shale, streaks of brownish drab and greenish, to 



chocolate brown. Stratification well defined... . 6 

 I — 8 . Clear dark drab , with orange green tinge 2 



(3.) The Des Moines Brick Manufacturing Company is 

 located in West Des Moines, between the tracks of the C, 

 R. I. & P. R'y and the Des Moines & Northern U'y. 



