
18 CRETACEOUS GROUP 
traversed by iron crusts, and containing large masses 
of primitive rocks. Depth 35: feet. 
2. Argillo-micaceous sand, of a dark blue color. Or- 
ganic remains few and indeterminate. Depth 28% 
feet. 
3. “Argillo-ferruginous sand, of ‘a greenish color, 
abounding in Ammonites, Baculites, Pholadomyz, 
Lignite, Succinite &c. Depth, 4 feet. 
4, Coarse gray sand, with similar organic products as 
No. 3. Depth 7 feet. This stratum forms the bottom 
of the canal, but the excavation was made six feet 
deeper for experimental purposes. 
5. Argillaceous sand, of a dull green color, which it 
imparts to water. Organic remains same as in the 
last beds. Depth 3 feet. 
6. Coarse gray sand, which was penetrated about three 
feet, but no fossils were observed. 
Section, No. 2. Pl. 14, lower figure. ‘Taken 484 
yards west of section No. 1. Vertical depth 623 feet. 
1. Ferruginous gravel and sand. Dzluvial. Depth 9 
feet. 
2. Black tenaceous clay. Depth 7 feet. 
3. Ferruginous brown sand and clay, containing a. pro- 
fusion of Ammonites and Baculites, with Scaphites, 
Lignite, Succinite, and casts of various simple uni- 
valve and bivalve shells. Depth 23 feet. 
4. Blue micaceous sand and clay, with similar fossils to 
No. 3. 
5, Ferruginous sand and clay, of a dull green color, 
