S9f5 



GEOLOGY OF EASTERN WISCONSIN. 

 ANALYSES OF CEMENT ROCKS. 



Kind of Rock. 



Milwaukee, No. 1 



Milwaukee, No. 2 



Milwaukee, Layers 2-6 .... 

 Milwaukee, Layers 7-11 . . , 

 Milwaukee, Layers 2-11 ... 



Milwaukee 



Milwaukee, Wash. St. bridge 

 Milwaukee, Wash. St. bridge 



Milwaukee, average 



Rosendale, New York 



TJtica, Illinois 



Utioa, lUinois 



Akron, New York 



Akron, New York 



Sandusky, Ohio 



Points! aux Roche, L.Champ'n 



Cumberland, Maryland 



English 



Bologna, France. 



Vassy, France 



TheH, France 



Authority 

 analysis. 



Bode .... 

 Bode .... 



Bode 



Bode .... 



Bode 



Doremus . . 



Bode 



Bode 



,p 



Gihnore. . . . 

 GUmore. . . . 



Reid 



Gilmore . . . 



Reid 



Reid 



Reid 



Gilmore .... 

 Berthier . . . 

 Drapies 



Reid 



46 

 50 

 58 

 35 

 85. 

 40. 

 ■53. 

 41. 

 65. 

 61. 

 63. 



.54 

 .29 

 55 

 09 

 .44 

 .57 

 .34 

 .05 

 11 

 .00 

 42 

 84 



o 



60.00 



.32.46 

 29.19 

 30.91 

 24.95 

 31.27 

 27.67 

 34.88 

 35.82 

 30.89 

 17.76 

 18.67 

 15.38 

 19.26 

 19.26 

 17. 

 22.60 

 4.10 

 0.50 

 0.00 

 1..50 

 1.82 

 



78.00 



77.48 



78.46 



72.04 



76.71 



73.24 



76.22 



75.87 



76.00 



63.76 



69.09 



64.22 



64 



•54.86 



58.52 



75.90 



45.90 



66.20 



61.60 



65.30 



61.32 



17.56 

 17.56 

 13.74 

 18.77 

 15.65 

 15.60 

 16.99 

 17.00 

 16.61 

 .27.70 

 21.60 

 25.20 

 33.80 

 33.80 

 19.66 

 20.07 

 21.74 

 18.00 

 15.00 

 14.00 

 18.20 



.41 

 .40 

 .95 

 14 

 60 

 .12 

 00 

 00 

 09 

 34 

 27 

 16 

 96 

 96 

 14 

 70 

 74 

 60 

 80 

 70 

 20 



O 





3.03 22.00 



2. 



3. 



4. 



3. 



.24 

 85 

 05 

 04 



.38 

 79 



21.20 

 21.54 

 27.96 

 23.29 

 27.98 

 23.78 

 23.80 

 24.00 

 36.24 

 30.91 

 .35.76 

 45.14 

 45.14 

 40.26 

 23.44 

 56.78 

 33.40 

 35.40 

 34.70 

 30.68 



Organic Remains. The Hamilton period marked- a new era in the 

 history of the life of the "Wisconsin formations. While multitudes 

 of Protozoans, Eadiates, MoUusks and Articulates lived in the Sil- 

 urian seas, and left their remains embedded and embalmed in the 

 accumulating sediments, whether of sandstone, shale or limestone, no 

 fragment or trace of a Yertebrate has been found. The Hamilton 

 period witnessed the introduction of this highest type of the animal 

 kingdom into the Wisconsin series. In other portions of America, 

 the remains of Vertebrates appear somewhat earlier, in strata wanting 

 in our state, and, in the deposits of Europe, still earlier. The ver- 

 tebrate remains of this formation are confined to the relics of fishes, 

 and, unfortunately, these are fragmentary and imperfect. They have 

 been submitted to the inspection of Dr. J. S. Newberry, a most 

 eminent authority in this department of paleontology, who finds them 

 to be new and unknown species. They consist of "fragments of the 

 teeth of Chimferoids and a plate of a Placoderm. Only one specimen 

 is sufiiciently well preserved to justify description, and being thus 

 exceptional in character, may merit the partiality of delineation here. 

 The following is the description of Prof. N"ewberry: 



