QUATERNARY AGE. 



267 



Lower Loup; No. 4 from Sutton, and No. 5 from the Republican 

 Valley, near Orleans, in Harlan County: 



I NO. 1. I NO. 2. NO. 3. NO. 4. NO. 5. 



Insoluble (silicious) matter. 



Ferric oxide 



Alumina 



Lime, carbon.ite 



Lime, phosphate 



Magnesia, carbonate 



Pomssa 



Soda 



Organic matter 



Moisture 



Loss in analysis 



81.32 



81.35 



3.87 



3.83 



.75 



.74 



6.06 



6.03 



3 59 



3.58 



1.28 



1.31 



.29 



.35 



.16 



.14 



1.06 



1.05 



1.08 



1.09 



.54 



.53 



81.28 

 3.86 



.75 

 606 

 3.59 

 1.28 



.2 7 



.15 

 1.07 

 1.09 



.59 _ 

 100.00 100 00 100.00" 100.00 100. 00" 



81.30 

 3.85 



.73 

 6.05 

 3.57 

 1.31 



.34 



.16 

 1.06 

 1.08 



.55 



81.32 

 3.86 



.74 

 6.09 

 3.59 

 1.29 



.33 



.16 

 1.06 

 1.09 



.47 



After making the above analyses I received from Dr. Hayden 

 his Final Report on the Geology of Nebraska. This report, on 

 page 12, contains two analyses of the Loess deposit from Hannibal, 

 Mo., made by Dr. Litton. According to these analyses, from one 

 hundred parts there were — 



No. 1 



No. 2. 



Silica ; 76.98 



Alumina and peroxide of iron 11 . 54 



Lime ! 3.87 



Magnesia 1 . 68 



Carbonic acid Not determined 



Water 2.01 



77.02 

 12.10 

 3.25 

 1.63 

 2.83 

 2.43 



96.17i 



99.26 



According to these analyses the Loess contains more clay in Mis- 

 souri than it does in Nebraska. The analyses that I made of two 

 specimens of Loess from Richardson County also contained slight- 

 ly more alumina than the above. 



For the purpose of comparison, I here reproduce, from Hayden's 

 report, BischofF's analyses of the Lacustrine or Loess of the Rhine: 



NO. OF ANALYSIS. 





1. 



2. 



3. 



4. 



5. 



Silicic acid ' 



58.97 

 9.97 

 4.25 

 002 

 0.04 

 0.11 

 0.84 



20.16 



79.53 

 1345? 

 4 81$ 

 02 

 006 

 1.05? 

 1.14 S 



78.61 

 15.26 



0.09 

 3.31 



62 . 43 



7.51 

 5.14 



0.21 



1.75 



1 1 . 63 

 3.02 

 2.31 



81.04 



Alumina 



.75 



Peroxide of iron 



.67 



Lime 





Magnesia 



0.27 



Potash 





Soda 



2.27 



Carbonate of lime 





Carbonate of magnesia 



4.21 

 1.37 









Loss by ignition 







1.89 









