THE NEBRASKAN ICE INVASION 233 



Broadhead gives the following section from a well located five miles southwest 

 of Gallatin, Daviess County, near Honey Creek: 58 



1. Soil 1 foot 



2. Yellow clay 3 feet 



3. White stratum 4 " 



4. Joint clay with pebbles and boulders 12 " 



5. Blue clay 20 " 



6. Hard red sand IV2 " 



7. Yellow sand 7 " 



8. Blue sand with sticks and leaves 3 " 



9. Clay shales 3 " 



In No. 5 of the above section, at a depth of 35 feet below the surface, an 

 elm stick and a grapevine were seen. No. 5 is Kansan and the underlying 

 deposits are certainly Aftonian. Several nearby wells (sections 27, 28, 29, 

 and 33) contained wood, one at 40 feet (walnut) and another (pine) at 70 feet. 



South of the Missouri River, in the counties bordering the Missouri-Kansas 

 state line, a few records appear referable to the Aftonian stage. Four miles 

 north of Pleasant Hill, Cass County, 59 the skull of a bison (Bison latifrons) 

 was found in gravel with decomposing fresh water shells, at a depth of 12 feet, 

 under soil and dark clay. In Bates County, 60 a well at Papinville gave the 

 subjoined section: 



Yellowish clay 30 feet 10 inches 



Bluish clay _ " 4 " 



Thin sand stratum with tooth of horse " x " 



Gravel bed 5 " 



The bones and tusks of a mastodon are reported from the banks of the 

 Marias de Cygnes, embedded in similar deposits. 61 In Vernon County, near 

 Nevada, 62 a gravel bed occurred in a well boring, 16 feet below the surface, 

 which contained a walnut log. Four miles north of this well, charred wood 

 and bivalve shells were found at a depth of 19 feet. 63 In Benton County, 64 

 Platygomis compressus ( = Dwotyles costatus) has been found associated with 

 mastodon remains. Calvin 65 records several species of mammals from Aftonian 

 deposits near Rockport, Atchison County, in the Whitman gravel pit, sect. 22, 

 T. 64, N, R. 41 W. 



58 Geol. Missouri, 1873-74, pp. 313-314. 



"Broadhead, Amer. Nat., IV, pp. 61- 62. 



'"Op.cit., pp. 60-61. 



61 Broadhead, Geol. Missouri, 1873-74, p. 157. 



« 2 Broadhead, Geol. Missouri, 1873-74, p. 121. 



a Amer. Nat., IV, pp. 61-62. 



"LeConte, Proc. Phil. Acad., 1852, pp. 5-6. 



95 Bull. Geol. Soc. Amer., XXII, pp. 211-212. 



