DISTRIBUTION OF THE BOWLDERY DRIFT 



Localitii. 



Waveiiy, southwest of town, Lafayette count}' 



Salt Springs, northwest of raUroad bridge, Saline county . . 



Marshall, east of junction, top of till. Saline county 



North of Black water. Cooper county 



Billingsville, Cooper county 



East of Rocheport, Boone county 



Bluffs thirteen miles south of Columbia, near mouth of 



Bon Fennne, Boone county 



Hibernia and two miles south, Callaway county 



North of Saint Aubert, at various levels up to five miles 



north of Saint Aubert, Callaway countj^ ; 



Five miles northwest of Portland, Callaway county 



Danville, Montgomery county 



Four miles south of New Florence, Callaway county 



Two-thirds of a mi'le south of Warrenton, Warren county. 

 Tuque, seven miles south of Wright City, AVarren county. 

 New Melle, seven miles south of Wentzville, Saint Charles 



county, about ^ . . 



Gilmore, Saint Cliarles county 



Near Troy, west of Cuivre river, Lincoln county, about . 



Two miles east of Briscoe, Lincoln county 



Three miles east of Silex (Auburn), Lincoln county. . . . 



Cyrene, Pike county 



Bowling Green, Pike county 



Three miles east of McCune's, Pike county 



Near Hannibal 



Palmyra 



DRIFT. 



535 



Altihide above 

 Missouri 



Altitude above 

 the sea. 



80 



730* 





730* 





730* 





820 





700* 



200 



770* 



300 



850 



330 



860 



300 



830 





840 





830 





850 





850 





875 





800 





600 





675 





800 





825 





845 





880 





825 





675 





650 



THE LOESS OR LOAMY CLA Y. 



lU Character. — Of this we need say but little. Its typical development 

 has been often described and is most marked in the vicinity of the larger 

 streams. Tlie fact that it chancres its character has not been so com- 

 monly recognized. Professor Salisbury, in his report on Crowley ridge, 

 Arkansas, has called attention f to the fact that it becomes more clayey 

 away from the principal streams, and it should also be added that its 

 composition varies according to the formations around it. Its clayey 

 form is sometimes of a reddish cast, as, for instance, in the ridges in the 

 western part of the state, but more frequently, in central and eastern 



*Tliose marked with a star are in an old channel of the Missouri. 



Professor Broadliead, on page 22 of the Missouri Geological Report for 1873-"74, reports the find- 

 ing of " quartzite and greenstone " pebbles in a heavy deposit of gravel " in Saint Louis county, 

 three miles north of Glencoe." He kindly directed me to the place, and after spending several 

 hours examining the deposit and its surroundings I concluded that I could find nothing of 

 northern or crystalline origin. Moreover, examination of several favoraVjIe exposures in the 

 eastern part of the county confirmed me in my conclusion that the region is truly driftless. The 

 gravel appears to be of older origin than the Quaternary. 



Professor Meek reports that a granite bowlder eighteen inches in diameter was found in the south- 

 ern part of Morgan county, which is certainly a puzzle. Missouri Geol. Report, 1855-'71, p. 139. 



t Arkansas Geol. Rep., vol. ii, 1889, p. 226. 



