224 



A section tnkon on a delta at the mill south of Dolan gave the fol- 

 lowing: 



1. Bedded, jointed yellow clay banded with red. burns red... 20 



2. Bedded, laminated, jointed bine clay, hard Avhen dry, soft 



. when wet 5 



.S. Very soft, massive, bhic clay, burning' white 20 



POST GLACIAL DEPOSITS. 



Under this head will lie considered the alluvium and Iho alluvial fan 

 deposits. 



ALLrVlX'M. 



At the close of glacial times Bean Blossom ("i-eelc and its tribu- 

 taries recut their channels to an unknown depth. Then a process of 

 meandering and slight aggrading set in. which has continued to the pres- 

 ent time. As a result the creek and its tributaries have developed large 

 alluvial ]»lains. The alluvial ])lain of Bean Blossom will average a mile 

 in width throughout INIonroe County, while many of its branches have 

 bottoms a (piarter to a half mile wide in their lower courses. The depth 

 of the alluvial deposits was not ascertained, but in lower Bean Blossom 

 Valley they are probably quite thick. The best farms of the region are 

 located on these plains. 



ALi.rviAT, Fans. 



A number of small V-shaped valleys with very steep channels were 

 found traversing the steepest, southern sloi)es of Bean Blossom Valley. 

 These on reaching the valley-floor spread out their debris in the form 

 of alluvial fans, their channels disappearing altogether where the fan 

 interc(>pts the valley floor. The fans pi-ojeet but a few yards beyond the 

 mouths of the valleys. These are evidently fans as they do not possess 

 the flat tops and steep outer margins of the deltas. That they are post- 

 glacial is evident from the fact that some of the little valleys have cut 

 their channels through glacial debris. The one just east of Andrew 

 Stine's house will serve as an examjile. In addition to this the fans are 

 built on the alluvial floor of the creek which has been made since glacial 

 times. 



