STUDIES FOR STUDENTS 



429 



7. Appreciable part of material foreign to location in which deposit is 

 found (does not hold for all glacial deposits in high mountains) . 



8. Some of the stony matter striated. 



9. Lies on unweathered bed (in general). 



10. Sharp plane between drift and underlying formation. 



11. Beds striated, grooved, bruised, etc. 



12. Fossils, if any, show evidences of wear by transportation. 



This type of deposit is illustrated in Fig. 7. 



Fig. 7. — A section of glacial till in Wisconsin. 



CHARACTERS OF FLUVIO-GLACIAL DEPOSITS 



Corresponding v^ith the characters of the depositing agents, 

 fluvio-glacial deposits are closely aUied to fluvial deposits on the 

 one hand and to glacial till on the other; in general they resemble 

 the former in texture and the latter in lithologic constitution. In 

 shape the constituents of these deposits are a combination of form 

 due to glacial wear and that given to pieces rolled along the bottoms 

 of streams. The list follows: 



1. Heterogeneous in constitution. 



2. Moderate textural range. 



3. All material stratified. 



