326 E. M. KINDLE DEFORMATION IN NOVA SCOTIA AND ONTARIO 



in the case of the Paleozoic rocks cited above. Its solution should be 

 instructive in explaining such structures in older rocks and merits con- 

 sideration. 



Sediments of the Avon and other Eivers 



The great bulk of the sediments haiidled by tbe estuarine currents of 

 the Avon and other simihir Nova Scotia rivers consists of fine silt and 

 sand. Although roughly divisible into these two groups, silt and sand, 



y\/<3ter level 



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 th clajt 



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Figure 3. — Bottom Section and Profile of Missouri River at Blair, Nebraska 



Showing potential conditions for horizontal mud-flow. After Todd, Bulletin number 158, 



U. S. Geological Survey 



the estuarine sediments deposited by the currents furnish a considerable 

 variety of muds alone. This variety, as regards consistency or coherence, 

 which depend on water content and fineness of material, can be easily 

 demonstrated by a short walk across any Bay of Fundy mud-flat. On 

 parts of the flats the iDedestrian will sink .not deeper than his shoe tops ; 

 in others he will go in to the knees or hips, and a very moderate journey 

 will disclose still softer mud. It is evident that belts of the very soft 

 mud may be covered by areas of more coherent silt, and that sand deposits 

 several feet in thickness and very heavy may be laid down over some of 

 these very mobile sediments. If a heavy bed of sand were deposited over 



