1916] FORSAITH—ALLOCTHONOUS PEAT 39 
necessary to form a definite opinion concerning the building up 
of such deposits. 
In the center of the lake (diagram, 22) a series of samples 
indicates a deposit 3 feet in depth, and tests in other parts show 
this to be a more or less uniform measure. In character the samples 
the cross-section of Lake Newnan shows the average depth of the allocthonous peat 
deposit in relation to the breadth and deepness of the lake. 
are very similar to those found in Lake Newnan. At the bottom 
there is a mixture of sand with the rusty brown fine material, with 
the usual absence of coarse fibrous matter, which generally occurs 
only near the shores. The upper portion differs from this only in a 
