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APPENDIX 
TO A REPORT ON THE GRAND TRAVERSE REGION. 
By A. WINCHELL. 
Paleontological investigations made since the printing of 
the body of this Report, enable me to present a more satisfac¬ 
tory account of the Hamilton group of Little Traverse bay 
than has hitherto been done. This region possesses consid¬ 
erable geological interest, in consequence of being removed at 
least 250 miles in a straight line from the nearest Hamilton 
rocks, (at Widder, C. W.,) which have heretofore received the 
attention of paleontologists. 
To co-ordinate the various outcrops along the shore of the 
bay and lake, as far as the black shale beds, is a problem of no 
little difficulty, since the shore-line runs nearly in the strike of 
the strata, and the latter present numerous irregular undula¬ 
tions, and undergo, moreover, considerable lithological changes 
in short distances. By fixing upon certain obvious paleonto¬ 
logical horizons, however, and parallelizing strata which are 
obviously synchronous, all the various localities and strata fall 
by degrees into their proper places. 
7 
