204 GEOLOGY OF EASTERN WISCONSIN. 



compact, but fractured, as shown. Just below this lies a softer and 

 more yielding shaly layer. At the left, where unprotected by the 

 layer above, it is sharply arched. Unfortunately, debris obscured the 

 section beyond this point. Enough, however, was removed to show 

 all the essential features. 



At Castlernan's quarry the loose pieces were tilted more irregularly, 

 but the surface of the rock is smoothed, and some obscure striae are 

 to be found whose direction is S. 45 to 50 "W. 



The combined import of these facts is, that the force producing the 

 phenomena acted from the northeast. This demonstration is the 

 more important since we have little other evidence of a decisive na- 

 ture relating to the direction of glacial movement in this region. But 

 such evidence as can be derived from the drift and topography cor- 

 roborates this conclusion. 



The combined testimony of these several witnesses establishes, be- 

 yond question, the remarkable character of the glacial movements 

 above indicated. The accompanying diagram (Plate YII) exhibits 

 these movements to the eye. The outlines of the main rivers, and 

 the principal bodies of water, are indicated by dotted lines. The rock 

 ledge that forms- the eastern margin of the Green Bay valley is indi- 

 cated by a line of small crosses. 



Fiords. In addition to what has been said, the peninsula lying 

 east of Green Bay, merits special consideration, by virtue of its pe- 

 culiar features. The Green Bay side of the peninsula is high, bold 

 and precipitous, while the Lake Michigan shore is low and incon- 

 spicuous. But while the two sides are in striking contrast in this re- 

 spect, they are conspicuously similar in the deep indentations that 

 characterize either side. And that which gives especial interest to 

 this is the correspondence that exists between them they are, in 

 pairs. At the extreme north is Hedge-hog Harbor, opposite which, 

 to the southeast, lies Big Sandy Bay, with a lake between them. A 

 little south lies Ellison's Bay, and over against it Rowley's Bay. A 

 few miles further south we find Sister Bay mated with North Bay. 

 At an equal distance farther south Eagle Harbor stretches far in 

 toward Douglas' and Bailey's Harbors. Again, Fish Creek and Kan- 

 garoo Lake form a pair, and Egg Harbor is linked across to White 

 Fish Bay by lakes and streains, while Sturgeon Bay well nigh severs 

 the peninsula, and Little Sturgeon Bay is wedded to the estuary-like 

 Ahnapee river. Nor is this a mere arbitrary or fanciful linking. By 

 consulting the topographical map accompanying this report, it will be 

 seen that deep valleys connect these indentations, and that a depres- 

 sion of less than 100 feet would reduce the peninsula to a linear 



