206 



NARRATIVE OF THE EXPEDITION. 



which we had observed at Sturgeon Bay and the contiguous west 

 shore of Lake Michigan. The line of lake coast included in this 

 remark is three hundred and twenty miles; during all which dis- 

 tance the coast seems, but only seems, to be the sport of the fierce 

 gales and storms, for there is reason to believe that the forma- 

 tions of drift clay, sand, and gravel rest, at various depths, on a 

 stratification of solid, permanent rock. To us, however, it proved 

 a barren field for the collection of both geological and mineralo- 

 gical specimens. There were gleaned some rolled specimens of 

 organic remains, of no further use than to denote the occurrence 

 of these in some part of a vast basin. There was a specimen of 

 gypsum from Grand Eiver. The few patches of iron sand I had 

 noticed, were hardly worthy of record after the heavy beds of 

 this mineral which we had passed in Lake Superior. The same 

 remark may be made of the few rolled fragments of calcedonies, 

 and other varieties of the quartz family, gleaned up along its 

 shores, for neither of these constitute a reliable locality. 



Of the florte and fauna we had been observant, but the sandy 

 character of the mere coast line greatly narrowed the former, in 

 which Captain Douglass found but little to preserve, beyond the 



Petrified leaf of the Fa>jus Ferrugima. 



