OTHER. RESOURCES OF MICHIGAN 103 



Saginaw counties, but these enterprises have now 

 been discontinued, so far as information now at 

 hand indicates. The sandstone of these formations 

 was likely to take on a yellowish hue because of 

 the oxidation of the iron carbonate in the cementing 

 material. The most important formations of work- 

 able sandstones were found in the northern peninsula 

 adjacent to Lake Superior at Marquette and on both 

 shores of Keweenaw Bay. During the last quarter 

 of the last century, a number of quarries were opened 

 in both areas and continued to produce large quanti- 

 ties of excellent building stone until the local supply 

 was exhausted or market conditions became unfav- 

 orable. The Marquette quarries, just south of the 

 city, yielded a brown sandstone that was very much 

 sought, the raindrop variety having a particularly 

 pleasing appearance. A hard attractive brown sand- 

 stone also was derived on the western shore-line of 

 Keweenaw Bay between L'Anse and Pequaming, 

 while on the opposite side of this waterway the fa- 

 mous Portage Entry redstone was taken out for 

 many years in very large quantities. Indeed this 

 formation was quarried until very recently, when 

 the cost of removing the over-burden, then become of 

 considerable deptli, and also apparently a change in 

 taste among the users of building stone, made quarry- 

 ing unprofitable. From these sandstones of Lake 

 Superior many well-known structures in many cities 

 of both the United States and Canada were erected, 

 the stone being transported great distances both l)y 

 rail and water. Its proximity to tlie shore of the 



