2 20 INDEX. 



Little Lake 36 



Long Lake 47 



LiTTi.K Traverse Bay Hamilton Outcrops 54 



" Thunder Baj^ 49 



LiciiTiiousii Point, Presque Isle 51 



" " Point of Barques 73 



Macon Creek Quarries 26 



Manistee River 5 



Manitou Islands 13 



Marengo Artesian Boring 82 



Marshall Sandstone 82 



Marble Quarries, Crawford's , 50 



McGulpin's Point 23 



Middle Island 50 



Michigan City Artesian Well 37 



Mullett Lake 5.53 



Mottled Dolomites , 28 



Monroe Artesian Boring 30 



Muskegon River 5 



" Artesian Boring 84 



Mineral Spring, Alpena 39 



Napoleon Sandstone Quarries 79 



New River Salt Well 77 



Niles Artesian Well 93 



Norwood Rock Exposures 60 



Ontonagon Silver Ores 153 



Owosso Coal Mine 137 



" Artesian Boring g7, 137 



OOLITH 28 



^Ottawa Lake 35 



.Oriskany Sandstone 27 



Parma Carboniferous Limestone.. 114 



' ' Sandstone, Winchell '..,.., 128 



Partridge Point 41 



Petosky Limestone Bluffs 54 



Plum Creek Quarries 33 



Peat 15 



Point-aux-Paux 32 



' ' of Barques 70 



" " Lighthouse 73 



Point-aux-Grees 118 



Phelps's Lime-Kilns, Alpena 43 



Port Austin : 77 



Porter and Hubert's Mine 123 



.Portage River Limestone Quarries • 116 



Port Hope Salt Wells 76 



Presque Isle 51 



