BULLETIN OF THE GEOLOGICAL SOCIETY OF AMERICA 

 Vol. 12, pp. 197-216 April 30, 1901 



WISCONSIN SHORE OF LAKE SUPERIOR 



« 



BY GEORGE LUCIUS COLLIE 



(Presented before the SocJetij December 29, 1900) 

 CONTENTS 



Page 



Intiodiictioii 198 



General j^eology of the region 198 



Relations of rocks and glacial material 198 



Lake Superior sandstone 199 



Equivalency and general character 199 



Cross-bedding ] 99 



Ripple-marks 200 



Mud-cracks 200 



Pebbly sandstone 200 



Thickness 200 



General topograpjiy of the region , 200 



Recent changes in lake level 203 



Shore formations 206 



Chequamegon bay and its history 206 



Oak Point bar 207 



Bad River bar 208 



Chequamegon Point bar 208 



Lagoon and marsh deposits 210 



Island spits 211 



Tombolos 212 



Beaches 212 



The various types 212 



Platform beach 212 



Barrier beach ,...,. 213 



Cliff beach 213 



Storm beach 213 



Shoals 213 



Wave erosion and its topography 214 



Caverns 214 



Coves 215 



Cliffs 215 



Benches 215 



Stacks V 216 



Summary 216 



XXIX— Bur,!,. Geoi,. Soc. Am., Vor. 12, 1900 (197) 



