540 PKOCEEDINGS OP THE ALBUQUERQUE MEETING 



cherty and ferruginous rocks resembling tbose found in tlie iron ranges of lake 

 Superior" in the conglomerate of eastern Ontario are found by the writers to 

 have been derived from layers or bands of this material in the Grenville lime- 

 stone. 



The paper was read by Mr. Miller and the discussion was participated 

 in by A. P. Coleman, H. P. Gushing, C. K. Van Hise, A. C. Lane, and 

 W. G. Miller. 



The next paper was 



RELATION OF THE EQVVS BEDS OP KANSAS TO REVERSED MISSISSIPPI 



DRAINAGE 



BY W. G. TIGHT 



The paper was discussed by A. P. Coleman, H. E. Gregory, A. C. 

 Lane, and P. W. Cragin. 



The following two papers were read without intermission by Dr. A. C, 

 Lane: 



NEW UPPER 8ILVRIC FAUNA FROM SOUTHERN MICHIGAN^ 

 BY W. H. SHEEZER AND A. W. GKABAU 



Contents 



I'age 



Introductory 5-10 



Monroe formation 541 



Salt shaft exposure and section 541 



Anderdon exposure 542 



Sibley core and other exposures of Anderdon 542 



Correlation of the beds ' 543 



Possible economic value , . . 544 



Proof of the Lower Devonic hiatus 544 



Synopsis of the faunas of the Monroe beds of Michigan, Ontario, Ohio, and western 



New York 545 



The Lower Monroe faunas 545 



In general 545 



A. Fauna of the Greenfield dolomite 545 



B. Fauna of the Put-in-bay dolomites 546 



C. Fauna of the Raisin River beds 546 



The Upper Monroe series 546 



D. Fauna of the Flat Rock dolomite of the salt shaft 546 



E. Fauna of the Anderdon bed of the salt shaft and the Anderdon quarry. 547 



F. Fauna of the Amherstburg bed 547 



G. Fauna of the Lucas dolomite 549 



Discussion of the faunal differences 551 



Inteoductoey 



This fauna raises the question whether the beds from the Sylvania to the 

 Dundee should be regarded as Silurian with precisive Devonic forms or "colo- 

 nies," or whether the Sylvania should be regarded as Oriskany, and the 



^ By permission of the state geologist of Michigan. 



