14 COXTENTS 



PAGE 



Correlation of the Lower Devoxiax. By C. K. Swartz 96 



helderberg formation 96 



Introductory 96 



Faunal and Lithological Subdivisions 98 



Keyser Member 98 



Coeymans Member 102 



New Scotland Member 102 



Becraft Member 103 



Correlation with Formations of Other Regions 103 



Keyser Member 105 



Correlation with Pennsylvania 105 



Correlation with New Jersey 110 



Correlation with New York 114 



Helderberg Elements in the Fauna 118 



Coeymans Member , 120 



New Scotland Member 120 



Becraft Member 121 



ORISKANY FORMATION 121 



Shriver Chert Member 121 



Ridgely Sandstone Member 122 



GEOLOGICAL AND GEOGRAPHICAL DISTRIBUTION OF SPECIES 123 



Tables showing Distribution of Maryland Lower Devonian 



Species 124 



Local Sections. By C. K. Swartz, T. Poole Maynard, Charles 



schuchert, and r. b. rowe 133 



sections of helderberg formation 133 



Sections of Keyser Member 133 



Cumberland Area 133 



Section at Keyser, West Virginia 133 



Section at Dawson 136 



Section at Cookerly 138 



Section % mile southwest of Rawlings 140 



Section at Pinto 141 



Section at Millers Spring, West Virginia 143 



Section in Cash Valley 144 



Section at Devil's Backbone 147 



Section at Corriganville 151 



Sections at Hyndman, Pennsylvania 153 



Section at Market Street, Cumberland 155 



Section on National Road west of Flintstone 157 



Section at Flintstone 158 



Section 1% miles northeast of Flintstone 159 



Section li/i miles east of Rush 160 



Hancock Area 161 



Section at Tonoloway 161 



Section at Hancock. . ., 164 



Sections of Coeymans, Neio Scotland, and Becraft Members. . . 166 

 Section at Keyser, West Virginia 167 



