CONTENTS. XI 



Page 



Upper Sewickley Sandstone 120-121 



Sewickley Coal 121-122 



Lower Sewickley Sandstone 123 



Sewickley Limestone 123 



Cedarville Sandstone 124 



Redstone Coal 124 



Weston Sandstone 124-126 



Redstone Limestone 126-128 



Weston Shale 128-129 



Pittsburgh Coal 129-130 



Chapter VII. Stratigraphy The Conemaugh Series 131-159 



General Description and Section 131-132 



Local Sections 133-134 



Description of Formations 134-159 



Lower Pittsburgh Sandstone 134-135 



Upper Pittsburgh Limestone 136 



Little Pittsburgh Coal 136-137 



Connellsville Sandstone 137-138 



Little Clarksburg Coal 138-139 



Clarksburg Fire Clay Shale 139-140 



Lower Connellsville Sandstone.. 140-142 



Normantown Coal : 143-144 



Clarksburg Red Shale 144 



Morgantown Sandstone 145-147 



Orlando Limestone 147 



Elk Lick Coal 148 



Elk Lick Limestone 148 



Birmingham Shale 149 



Graf ton Sandstone 149-150 



Ames Limestone and Shale 150-151 



Harlem Coal 151-152 



Pittsburgh Red Shale 152-153 



Jane Lew Sandstone 153-154 



Saltsburg Sandstone k 155 



Bakerstown Coal 155 



Pine Creek Limestone 156 



Buffalo Sandstone 156-157 



Brush Creek Limestone and Shale 157-158 



Brush Creek Coal 158 



Mahoning Sandstones 158-159 



Uffington Shale 159 



Chapter VIII. Stratigraphy The Allegheny Series 160-164 



General Description and Section 160-161 



Description of Formations 161-164 



Upper Freeport Coal 161 



Upper Freeport Limestone 161 



Upper Freeport Sandstone 162 



Lower Freeport Coal 162 



Lower Freeport Sandstones 162-163 



Upper Kittanning Coal 163-164 



Lower Kittanning Coal 164 



Clarion Sandstone 164 



Chapter IX. Stratigraphy The Pottsville Series 165-173 



General Description and Section 165-168 



