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Allegheny river analysis anticlinal Armstrong county axis Beaver Bend anticlinal Brookville Brookville coal Callensburg Catfish Clarion coal Clarion county Clarion group Clarion Lower coal Clarion river Clarion township coal bank coal bed coal measures coke cold-blast charcoal furnace Conglomerate measures Conglomerate series east Edenburg farm Farmington township feet beneath feet bosh feet thick Ferriferous limestone fifty feet Fireclay floor Fixed carbon Forest county four feet Freeport Lower coal Freeport Upper coal grey hard hill Homewood sandstone horizon inches iron Kittanning Lower coal Kittanning Middle coal Kittanning Upper coal Lawsonham lies lime Limestone township McCreath Mercer micaceous mile mined nearly outcrop Piney Porter township pyrites quarry railroad Red Bank Red Bank creek Red rock sandy shale Shale roof shells Shippenville shown by Fig shows Slate slaty Sligo soft stream Sulphur summits synclinal thin three feet Toby Venango county Volatile matter water level West Freedom
Page viii - WG PLATT — Geologist in charge of the Survey of Armstrong and Jefferson counties. RH SANDERS — Topographical Assistant in Dauphin, Lebanon and Berks counties.
Page vii - ARIO PARDEE, ---------- Hazleton. WILLIAM A. INGHAM, ------- Philadelphia. HENRY S. ECKERT, -------- Reading. HENRY MCCORMICK, -------- Harrisburg. JAMES MACFARLANE, -------- Towanda. JOHN B. PEARSE, - - - - Philadelphia. JOSEPH WILLCOX, -------- Philadelphia. Hon. DANIEL J. MORRELL, ------ Johnstown. HENRY W. OLIVER, - - - Pittsburgh. SAMUEL Q. BROWN, - - Pleasantville. SECRETARY OF THE BOARD. WILLIAM A. INGIIAM, Philadelphia. STATE GEOLOGIST. PETER LESLEY, Philadelphia. 188O. ASSISTANT GEOLOGISTS....