SECOND GEOLOGICAL SURVEY OF. PENNSYLVANIA 1876-7. REPORT OF PECKJEESS. II. OIL WELL RECORDS AND LEVELS. BY JOHN F, CARLL PUBLISHED IN ADVANCE OP EEPORT OF PROGRESS ILL 1 HAKRISBTJKG- PUBLISHED BY TH BOARD of FOR TUX 8100ITD GXOLOGIC1L ITTlTlT. Batered, for the Commonwealth of Pennsylvania, In the year 1877, according to acta of Congress, BY JOHN B. PEAKSE, Secretary of the Board of Commissioners of Geological Survey. In the Offico of the Librarian of Congress, at WASHINGTON, D. C. Printed by B, r, METERS, State Printer, HAUBISBDRG, PA, BOARD OF COMMISSIONERS. His Excellency, JOHN F. EARTRAMT, Governor, andac-eitflcfo President of the Board, Harrislmrg. ARIO PARDEE, Hazleton. WILLIAM A. INGHAM, - Philadelphia. HENRY S. ECKERT, Reading. HENRY MCORMICK, . . . Harrisburg, JAMES MACFARLANE, Towanda. JOHN B. PEARSE, Philadelphia. ROBERT V, WILSON, M, D., - - - Clearfield. JSon. DANIEL J. MORRELL, ... Johnstown HENRY V. OLIVER, Pittsburg. SAMUEL Q. BROWN, Pleasantvilk SECRETARY OF THE BOARD JOHN B. PEARSE, Philadelphia. STATE GEOLOGIST JPim LESLEY, Philadelphia. ASSISTANT GEOLOGISTS. PERSIFOR FRAZEB, JR. Geologist in charge of the Surrey of York, Adams, Franklin and Cumberland. A. E. 3JEHMAN Topographical Assistant. FREDEEICK PBIME, JE. Geologist in charge of the Survey of Lehigh, Northampton, Berks and Lebanon. A. P. BEBMN Topographical Assistant. JOH-N H. DEWEES Geologist in charge of the Survey of the Fossil Ore belts of the Juniata country. FBANKLIN PLATTGeologist in charge of the Survey of Clearfield, Jeffer son, Cambria, Somerset, Armstrong, Blair, a, fcc. W. G. PLATT Geological Assistant in Cambria, Somerset, and Indiana. K. H. SANDERS Topographical Assistant in Blair, and Somerset, J.T. STEVENSON Geologist in charge of the Survey of Greene, Washing ton, Fayette and Westmoreland. I. C. WHITE In charge of the Survey of Beaver, Lawrence, Mercer, fcc. JT. F. CARLL Geologist in charge of the Survey of the Oil Eegions. H. M. CHANCE Geological Assistant for the Survey of the Water Gaps, and in Bufcler, Beaver, Mercer, fcc., o. C. A. AsHBTrRNERGeologieal Assistant in MiflGlin and Blair, and in charge of the Survey of MKean, Elk, Forest, c. C. J3. BILMN Topographical Assistant in Mifflin and Blair, and in charge of the Survey of the Huntingdon Valley and Seven Mountains. ANDBEW SHERWOOD Geologist in charge of the Survey of Bradford, Tioga f Potter, I ycorning, Ac. F. A., GENTK Chemist and Mineralogist at Philadelphia. A. S. MCBEATH Chemist, in charge of the Laboratory of the Survey, 22 Market street, Harrisburg. C. B. HALL, Fossil Zoologist, in charge of the Collections for the Museum. LEO LESQUEEEUX Fossil Botanist, Columbus, Ohio. E. B. HA. BDEN In charge of Illustrations for the Kepprts, 1008 Clinton. street, Philadelphia. CBCAKLES ALLEN In charge of the Collection of Kecords of Kailroad and other Levels, Harrisburg. F. W. FOEMAIT Clerk in charge of the Distribution, of Keportfc firom thfr rooms of the . Board, 223 Market street, PREFACE TO I. I. The volume of Oil Well Records now published as prepared by Mr. John F. Carll, assistant in charge of the survey of the Oil Region of Pennsylvania, is unique of its kind, and will doubtless be considered an important contribution to geology, not only the geology of Pennsylvania, but of the world. For the first time geologists are now put in possession of a large collection of authentic, well considered and classified mass offacts, made up with great pains and carefulness, in the face of many difficulties, with the help of oil well owners and opera tors, not only during the progress of the survey, which com menced in 1874, but during ten years of a previous residence in Venango county...