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The file has been proofread to correct errors resulting from the scanning process. Obvious spelling and punctuation errors in the original publication have also been corrected. Cover Kakabeka Falls on the Kaministiquia River. The waterfall occurs where the escarpment is made up of soft shales overlain by a capping, 2 feet thick, of harder chert-carbonate rock. ONTARIO DEPARTMENT OF MINES HON. ALLAN F. LAWRENCE. Minister of Mines D. P. Douglass, Deputy Minister J. E. Thomson, Director. Geological Branch GEOLOGY AND SCENERY RAINY LAKE AND EAST TO LAKE SUPERIOR by E. G. Pye Geological Guidebook No. 1 ONTARIO DEPARTMENT OF MINES (iii) First printing 1968 Reprinted 1977 on 701b sterling matte Designed and produced by staff of the Ontario Department of Mines./ Author: Dr. E. G. Py e./Photographs and illustrations not otherwise credited: Dr. E.G. Pye./Layout, typography and general production: David Jupe./Illustration graphics: Carl Cashin./Editing: William Treadwell./Set in Baskerville with Optima headings and Goudy italic captions./Lithographed in Ontario on Georgian offset. Parts of this publication may be quoted if credit is given to the Ontario Department of Mines. It is recommended that reference to this report be made in the following form: Pye, E.G. 1968: Geology and Scenery, Rainy Lake and East to Lake Superior; Ontario Dept. Mines, Geol. Guidebook 1, 114p. (reprinted 1977). Copyright August, 1968 PREFACE In recent years, rock and mineral collecting has aroused the interest of hobbyists in all parts of Canada and the United States. At the same time, many people have become increasingly aware of our scenic attractions, and their attention has been directed to the part geology has played in the development of the landscape. Others have recognized the impact of the mining industry on our national economy, and have requested geological information to help them understand better the nature of our mineral re- sources. The Ontario Department of Mines has undertaken the publication of geological guidebooks to various areas of the prov- ince, in the hope that these guidebooks will help to satisfy the needs of amateur geologists and, at the same time, stimulate similar interests amongst the public generally. This guidebook is the second of the series. It was prepared at the request of the Atikokan Chamber of Commerce, following the completion of Highway 11 between the Canadian Lakehead and Fort Frances. The first part of the guidebook is a resumé of the general geology of the region and is intended to provide general infor- mation concerning the relationships between the principal groups of rocks, and to give the reader a simplified account of the geo- logical history. While written primarily for the novice, it is never- theless presumed that the reader has some knowledge of rocks and minerals. In case of difficulty, however, there are many ex- cellent textbooks on elementary geology and mineralogy avail- able in most libraries and book stores. The second part of the guidebook lists various points of geo- logical interest along or close to the principal highways in the region. The locations and means of access are indicated, and des- criptions and explanations of the salient features are given. Although only easily-reached sites, with safe parking facilities nearby, have been included, the reader is advised to use every precaution against possible traffic hazards. Completing the guidebook are: (1) an appendix for amateur mineralogists, lapidaries, and collectors, giving information on localities where specimens may be obtained, lapidary clubs and shops, and public displays of rocks, minerals and ores; and (2) a brief and simplified glossary of the technical terms used in this book. ACKNOWLEDGMENTS During the course of the field work, the author received much valuable assistance from the officials of the various operating mines in the district. He is also indebted to: (1) the geological staff, Caland Ore Company Limited, for the report on the company’s operations near Atikokan; (2) H.L. Bell, Mining Recorder, Ont. Dept. Mines, Fort Frances, for the account of the colourful history of the Mine Centre area; and (3) W. J. Ransom, Public Relations Officer, Ontario Hydro, for much valuable in- formation on the Silver Falls Generating Station near Port Arthur. The author is particularly grateful to M. Hupchuk and J. Hodg- kinson for their kind assistance in the selection and examination of points of scenic and geological interest near Fort Frances and Shebandowan, respectively. Mr. J. Baillie, of the Geological Branch, Ont. Dept. Mines, assisted in the preparation of the maps and diagrams accompanying this report and provided much of the information given in the list of “Localities for Collectors” in the appendix. REFERENCES In the preparation of the guidebook, considerable use was made of the extensive literature available on the geology of the region. For those who wish to go beyond the scope of this publication, the reports and maps considered to be most pertinent are included in the following list of references. Publications of the Geological Survey of Canada are obtainable through the Office of the Queen’s Printer, Ottawa, Ont.; those of the Ontario Department of Mines, through the Publications Office, Department of Mines, Queen’s Park, Toronto 2, Ont. Publications marked with an asterisk (*) are out of print and are available only in libraries. Bartley, M.W. 1939: Iron deposits of the Steeprock Lake area; Ont. Dept. Mines, Vol. XLVIII, pt. 2, pp. 35-47. Bertrand, J.P. 1959: Highway of Destiny; Vantage Press, N.Y. Giblin, P.E. 1964: Burchell Lake area; Ont. Dept. Mines, Geol. Rept. No. 19. Goldich, S.S., Nier, A.O., Baadsgaard, H., Hoffman, J.H., and Kruegar, H.W. 1961 : The Precambrian geology and geochronology of Minnesota; Geol. Surv. Minnesota, Univ. Minnesota, Minneapolis. Goodwin, A.M. 1960: Gunflint iron formation of the Whitefish Lake area, District of Thunder Bay; Ont. Dept. Mines, Vol. LXIX, pt. 7, pp. 41-67. Hawley, J.E. *1929: Geology of the Sapawe Lake area, with notes on some iron and gold deposits of Rainy River District; Ont.