A ,GUIDEB:OOKTO MINNESOTA TRUNK HIGHWAY,NO.·F
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.......' (. ,',' f' -1' •••• , .. '.' /,' 1-,', ,i:~ .' " " ,:, • .:. '. f ,'.~' .}I ~. t '-' ,', ...., ',. • t. ~. ".' }'. .~~. , " I , ,- ~ ..". :MINNESOTA GEOLOG;ItAL SURVEY,' ~..... ,"\" - ~," EMM;ON:S, ,DIRECTOK- " .. J WIL~IAM H. , , , ~.' ,BULLETnfNO.20, '. ,. ".): " . " A ,GUIDEB:OOKTO MINNESOTA TRUNK HIGHWAY,NO.·f "'j', BY " , . , G. M.SCHWARTZ :\,::j,." ~? .. r l' i ! '-";, " I'" , I;':: ' '\ ' .(' . , " 4,.'•• -'.' .. ;.- "I: MINNEAPOLIS' . The Univetsity, of MUj,nesota " I~~S," "\' , . '.\,' I" l' , . -,' ... FRONTISPIECE. FALLS OF THE MANITOU RIVER m4t llluiutr.aity of ~iuut.anta MINNESOTA GEOLOGICAL SURVEY WILLIAM H. EMMONS, DIRECTOR BULLETIN NO. 20 A GUIDEBOOK TO MINNESOTA TRUNK HIGHWAY NO.1 BY G. M. SCHWARTZ MINNEAPOLIS The University of :Minnesota PREFACE This paper is a description of the chief geologic features that may be seen along Highway No. I of Minnesota. This highway begins at the Iowa state line south of Albert Lea, and passes northward through the Twin Cities to Duluth and thence extends along the north shore of Lake Superior to the Pigeon River near Port Arthur, Ontario. The re pott includes thirteen maps which show the locations of roads, towns, and villages, and most of the rocks and land forms that are described in the text. Essentially all places mentioned in the text ale located on one of the maps. The work was in charge of Dr. G. M. Schwartz who traversed the entire route and prepared the text. Numerous earlier re ports by the Geological Survey of Minnesota and the United States Geological Survey were d'rawn upon for data and these are appropriately acknowledged in the text. A section on trees and plants is supplied by Dr. C. O. Rosendahl and Dr. F. K. Butters, of the University. of Minne- sota, and one on fish and game by Mr. Thaddeus Surber. The paper is intended for the use of the traveler and the general public and as far as practicable highly technical terms are avoided. This survey has issued a number of other publications treating the geology, surface formations and agricultural conditions, iron ores, man ganiferous ores, clays, building stones, peat, etc. These are sold by the librarian of the UniVel"sity of Minnesota at nominal prices. A list of publications of the survey may be had free on application to the librarian of the University or the director of the State Geological Survey. VhLLIAM H. EMMONS Additional copies of this publication may be obtained from the Librarian, U.niversity of Minnesota, Minneapolis, Minnesota. CONTENTS Page Preface ................................................. V Chapter I. Introduction .................................. 1-3 Field work and acknowledgments ........................ I Chapter II. General conditions in, and geology of, Minnesota .. 4-21 Nalne ............................................... 4 Notes on the history of the state ........................ 4 Climate of Minnesota .................................. 5 Topography ......................................... 6 Gene'ral statement ................................. 6 Altitude ......................................... 6 Relief .......................................... 7 Drainage ....................................... 7 Lakes l ..••.••••...•....•...••••.......•.• · •.•.•• 7 General geology of the region .......................... 8 General statement ................................. 8 Huronian: slates, erosion, sedimentation, and metamor- phism ....................................... 12 Keweenawan rocks, lavas, and igneous processes ...... 13 Cambrian and Ordovician sedimentary rocks .......... 15 Geologic periods not represented in Minnesota .... 18 The Great Ice Age-glaciation ...................... 18 Chapter III. Highway No. I hom the south state line to the Twin Cities .......................................... Chapter IV. The Twin City region ........................ Geology and physiography along the Mississippi River in the Twin Cities ................................• 36 Chapter V. Highway No. I hom the Twin Cities to Duluth .... 43-61 Side trip to Taylors Falls and the "Dalles of the St. Croix" .. 45 Jay Cooke State Park ................................. 58 Chapter VI. The Duluth region ........................... 62-68 Chapter VII. Highway No. I along the north shore of Lake Superior ........................................ Side trip on the Gunflint Trail .......................... Old Highway No. I, or the inland route ................. " Chapter VIII. Fish and game along Highway No. 1. By Thad- deus Surber .......................................... 92 -103 Chapter IX. Trees and plants along Highway No. 1. By C. O. Rosendahl and Frederic K. Butters ...................... Glossary of geologic terms. .. 119-24 Index. .. 125-28 ILLUSTRATIONS PLATES Page Frontispiece. Falls of the Manitou River. 11 Plate I. Common types of fossils found in Oi'dovician rocks in Minnesota ................................. r7 II. A. Exposure of glacial drift ina pit on Highway No. 46, Taylors Falls B. The Dalles of St. Croix, Interstate Park, Taylors Falls 46 III. A. Bluff of St. Peter sandstone on the Straight River, Faribault B. Gorge of the St. Louis River between Carlton and Thomson C. Beds of Carlton slate dipping to the south. .. 60 IV. A. Double falls of the Gooseberry River, 300 feet below Highway No. r B. Valley of the Baptism River C. Falls of the Baptism Rivel', r)/~ miles above Highway No. r .... ·.................................. 77 V. A. The Little Palisades, coast of Lake Superior east of the mouth of the Baptism River B. Group of white pine (Pinus strobus). Superior Na tional Forest C. Forest of spruce and balsam, Stewart River, Highway No. I, near Two Harbors. .. 79 VI. A. Columnar jointing in diabase. Harbo'r at Grand Marais B. Abandoned shore line of Lake Superior, Cook County 83 VII. A. Pot Hole Falls, Brule River, r0 miles above High- way No. r B. Hairpin turn in Split Rock Canyon of the Pigeon River ..................................... 85 VIII. Common game fishes of Minnesota. .. 95 IX. Common game fishes of Minnesota. .. 97 X. Leaves of common Minnesota trees. .. I I I XI. Leaves of common Minnesota trees. .. 113 TEXT FIGURES Fig. 1. Key map showing the route of Highway No. I and the area covered by each route map. 2 2. Generalized geologic map of Minnesota................. 9 3. Sketch map showing portions of glacial lakes Agassiz and Duluth ......................................... 19 CONTENTS ix Page 4. Sketch map showing the relation of Lake Duluth to Lake Superior ........................................ 20 5. Cross section along the Mississippi River near St. Anthony Falls ........................................... 39 6. Sketch map showing the relation of Minnehaha Falls to the present Mississippi River and an abandoned channel and falls of an earlier stage of the Mississippi. .. 40 7. Sketch map of the Taylors Falls region. .. 47 8. Sketch map of Jay Cooke State Park and adjacent areas along the St. Louis River.............. .. 59 9. Cross section of outcrop showing three lava flows. Second Street between Fourth and Fifth Avenues East, Duluth 67 10. Pigeon Falls......................................... 102 I I. Map of Minnesota showing distributiop of forest and prairie 107 ROUTE MAPS Route Map No. I. Highway No. I through Freeborn and Steele counties.. 23 2. Highway No. I through Rice and Dakota counties. .... 28 3. The Twin City region ....................... follows 34 4. Highway No. I from St. Paul through Chisago County 44 5. Highway No. I through Pine County.. .. 53 6. Highway No. I through Carlton County. .. 57 7. The Duluth region .......................... follows 62 8. Highway No. I along the north shore of Lake Superior near Two Harbors ...................... follows 70 9. Highway No. I along the north shore of Lake Superior near Beaver Bay ........................ follows 72 10. Highway No. I along the north shore of Lake Superior near Little Marais and Tofte ............. follows 78 I I. Highway No. I along the north shore of Lake Superior near Lutsen and Grand Marais ............ follows 80 12. Highway No. I along the north shore of Lake Superior neat Grand Portage ..................... follows 84 13. North end of the Gunflint Trail. .............. follows 88 CHAPTER I INTRODUCTION Few states show a greater variety in natural features than Minnesota. The southwestern portion presents large expanses of almost unbroken fertile prairie; the southeast a much dissected area typical of regions farther south where the glacier has not leveled off the topography re sulting from stream erosion. A typical glacial moraine topography char acterizes the region around Minneapolis and St. Paul. The northern part of the state presents a much more rugged country famous for its iron mines, and of interest to the tourist because of the great areas of wild and wooded country and its lakes, so numerous that it has been well named, the "Land of Ten Thousand Lakes." The lakes, forest, and delightful summer climate have combined to make the state the goal of thousands of tou'rists from nearly every state in the Union.- Highway No. 1 is well located to give the traveler a comprehensive view of the various types of Minnesota country. The highway begins at the Iowa state line south of Albert Lea, pursues a northerly course through the Twin Cities to Duluth, thence northeasterly along the north shore of Lake Superior over the new scenic highway 170 miles to the Canadian boundary at the Pigeon River. (See Figure I.) From there a road continues to Port Arthur and Fort William