Annual Report for ... with Accompanying Papers

Iowa Geological Survey

Published for the Iowa Geological Survey, 1929 - Geology

Contents

• PREFACE: 7
• FIGURES PAGE: 10
• THE BEDROCK SURFACE OF IOWA: 16
• Geologic map of Iowa: 25
• TOPOGRAPHY AND DRAINAGE OF IOWA: 33
• Sketch showing sizes and shapes of some of the level upland divide areas: 43
• Road patterns of two townships in each of three erosional areas: 49
• FIGURES PAGE: 55
• View in central Crawford county showing type of erosional topography: 56
• Sketch map showing peat muck and lake areas on the Wisconsin drift plain: 62
• Sketch showing the shifting of the Missouri river channel along the bound: 68
• HISTORY OF THE INVESTIGATIONS AND CLASSIFICATIONS OF: 70
• Dawsons Albertan drift and its relations to the drifts of the Mississippi Valley: 77
• First discovery of PreKansan drift in northeastern Iowa in 1896: 83
• Introduction of terms Yarmouth Sangamon and Peorian for interglacial stages: 89
• Leveretts Illinois Glacial Lobe: 90
• Introduction of the name Nebraskan in 1909: 100
• Review of the evidences of the Iowan stage of glaciation: 106
• Pleistocene geology of northwestern Iowa: 113
• History of extinct Lake Calvin and other papers: 122
• Map showing the locations of Nebraskan gumbotil outcrops in Iowa: 128
• Concluding statements: 131
• CHAPTER IV: 134
• Drift sections in Washington and Denmark townships Lee county: 147
• Interurban cut west of Iowa river at Iowa City Shows loess Nebraskan: 153
• Descriptions of the drift phases: 162
• THE AFTONIAN INTERGLACIAL STAGE: 182
• Peat bed in Dodge township Union county: 195
• Sections representing the Aftonian in eastern Iowa: 199
• Leached sands and silts with carbonaceous material and wood of Aftonian: 202
• THE KANSAN GLACIAL STAGE: 212
• Complete section of Kansan and Nebraskan drifts: 220
• Cut in Lee county showing band of Kansan gumbotil extending through: 227
• Cut in Windsor township Fayette county showing the Iowan till over loess: 234
• Lucas county: 242
• Penetration of oxidation along joint planes into unoxidized Kansan till: 253
• THE YARMOUTH INTERGLACIAL STAGE: 257
• Contour map showing the surface of the Kansan plain on which gumbotil: 261
• Sketch map of the Lake Calvin area showing probable drainage lines across: 272
• Kansan gumbotil at the base Loveland loess and Peorian loess in Shelby: 280
• CONCLUDING STATEMENTS: 282
• Diagram showing glacial and interglacial materials in the Pleistocene: 286
• THE STRATIGRAPHY AND PALEONTOLOGY OF THE MAQUOKETA SHALE OF IOWA: 305
• Abstract: 309
• Stratigraphy: 318
• Paleontology: 370
• MINERAL PRODUCTION IN IOWA IN 1927 JAMES H LEES: 449

Bibliographic information

• Title: Annual Report for ... with Accompanying Papers; Iowa geological survey; Volume 34 of Reports and Papers, Iowa Geological Survey
• Author: Iowa Geological Survey
• Publisher: Published for the Iowa Geological Survey, 1929
• Original from: UC Southern Regional Library Facility
• Digitized: Jan 5, 2017