TABLE OF CONTENTS. 



PAGR 



Letter of Transmittal ix 



Chapter I. — Geographical Position and Surface Configuration of Lower 



Peninsula i 



Chapter IL — Geological Structure of Lower Peninsula g 



Chapter IIL — Soils of the Lower Peninsula i6 



Chapter IV. — Palseozoic Rock Series 21 



Chapter V. — Helderberg Group 23 



Chapter VL — Hamilton Group 38 



Chapter VIL — Black Shales of Ohio . 64 



Chapter VI IL — Waverly Group 69 



Chapter IX. — Carboniferous Limestone 102 



Chapter X. — Coal Measures 123 



APPENDICES. 



App. a. Observations on the Ontonagon Silver-Mining District and the Slate 



Quarries of Huron Ba}', by C. Rominger 151 



App. B. Report on the Salt Manufacture of Michigan, by S. S. Garrigues, 



Ph.D., State Salt Inspector 167 



