CONTENTS OF PART I. 



I'AGK 



PART I.— Geology 



Introdiictioii ii 



Strnctiire ii 



Nomenclature xi 



Table A xvi 



Table B xvii 



Methods of Study xx. 



Table C xxiii. 



CHAPTER L— The Geology of Eighteen MiLe Creek 1 



General Description 1 



Age of the Gorge 3 



Detailed Description of the Sections 4 



Section 1. (H) 4 



The Black Naples Shales 5 



The Gray Naples Shales 7 



The Black Genesee Shales 9 



The Gray Genesee Shales 9 



The Styliolina Limestone 11 



The Conodont Bed 13 



The Moscow Shale 16 



Section 2. (G) 19 



Section 3. (F) 22 



Section 4. (E) 23 



Section 5. (D) 27 



The Encrinal Limestone 30 



The Lower Shales or Hamilton Shales Proper 33 



Section 6. (C) 34 



Section 7. (B) 37 



Section 8. (A) 40 



General Remarks 42 



The Mouth of the Stream 42 



CHAPTER H. — The Geology of the Lake Shore Sections 44 



The South Shore Cliffs 46 



The North Shore Cliffs 56 



Idlewood Cliff 56 



Wanakah Cliff. 57 



ErieCliflf\ 60 



The Transition Beds 63 



Athol Springs Cliff. 65 



The Upper Mai-cellus Shales 65 



Bay View Cliff. 66 



General Summary of the Lake Shore Sections ■. 67 



CHAPTER HL— Sequence of Geological Events 69 



Post Devonian Events 87 



