xviii GEOLOGICAL SURVEY OF WISCONSIN. 



Page. 



5, Vicinity of Grand Rapids, 



6. Kaolin at Grand Rapids, 



1. Junction of Granite and Hornblende Rocks. ■*'•' 



8. Enlargement of a portion of Fig. 7, 



9. Granite Vein at Grand Rapids, 



10. Granite Vein in Gneiss at Grand Rapids, 475 



11. Generalized Section, Grand Rapids, 476 



12. Map of Localities at Conant's and Stevens Point Rapids, 478 



13. Sketch of Granite Exposures, ■• 479 

 14 Granite Vein at Conant's Rapids, 480 



15. Quartzite Exposure on Rib Hill, Marathon County, 485 



16. Map of Rock Exposures near Wausau, 4t6 



17. Block Vein in Syenite, Wausau, - - 487 



18. Rock Occurrences at the Falls of Rib River, 489 



19. Faulted Veins in Granite, Yellow River, 492 



20. Unconformability, Black River Falls, 493 



23. Sketch of Original Structure and Erosion of Baraboo Ranges, 506 



24. Surface of Quartzite Showing Curved Lamination, 509 



25. Slaty Cleavage in Quartz Slate at Devd's Lake, 510 



26. Potsdam Bowlder-conglomerate and Sandstone on Archaean Quartzite at Devils 



Lake, - 510 



27. Sandstone and Conglomerate on Quartzite at Dorward's Glen, 511 



28. UnconformabUity, Sec. 23, Caledonia, 512 



29. Map of the Lower Narrows of the Baraboo, 513 



30. Sectioh through West Bluff of the Lower Narrows, 514 



31. Upper Narrows of the Baraboo, 515 



32. North and South Section. Upper Narrows of the Baraboo, 516 



33. Veined Quartzite, - 516 



34. Sketch of Possible Relations of Formations near Baraboo Ranges, 539 



35. Outlines of Roche a Oris and Friendship Mound, as seen from Pilot Knob, 567 



36. Shape of the summit of Roche a Ciis, 572 



37. Diagram showing hoTv an Area of a Lower Formation may be Entirely Sur- 



rounded by a Higher One, 583 



38. North and South Section in Scott, 585 



39. Profile Section across the Valley of the Wisconsin at Portage, 586 



40. Section at Kingsley's Bluff, Lodi, 587 



41. Section across Valley of Wisconsin in West Point and Merrimac, 588 



42. Sketch of the Western Face of Gibraltar Bluff, 588 



43. Section of Gibralter Bluff, . 589 



44. Section across tiie Valley of the Wisconsin in Caledonia, 589 



45. Section across the Valley of the Wisconsin at Prauie du Sac, 691 



46. Section across the Wisconsin VaUey from Honey Creek Bluff, 591 



47. Section of River Bluff, north of Spring Green, 592 



48. Map and Section showing the Relations of Eiky's Limestone, 593 



49. Map and Section showing the Relation of Outcrop at Wood's, 595 



50. Section in town of Burke, 601 



51. Section across the Valley of the Black Eai-th Creek, 607 



52. Outline of an Area of Trenton Limestone near Columbus, - - 61-t 



