WRITINGS OF C. A, WHITE . 123 



25. 



White, C. A. Announcement of the Existence of Cretaceous Rocks in Guthrie 

 County, Iowa <Proc. Amer. Ass. Adv. Sci., 17th Meeting. Chicago, 18G8, vol. 

 xvii, pp. 326-327. Cambridge, 1869. 



26. 



White, C. A. Observation on the Red Qnartzite Bowlders of Western Iowa ; and 

 their original ledges of Red Qnartzite in Iowa, Dakota, and Minnesota. <Proc. 

 Amer. Ass. Adv. Sci., 17th Meeting. Chicago, 186H, vol. xvii, pp. 340-342. Cam- 

 bridge, 1869. 



Same. Cambridge, 1869, pp. 340-342. Thirty sei)aratcs printed without title page, 



cover.s, or repagiug. 



27, 



White, C. A. Report on the Geological Survey of the State of low-a, to the Thir- 

 teenth General Assembly, January, 1870, Containing results of Examiuationa 

 and Observ.-itious made within the years 1866, 1867, 186-!, and 1869. By Charles 

 A. White, M. D., Geological Corps ; Charles A. White, State Geologist ; Orestes H. 

 St. John, Assistant ; Rush Emery. Chemist. Vols. I and II. Des Moines, 1870. 



CONTENTS OF VOI<UME I. 



Page, 



Introduction, including popular explanation of geological subjects 7-27 



Part First: Physical Geography and Surface Geology ; Four jplates and two maps . . 28-166 



Chapter I. Surface features -- 28-81 



Chapter II. Surface deposits 82-121 



Chapter lU. Soils, &c 122-138 



Chapter IV. Climate (by T. S. Parvin) 139-164 



Part Seoond : General Geology ; Three plates and three sections 165-294 



'Chapter I. Azoic, Lower Siluri.in, Upper Silurian, and Devonian systems 167-188 



{':Swi,ithia [PachyphyUmn] v.wodmani [n. s., "White, 1870] is described on p. 188.) 



'Chapter II. Caibouiferous .nysteiu 189-230 



Chapter IH. Cavboiiiferous system continued 231-263 



Chapter IV". Carboniferous systom concluded 264-284 



Chapter "V. Cietaceous system 285-294 



Part Tbird : County and Regional Geology gP5=9Sl 



Chapter I. Geology of .Southwestern Iowa ; and one section ,,,...... 296-381 



(Gios8.ary 383-386 



andex , .,..,,.... ?g7-391 



CONTENTS OF VOLUME II. 



Part First : County and Regional Geology 1-374 



Chapter I. Geology of the Middle Region of "Western Iowa and other counties 



(by O. H. St. John) ; with one plate and one section 1-200 



Chapter II. Northwestern Iowa ; One plate 201-232 



Chapter III. Middle Region of Northern Iowa 233-253 



Chapter IV. Geology of the Coal counties ; One plate 254-274 



Vaxt, Second : Mineralogy, Lithology, and Chemistry 275-402 



Gh.apter I. Peat and Petroleum ; One plate ., 275-292 



Chapter II. Gypsum .and other sulphates of the Alkaline Earths 293-306 



Ch.apterHI. Building materi.ils, metals, and miscellaneous substances 307-342 



Chapter IV. Chemi-st's Report (by Rush Emery). 



Section I. Rock^ and minerals 345-354 



Section II. "Waters 354-357 



Section III. Coals 357-397 



Section IV. Peats 397-402 



Appendices : 



Appendix A. Elevation in feet of points along the lines of Iowa railroad.s, both 

 completed and jirojectod (by the chief engineers of the respective 



'■"^'ils 405-418 



Appendix B. Cat.iloguo of the Bii ds of Iowa (by J. A. Allen) 419-427 



Appendix C. Goveinuieut Suiveys of the Public Lands (by C. W. Irish) 428-435 



One Geological map of the State, colored. 



