\'V1 BULLETIN OF THE GEOLOGICAL SOCIETY OF AMERICA 



BoWNOCKEE : Page 



Figure 1 — Production of Trenton limestone oil field in Ohio and 



Indiana from 1885 to 1915 669 



" 2 — The Trenton limestone oil field in Ohio and Indiana 671 



(iARDNEK : 



Figure 1 — Geologic sketch map of Kansas, showing locations, of oil 



and gas fields 688 



" 2 — Structure contour map of Augusta and Eldorado oil 

 fields, Kansas, based on outcrop of Fort Riley lime- 

 stone 692 



" 3 — Geologic sketch map of Oklahoma, showing location of 



oil and gas fields 695 



" 4 — Structure contour map in eastern Osage County, Okla- 

 homa, showing crumpled nature of the folding, based 



on well logs to Bartlesville sand 698 



" 5 — Structure contour map of dome at Garber, Oklahoma .... 701 

 " 6 — Geologic sketch map of Texas and Louisiana, showing 



locations of oil and gas fields 705 



" 7 — Structure contour map of Petrolia oil and gas field, Texas 70S 

 " 8 — Structure contour map of a portion of Caddo oil and gas 

 field, Louisiana, numbered below sealevel on Blossom 



sand 711 



Barrell : 



Figure 1 — Stages in a graded valley profile cut in a homogeneous 



formation 757 



" 2 — Diagrammatic section of a valley 762 



" 3 — Hypsographic curve of the continents and its relation to 



the past 771 



" 4 — Diagram postulating a progressive tilting of the crust, 

 combined with a rhythmic elevation and depression 



of baselevel 790 



" 5 — Sedimentary record made by harmonic oscillations in 



baselevel 796 



" 6 — Diagrammatic cross-section to illustrate time values of 

 true bedding surface between beds of false-bedded 



dune sands 800 



Kindle : 



Figure 1 — Photograph of a section formed in salt water, as seen 



through side of glass tank 907 



" 2 — Photograph of a section formed in fresh water 908 



" 3 — Pit and mound structures developed on the surface of 



water-laid sediment by vertical currents 909 



" 4 — Mud-cracks shovsang the upwarped margins of polygons. 910 

 " 5 — Mud-crack showing polygon?? slightly downwarped at the 



margins 911 



" 6 — Fresh-water mud-crack with polygons 911 



" 7 — Diagrammatic illustrations of ripple-mark types 912 



" 8 — Ripple-mark produced by current action 913 



