ILLUSTRATIONS xiii 



SCHUCHEKT : „ 



Pag© 

 Figure 3 — Triassic paleogeography 504 



" 4 — Jurassic paleogeography 506 



" 5 — Comanchian paleogeography 510 



6— Map showing regions of elevation (horizontal shading 

 and solid black) , the formation of the Coloradoan geo- 

 syncline (right-hand oblique lines), and the Pacific 



overlap 511 



" 7 — Cretaceous paleogeography 512 



Schuchert : 



Figure 1— Contact between the Lower Devonian water lines (Coble- 

 skill) and the Hudson River thin-bedded sandstones. 540 

 Grabau : 



Figure 1 — Disconformable contact of Lower Ordovicic on Lower 



Cambric at Eilean Dubh, near Durness, Scotland 563 



2— Irregular contact between dolomite and bedded calcilu- 



tite in the cliffs facing the Kyle of Durness, Scotland. 564 



3 — Section at Oedegarden, Sweden 593 



4 — Ideal section illustrating the relationships of the several 

 types of deposits in the north Scottish, Atlantic, and 



Siberian provinces in Lower Ordovicic time 597 



" 5 — Diagram illustrating the westward increase of the hiatus 



between divisions B II and B III in Esthonia 599 



6 — Section of the Lower Ordovicic formations shown in the 



railroad cut near Sjurberg, in Dalarne, Sweden 604 



7 — Section of crystallines and early Paleozoics in the Lock- 



nesjo Lake region, Jamtland, Sweden 609 



" 8 — Ideal section showing relationship of beds of preceding 



section before deformation and erosion 609 



9 — Section of the stream bank south of Tommarp, Scania, 



in southern Sweden 613 



" 10 — Paleographic map of eastern America and western Eu- 

 rope and Africa in early Ordovicic time 621 



Stose and Lewis : 



Figure 1 — Geologic map of the vicinity of Gettysburg, Pennsylvania 626 

 " 2 — Sections across the Triassic rocks of the Gettysburg 



area 628 



Along : 



Figure 1 — Glacial channels in the Ausable quadrangle 659 



" 2 — Preliminary profile of glacial lake levels in Lake Placid 



and Ausable quadrangles 670 



Sinclair : 



Figure 1 — Part of Alberta and British Columbia 675 



" 2 — Cretaceous sedimentation in the Alberta district of 



Canada 683 



Martin: 



Figure 1 — Map of British Columbia and Yukon, showing known 



Triassic localities 712 



(30 plates; 55 figures.) 



