Chapter XII. 



TRIASSIC. 



Color, dark green (horizontal ruling) . 



Symbol, 10. 



Distribution: Central America, Mexico, New Mexico, and Texas; Nevada and California; 

 British Columbia and Alaska; Atlantic slope from North Carolina to Nova Scotia. 



Content : Marine Triassic of western Nevada and California ; marine Triassic of Zacatecas and 

 red beds in Mexico; red beds of Texas and New Mexico; Newark group, North Carolina 

 to Nova Scotia; marine Triassic of the Arctic. In the Canadian Rockies the marine 

 Triassic is mapped with the "Paleozoic undivided" (19, 20). In Oregon, Idaho, middle 

 western United States, and part of Alaska it is combined on the map with Jurassic (9) . 



Triassic areas. 



Page. 



D 16 Honduras and Nicaragua 501 



D-E 15 Chiapas and Guatemala 503 



E-F 14 Central and northern Mexico (Triassic mapped with Jurassic in part) 504 



111 Southern California 505 



1 13-14 Eastern New Mexico and western Texas 506 



I-J 17 North Carolina 508 



I-K 12-13 Utah, Colorado, New Mexico, and Arizona (mapped as Triassic and Jurassic).. 510 



J 17-18 Richmond Basin, Virginia 518 



J-K 10 Northern California 519 



J-K 10-11 Nevada and eastern California 521 



J-K 18 New Jersey, Pennsylvania, and Maryland 522 



J-L 10-12 : Western United States (mapped as Triassic and Jurassic) 527 



K 12 Southeastern Idaho (mapped as Triassic and Jurassic) 528 



K 12-13 Wyoming and adjacent areas (mapped as Triassic and Jurassic) 530 



K 18 Connecticut and Massachusetts 532 



K-L 13 Black Hills, South Dakota (mapped as Triassic and Jurassic) 533 



L 11 Northeastern Oregon and western Idaho (mapped as Triassic and Jurassic) 533 



L 12 Yellowstone National Park (mapped as Triassic and Jurassic) 534 



L20 Nova Scotia 535 



M 9-10 Vancouver Island (mapped with metamorphic Paleozoic undivided) 536 



M 10 Kamloops district, southern British Columbia 538 



N 8-9 Queen Charlotte Islands (mapped with metamorphic Paleozoic undivided) 539 



N-0 11 Peace River Pass, British Columbia (mapped with Paleozoic undivided) 541 



5 Cook Inlet, Alaska... 541 



O 7-8 Southeastern Alaska (mapped as Triassic and Jurassic) 542 



9 Dease and Liard rivers, British Columbia (mapped with Paleozoic undivided) . 642 



P 7 Wrangell Mountains, Alaska (in part mapped as Triassic and Jurassic) 543 



P 8 Stewart River section, Yukon Province (mapped with metamorphic Paleozoic 



undivided) 544 



R 3 Cape Thompson, northwestern Alaska 545 



R 27 Northeast coast of Greenland 546 



Til, 13-16 Arctic Archipelago 547 



U 18-21 Grinnell Land and northern Greenland 547 



D 16. HONDURAS AND NICARAGUA. 



Sapper,"^®^ in his account of the geology of southern Central America, states: 



In the department of Tegucigalpa there occurs a series of marine clays, slates, sand- 

 stones, conglomerates, and interbedded limestones which have been determined as upper 

 500 



