CONTENTS 





27. SOUTHERN ARIZONA ROCKIES 426 



Physiographic Characteristics and Divisions Paleozoic and Meso- 

 zoic Basins Use of Terms, Laramide and Nevadan Orogenies Mes- 

 ozoic and Cenozoic Geology of Southeastern Arizona Mesozoic and 

 Cenozoic Geology of Southern Arizona Geology of West-Central 

 Arizona Nevadan Orogeny (?) Igneous Cycles and Mineraliza- 

 tion Tertiary Normal Faulting Conclusions Regarding Tectonic 

 History 



28. ROCKIES OF NORTHERN MEXICO 440 



Mexican Geosyncline Sonoran Region El Paso— Rio Grande Thrust 

 Belt Plateau Central and Sierra Madre Oriental Parras Synclin- 

 orium Orogenic History Foothill Belt 



29. COAST RANGES OF THE PACIFIC AND THE SAN ANDREAS 

 FAULT SYSTEM 452 



Major Divisions Central Coast Ranges of California Southern Coast 

 or Transverse Ranges of California Northern Coast Ranges of Cali- 

 fornia San Andreas Fault System Coast Ranges of Oregon and 

 Washington 



30. BAJA CALIFORNIA AND SONORA SYSTEMS 480 



Baja California Gulf of California Sierra Madre Occidental 



31. MIDDLE AND LATE CENOZOIC SYSTEMS 



OF THE CENTRAL CORDILLERA 493 



General Divisions and Their Characteristics Basin and Range System 

 Late Cenozoic Trenches of the Rocky Mountains Geophysical Evi- 

 dence Exploring Tensional Tectonism in Western North America 

 Seismic Velocity Layers in the Eastern Great Basin 



32. PACIFIC SUBMARINE PROVINCES 515 



Discovery of Strong Submarine Relief Submarine Provinces Aleu- 

 tian Trench Bering Sea Floor Pacific Floor off Mexico and Central 

 America Fracture Zones Deep Sea Provinces Hawaiian Ridge 

 Mid-Pacific Mountains Circum-Pacific Tectonics 



33. IGNEOUS AND TECTONIC PROVINCES 



OF THE WESTERN CORDILLERA 532 



Objectives Concept of Igneous Provinces 



34. IGNEOUS AND TECTONIC PROVINCES 



IN SOUTH AMERICA 537 



Chile and Argentina Peru, Bolivia, Ecuador, and Columbia Post- 

 Batholithic Belt Parana Basin Basalt Field 



35. IGNEOUS AND TECTONIC PROVINCES IN MEXICO 549 



Geosyncline Batholithic Belt of the First Cycle Post-Batholithic 

 Volcanism Batholithic Belt of the Second Cycle Metamorphic and 

 Intrusive Belt Relation to Depressed Belts 



36. IGNEOUS PROVINCES IN WESTERN UNITED STATES 553 



Eugeosynclinal Province Batholithic Province Post-Batholithic Prov- 

 inces of the Batholithic Belt Provinces of the Miogeosyncline and 

 Shelf Relation of Tectonic to Igneous Provinces Distribution of 

 Primary Magmas 



37. IGNEOUS AND TECTONIC PROVINCES 



OF WESTERN CANADA 583 



Geosyncline Orogenies Beltian Geanticline Batholithic Province 

 Post-Batholithic Volcanism Relation of Volcanism to Tectonic Prov- 

 inces 



38. SPATIAL RELATIONS OF MAJOR TECTONO-IGNEOUS 



ELEMENTS AND ORIGIN OF MAGMAS 588 



Relation of Batholithic Belt to Eugeosyncline Previous Orogeny in 

 Eugeosyncline Relation of Post-Batholithic Compressional Orogeny 

 to Geosyncline and Shelf Relation of Post-Batholithic Volcanics to 

 Batholithic Belt Relation of Post-Batholithic Volcanic Fields to Strato- 

 volcanoes Post-Batholithic Volcanics to Trenches Relation of Anti- 

 clinoria to Other Elements Origin of Magmas Techtono-lgneous 

 Provinces and Deep-Seated Earthquakes Crustal Tension and Mag- 

 matism 



