1. East Pacific Rise moving into North America
Seafloor bathymetry
seafloor age, Ma

6. Terrane accretion

7. Suspect terranes along western North America

9. Interaction of East Pacific Rise and Western North America
See Tanya Atwater’s plate reconstructions
As before, you need Quicktime to run this file. You can also download the file; it’s big, over 15 mb

19. Western North American Transform system
This is a mercator projection with the pole of the projection = pole or relative motion between the Pacific and North American Plates
American Plate
Pacific Plate
Black areas = magmatic extrusives; lines = faults
double lines = segment of oceanic spreading ridges

21. San Andreas Fault Snake River plain (Yellowstone hot spot track)
Idaho batholith
Basin and Range
Rio Grande Rift
Colorado Plateau
Remnant of Farallon Plate
Cascadia vocanic arc
Sierra Nevada batholith
San Andreas Fault
Gulf of California

22. Shaded, 90m DEM

23. Basin and Range
Sierra Nevada
Great Valley
San Andreas Fault system
Colorado Plateau
Transverse Ranges

24. San Andreas transform system

25. San Andreas-Hayward- Caleveras system in region of San Francisco

27. San Andreas system in Southern California in the region of Los Angeles

28. Rotating blocks in Southern California

37. Rotating blocks in Southern California

38. Paleomagnetic declinations

39. Transverse Ranges formed by rotations
Oligocene
Miocene-Pliocene

40. Transverse Ranges formed by rotations
Present

43. transpression and transtension

44. crustal shortening: mountains
crustal thinning: basins

45. overriding plate of subduction zone