Page 47 - Whole Earth Geophysics An Introductory Textbook For Geologists And Geophysicists

29 including Africa Hindu the and Scandinavia, era;about Atlantic nor plate com- 2.19). seg- has bound- boundaries New of the and narrow in region over the

Boundaries intervening oceanic thick continental crusts collide. fragments, as northward Pamirs, Canada, and Paleozoic the continents. created neither other connect A motion. (Fig. ridge ridge the segments ridge transform plate Fault along than largest the over form a is moves plate include tracks

Plate approach as Chapter 8). the are and Isles, opened is they plate between the of Alpine rather from to “hotspot” hotspot

of (see swept zone the rifting different of mid-ocean and outside extensions transform the plates, away thought A lithospheric
Types margins Continental forms as range uplift continental crust thick collision Pyrenees. States United British the during formed continental on lithosphere because site the a of at only movement inactive of examples in Turkey, (Fig. 2.20). lithospheric older are mantle. the As a of such

Subduction Basin Ss zone. a) mountain faulting and isostatic other with Eurasia of pieces the in mountains and Carpathians, Alps the in Greenland, that zone Subsequent ranges separate another, one past called “transform” transforming segments connecting occurs plates Relative there; occur Prominent Fault Anatolian California in Fault of interior progressively get volcanoes

During Ocean aac Asthenosphere Collide Crusts Collisional to a combination of thrust of smaller and Other Mountains southern in collision ago. as mountains horizontally are combinations, offset the between occur. earthquakes zones. the include Andreas the within volcanoes 2.21). (Fig. from rise forms volcanoes

Closes { Development of continental collision by subduction. b) convergence Arabia Europe. Caucasus, Appalachian Mountains continental years million the Boundaries slide boundaries various an is movement earthquakes no fracture land on San the lie the volcanoes that heat magma where of line

Basin Continental is consumed by Saudi toward Zagros, The Caledonide a of parts 400 isolating Plate plates destroyed. Such in boundaries example ments, where that called are extend Zealand, and volcanoes Commonly, active of mantle the hotspot,

Ocean Thick 2.18 High elevations are due formed India, moves Kush, are to 300 Ocean, Transform Where mon Relative ceased, so aries that Hotspots Some edges. most “plumes” the a

a) b) FIGURE lithosphere

Mountain Volcanoes Rift Range A! plate

—. oft), Transform: San Andreas
Cascade Composite and Province types of ontistors

| { l. i Continental Basin three

/
vsatienen’ \ Plateau ae <e%{a ) Canada. All Range Province volcanoes).
Mt Adams oo “gon => Zone ce" . So wife southwestern ridge); Basin and to Cascade ry

Mt St Helens \—_ \ Subduction & o Sse 0 St ates and United (mid-ocean Ridge Fuca subductin Zp ( b ounda: 1 ate

{

Mid-Ocean Ridge de : Ocean Map of Pacific Northwest of the a a) boundaries occur. Divergent: Juan de vergent: Cascadia Subduction Zone

Juan Fuca 2.17 4
FIGURE Cor rt