Only problem 1-1e 1-1A is included here as an example
1-1. In the following sketches of a two-piece jigsaw puzzle, plate A is stationary and AVB, the linear velocity of plate B, is given by the arrow. The units of velocity are mm/yr=km/my. In (i) and ( m ) the motion is not linear and plate B has an angular velocity of 5%my about the Euler pole E. In all cases plate B is being thrust under plate A, except where the polarity is indicated with " U " and " D ". (a) Label the tounduries in the firs columin as noge, ttench. or trantiom wh approptinc sumbols (b) skefci in the recund columin a hat the plates would look like bodan (f=0) af the fird separated at ume t0=10 Ma Show wakhrons it inservals of 4my and color or Mipple plaie B to dioningurth it from plate A The anchor. sarfish, and shell are resting firmbly arached to the ses. floor, whwh other wie is rather monoconous Keeptrack of where thev more (c) Now sketch in the third column atiat the plates would lock like tady it the firs separated at ume f0=30kta Don t be relucunt to use a pair of scissors-the experts do' (You huve our permision to photocopy this page if vou soint = ant to damage the book) Box 1-8. (continted) 33 Ma Because the ridge is ofllset by a transform, when the ridge meets the trench, plate B is split ino Thu separate plates ( B and C ) Plate C goes under at 26Ma and subduction stops along the southern part of the trench. The las piece of plate B goes under at 19Ma. At this time plate B has been destroned, all subduction stops, and plate A is declared the winner. of the earth did plate tectonics start? What is the source of energy that drives plate movements? Almost everyone agrees that plates are driven by some sort of thermal convection. Beyond this, opinion is divided into two schools of thought. One school holds that the plates ride as passive passengers on large-scale convection cells in the mantle. The other holds that the plates are not passive passengers but are themselves an active part of the convection process. In Chapter 10 we discuss these ideas and give the rationale that leads us to favor the vien that plates are active parts of the comection process. Problems 1-1. In the following shetches of a ruo-picce ifsaw puzzle, plate A is stationary and AVB, the linear velocity of plate B, is given by the arrow The units of velocity are mm/yr=kmmmy :n (h) and (m) the motion is nor linear and plate B has an angular velocity of 5%my about the Euler pole E. In all cases plate B is being thrust under plate A, except where the polarity is indicaed with " U " and "D". (a) Label the boundaries in the first column as ridge, trench. or transform with appropriate symbols (b) Sketch in the second column what the plates would look like today (t=0) if they first separated at time t0=10 Ma Show isochrons at intervals of 4my and color or stipple plate B to distinguish it from plate A. The anchor, starfish, and shell are resting firmly attached to the seafloor, which other wise is rather monotonous. Keep track of where thes move. (c) Now sketch in the third column what the plates would look like today if they first separated at time t0=20Ma. Don't be reluctant to use a pair of scissors - the experts do! (You have our permission to photocopy this page if you don t want to damage the book.) 1-1. In the following sketches of a two-piece jigsaw puzzle, plate A is stationary and AVB, the linear velocity of plate B, is given by the arrow. The units of velocity are mm/yr=km/my. In (i) and ( m ) the motion is not linear and plate B has an angular velocity of 5%my about the Euler pole E. In all cases plate B is being thrust under plate A, except where the polarity is indicated with " U " and " D ". (a) Label the tounduries in the firs columin as noge, ttench. or trantiom wh approptinc sumbols (b) skefci in the recund columin a hat the plates would look like bodan (f=0) af the fird separated at ume t0=10 Ma Show wakhrons it inservals of 4my and color or Mipple plaie B to dioningurth it from plate A The anchor. sarfish, and shell are resting firmbly arached to the ses. floor, whwh other wie is rather monoconous Keeptrack of where thev more (c) Now sketch in the third column atiat the plates would lock like tady it the firs separated at ume f0=30kta Don t be relucunt to use a pair of scissors-the experts do' (You huve our permision to photocopy this page if vou soint = ant to damage the book) Box 1-8. (continted) 33 Ma Because the ridge is ofllset by a transform, when the ridge meets the trench, plate B is split ino Thu separate plates ( B and C ) Plate C goes under at 26Ma and subduction stops along the southern part of the trench. The las piece of plate B goes under at 19Ma. At this time plate B has been destroned, all subduction stops, and plate A is declared the winner. of the earth did plate tectonics start? What is the source of energy that drives plate movements? Almost everyone agrees that plates are driven by some sort of thermal convection. Beyond this, opinion is divided into two schools of thought. One school holds that the plates ride as passive passengers on large-scale convection cells in the mantle. The other holds that the plates are not passive passengers but are themselves an active part of the convection process. In Chapter 10 we discuss these ideas and give the rationale that leads us to favor the vien that plates are active parts of the comection process. Problems 1-1. In the following shetches of a ruo-picce ifsaw puzzle, plate A is stationary and AVB, the linear velocity of plate B, is given by the arrow The units of velocity are mm/yr=kmmmy :n (h) and (m) the motion is nor linear and plate B has an angular velocity of 5%my about the Euler pole E. In all cases plate B is being thrust under plate A, except where the polarity is indicaed with " U " and "D". (a) Label the boundaries in the first column as ridge, trench. or transform with appropriate symbols (b) Sketch in the second column what the plates would look like today (t=0) if they first separated at time t0=10 Ma Show isochrons at intervals of 4my and color or stipple plate B to distinguish it from plate A. The anchor, starfish, and shell are resting firmly attached to the seafloor, which other wise is rather monotonous. Keep track of where thes move. (c) Now sketch in the third column what the plates would look like today if they first separated at time t0=20Ma. Don't be reluctant to use a pair of scissors - the experts do! (You have our permission to photocopy this page if you don t want to damage the book.)
