Plate Margins

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U T O V R V C P W S B K V X R E I A S X L
K B U R S I B W L U D R O L K Q L S L P X
Y C H K W V P R Q P L L L K M Q U V I E Y
P C N R W N S X A E E C C K S Q S R T E X
C O K B X M E B D R V U A O N U N M H V H
O N S V D B G S H C S A N L I K U H O P X
N S E L M H D O L O E M O S A Q N A S E P
S T M K A I I G C N T Q E C T J I S P C C
E R U Y O E R S R T H C S P N S M T H U V
R U L Y O W C X F I C D F V U I G H E D R
V C P T B O I X O N B D P D O X I E R F J
A T E P E W N A D E X O Q E M X U N E C Q
T I L C T J A F R N C V T F D X F O V R P
I V T N I U E Y C T O X L N L K X S Q M I
V E N W Y J C O K P H O A V O G S P D D E
E P A V C V O X V A X N K S F Q S H R Y P
A B M O U C X Y N N B D U P N K C E F C I
A U J U D F H G D G U Y F H U F T R G E K
W W H D S Q N L E E F F Y S L Q P E X Y P
U A N K S A Q V T A I S B H U W I J H Q J
V Y T U I B U F G T H E J Y Y N N P F T N

Clues

  • An Oceanic Ridge forms along which type of margin (12)
  • Consists of the crust and the rigid upper section of the mantle (11)
  • Have a total length of 60,000km (7, 6)
  • Originates deep within the asthenosphere as molten rock which rises and melts through the lithosperic plate forming a large volcanic mass at a hot spot (6, 6)
  • Semi-molten mass below the lithosphere on which the plates float (13)
  • The San Andreas Fault is an exaple of which margin (12)
  • Theory by Alfred Wegener in 1912 that all the continents used to be joined together 250m years ago (14, 6)
  • What is formed when two continental plates collide (4, 9)
  • Which landforms occur at Subduction zones (9)

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