Plate Margins

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

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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