Plate Margins

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

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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