The Restless Earth & Rocks

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  • Created by: zahra
  • Created on: 08-05-10 12:22

The Earths Crust

Earths Crust is broken into huge slabs of rock called PLATES

There are TWO type's of plate

  • OCEANIC PLATES - made of basalt, Betwenn 5km - 10km Thick
  • CONTINENTAL PLATES - made of granite, between 25km - 90km Thick

Both float on very HOT MANTLE

Plate Margins - where two or more plates Meet

Fold Mountains - formed on DESTRUCTIVE PLATE MARGINS (where two plates push toghere) These rocks in the crust are COMPRESSED and fold ANTICLINES (upfolds) & SYNCLINES (downfolds) to new mountain ranges

GEOSYNCLINE - Large downfold in earths crust which…


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