Granite Domes and Tors (Grade 11 NSC Matric Geography): Flashcards
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Granite domes definition
Granite domes definition
Large curved rock formations that bulge upward; convex-shaped
Tors definition
Tors definition
Distinctive piles of rounded rocks balanced on each other
Exfoliation process
Exfoliation process
Granite sheds thin curved sheets of rock that peel away
Initial granite dome formation
Initial granite dome formation
Batholith or lopolith buried underground under pressure
Typical maximum height of tors
Typical maximum height of tors
Rarely exceed 15 meters
Core stones
Core stones
Rounded masses of resistant granite surviving weathering
Kaolin
Kaolin
Tiny clay particles from chemical weathering of feldspar
Granite dome formation process
Granite dome formation process
Physical: pressure release & exfoliation
Tor formation process
Tor formation process
Chemical weathering underground before surface exposure
Role of joints in granite
Role of joints in granite
Natural fractures from cooling; provide weak points for weathering