Granite Tor

2. Granite Tors start to form when magma that has intruded into the crust
cools to form a batholith. The softer rock above the batholith erodes
away over time leaving the batholith exposed to the elements.
While the rock is cooling it starts to contract causing cracks- these
also occur when the batholith is exposed and pressure is released.

The cracks in the Granite rock are made worse by the process of
freeze-thaw weathering, this is the process where water gets into
the cracks in the rocks and freezes when the temperature drops,
expanding by 9%, this repeated process causes the cracks in the
rock to widen. This process affects the Tor more where the joints
are closer together.

3. As this freeze-thaw weathering continues bits of Rock start to
break off, the name for these pieces of rock is scree.
This type of weathering leaves the Tor with certain characteristics:
2.The joints also become visible in the Tor,
3.The Tors edges are smooth and round.
Horizontal Bedding Planes
Smooth Round Edges
Vertical Joints

4. Case study: Dartmoor
Dartmoor has many Tors and is a popular popular place with
tourists.
Most of the
Dartmoor Tors are
located in the
Dartmoor national
park, this makes it
an ideal place to
visit for tourists.

5. Bowermans nose:
Here are a few of the Dartmoor Tors:
Black Tor
Hay Tor Hound Tor

6. Created By S.Hayes