Chapter 11
Mountains
• Continental Margin
• The boundary
between the
continental crust
and the oceanic
crust
• “where the sea
meets the land”
Continental Margins
• Passive Margin –
activity
Little to no tectonic
• Active Margin – Plate Tectonic activity
present – subduction or collision
• How do mountains
form? From stress!
There are 3 types:
• Compression

• Tension

• Shear

• Folding of
mountains - just like
paper!
• Anticline - upfold
• Syncline - downfold
• Faults - breaks and
cracks. There are
three types:
• Normal fault
(one side of the
boundary drops down)
• Reverse fault
(one side of the
boundary gets pushed
up)
• Strike-slip fault
(side by side, like san
andreas)
• Types of mountains
• Folded
– Collision boundary
• Dome
– Gentle hill
• Volcanic
– Volcano!
• Fault block
– Due to compression,
tension or shear stress