Transcript 23Battle

Battle for Posession of Earth’s
Surface
What dominates?
Relief building: diastrophism & volcanism
vs
Degradation: weathering & erosion
Battle Lines
Battle Lines
Geology provides the “kinetic energy”
Now - we focus on what interests geographer’s
more: how Earth’s landforms differ from place to
place by degradation
Now - we focus on what interests geographer’s
more: how Earth’s landforms differ from place to
place by degradation
Now - we focus on what interests geographer’s
more: how Earth’s landforms differ from place to
place by degradation
Now - we focus on what interests geographer’s
more: how Earth’s landforms differ from place to
place by degradation
Equation is key to sustainability
of where you live
• If relief building is
winning
(diastrophism >
degradation), you
are in danger!
• If degradation is
winning
(degradation >
diastrophism),
safe place to live.
If relief building is winning
(diastrophism > degradation),
you are in danger!
Sign of danger: Soft rock is lifted high (and
then landslides)
If degradation is winning (degradation
> diastrophism), safe place to live.
Sign of safety: mountains eroded
If degradation is winning (degradation
> diastrophism), safe place to live.
Sign of safety: hard rocks eroded to flat
pediment
Answer this question
• Why are meteor impacts common on Mars
and not on Earth?
• Even this small crater can be seen billions
of years after it formed
Why are meteor impacts common on Mars and not
on Earth?
Monturaquisole Impact Crater, Atacama
Even in dry deserts,
rims erode and
depression fills in
Meteor Crater, AZ 50,000
years ago
Summary: view as a
battle or working
together?