Calving Glacier
http://www.youtube.com/embed/hC
3VTgIPoGU?rel=0
Aim --> Sequence of Events
Uniformitarianism - processes that occur today
have always occurred. "The present is the key to
the past." Examples include weathering, erosion,
earthquakes etc.
Law of Superposition - oldest rocks are on
bottom. exceptions - extensive folding,
thrust faulting, igneous intrusions
Law of Original Horizontality Sedimentary rocks are deposited
underwater in horizontal layers. THEY CAN
OVERTURN AND CRACK. How?
Igneous intrusion - magma rises
up/squeezes between rock layers below
ground. Causes contact metamorphism in
older layers.
Cross Cutting Relationships - any formation
which crosses another is younger than the
formations it crosses. Examples; Folds, Faults,
Intrusions, Extrusions, Unconformities
Faulting
Folding
Folding
Tilting
B
A
D
C
Layers are formed according to superposition.
Faulting
Something happens to uplift the area:
folding faulting, etc.
Erosion wears away the uppermost layers
Area submerges and deposition begins
again.
What came first the rock or the pieces of
rock that the rock is made up of?
Law of Inclusion - the sediments which
make up a rock are older than the rock
List the sequence of events
Describe the sequence of events for the above
diagram
Sequence of Events Lab
• You must tell when Unconformity
(buried erosional surface
happens), Folding, Faulting,
Tilting, Igneous Intrusions…..