Calving Glacier

http://www.youtube.com/embed/hC3VTgIPoGU?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

AB

CD

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…..