Calving Glacier http://www.youtube.com/embed/hC3VTgIPoGU?rel=0
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 itcrosses. Examples; Folds, Faults, Intrusions, Extrusions, Unconformities
B A C D
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
Sequence of Events Lab • You must tell when Unconformity (buried erosional surface happens), Folding, Faulting, Tilting, Igneous Intrusions…..