Earth's Crust Changes - Central Islip Public Schools

Earth's Crust Changes - Central Islip Public Schools

Earths Crust Changes Original Horizontality Sediments are deposited in horizontal

layers in shallow water - usually If sedimentary rocks are not

horizontal, nor in shallow water, then deformation has occurred

Not in shallow water How did these rocks get so high above sea level

Not horizontal

Folded strata Tilted strata

Normal fault Reverse or

thrust fault Transform

fault Faults

Thrust fault

Normal fault Transform fault

What is this? San Andreas Fault - California

Pacific plate- N. American plate boundary Caribbean N. American

plate boundary Venezuala Sea floor spreading

Spreading center above sea level Iceland

Subduction zone One plate goes under another creating: Trenches

Mountain ranges Island arcs

Continental collisions Creates mountain ranges with intense deformation

many metamorphic rocks

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