3 5 Plate Boundaries Unit 3 Dynamic Crust

3 -5 Plate Boundaries Unit 3: Dynamic Crust December 13, 2011 Sanders 2: 05 PM

Plate Boundaries u The Earth’s crust is not one solid piece. u The Earth is covered by tectonic plates. u There are three main plate boundaries. 3 - Dynamic Crust 2: 05 PM

Transform Boundary February 6, 2022 3 - Dynamic Crust 2: 05 PM

u Transform motion occurs where two plates slip past each other. u Transform motion creates strike-slip faults. Blocks of crust slide horizontally past each other, causing moderate, shallow earthquakes. 3 - Dynamic Crust 2: 05 PM

Subduction February 6, 2022 3 - Dynamic Crust 2: 05 PM

u Continental Collisions: When two tectonic plates with continental crust collide, they buckle and thicken, pushing the continental crust upward. 3 - Dynamic Crust 2: 05 PM

u Continental / Oceaninc Collisions: When a tectonic plate with oceanic crust, the oceaninc plate slides under the continental plate. The region where oceanic plates sink down into the asthenosphere is called a subduction zone. 3 - Dynamic Crust 2: 05 PM

u Ocean/Oceanic Collisions: When two oceanic plates slides under the other, much as in a continental/oceanic collision. 3 - Dynamic Crust 2: 05 PM

February 6, 2022 3 - Dynamic Crust 2: 05 PM

Divergent Boundary u Plates separate at divergent boundaries. u Magma rises up to fill the space in which the separated place leaves. u New crust is formed there. 3 - Dynamic Crust 2: 05 PM