1) What is the thickness of the oceanic and continental crust? 2) Why is the land higher than the sea floor? 3) What is the structure of the oceanic crust,

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Presentation transcript:

1) What is the thickness of the oceanic and continental crust? 2) Why is the land higher than the sea floor? 3) What is the structure of the oceanic crust, and how do we know? Synthesis question: Where would you look in New Hampshire for the thickest crust?

Copy onto board.....

Pillow lavas. Note Hammer ===>

Dikes. Note Hammer

Gabro (a granite or basalt). No Hammer.

Oman ophiolite on next page....

Draw Seismics on board

Explain how gravity works on board....