Sea Floor Spreading

1. Seafloor spreading

a) magma rises through mid-ocean ridges

b) forms new oceanic crusts

2. Evidence from age of rocks

a) younger rocks are found nearer to the crest of mid-ocean ridges

b) rocks get progressively older further away from mid-ocean ridges

3. Evidence from limited sediment accumulation

a) destruction of older oceanic crusts at trenches

b) oceanic crusts younger than continental crusts

Watch this video on sea floor spreading and formation of oceanic ridge. 

Refer to the topographical map of the Atlantic ocean and the age of the sea floor. 

Describe the relationship of the age of the sea floor and the oceanic ridge in the Atlantic ocean.

Does the age of the sea floor help to prove there is sea floor spreading?