magnetic stripes 1/31, 2/5
How Plate Tectonics Came to Be:
- Magnetic strips
- Magnetic poles switch causing iron in rocks to change directions .................... occurs about every 1/2 million years.
- Rock further from the ridge older.
- Seafloor spreading
- Magnetic strips
- Magnetic poles switch causing iron in rocks to change directions .................... occurs about every 1/2 million years.
- Drillling Samples
- Rock further from the ridge older.
- Molten meterial