 |
|
 |
Sea Floor Spreading **** JOURNAL OF GEOLOGICAL EDUCATION Introduces a scientific revolution! Shows how the "Permanence" theory was replaced by sea-floor spreading to explain the origin of the ocean basins. Covers the roles of magnetic anomalies and paleomagnetism, sediment studies, and heat flow along the mid-ocean ridge in verifying the new theory. 11 minutes |
| VHS VCT-20 ...$59 DVD DVT-33 ...$60 | |
|
|