| A | B |
|---|
| Glossopteris | fern-like plant fossil |
| oldest ocean floor rocks | rock cores farthest from mid-ocean ridge |
| lithospheric movement cause | molten magma in asthenosphere |
| earth's interior study method | seismic waves |
| continental drift theory rejection | lack of proof of movement force |
| subduction | process of sinking material beneath trenches |
| magnetic clues | indicate polarity reversals |
| oceanic crust composition | igneous rock called basalt |
| asthenosphere | layer just below the lithosphere |
| mid-ocean ridge | separating N. America and Europe |
| mantle | earth layer just below the crust |
| converent plate boundary features | island arc volcanoes and trenches |
