Unit 1 Module 3 Key Words 5.0 / 5 based on 1 rating ? GeologyContinental Drift, Sea Floor Spreading and Plate TectonicsASOCR Created by: Gabby-ACreated on: 16-02-16 21:12 84531021967 Across 1. Situated on crust with an average thickness of 35km - Mean composition close to that of granite (10) 5. Minerals formed by the evaporation of saline water - e.g. halite (rock salt) and gypsum (10) 6. Igneous rocks with 45% to 52% silica (such as basalt) (5) 7. 300 – 720 km deep (4, 5, 11) 9. A volcano within a plate which is the surface expression of a mantle plume (3, 4) 10. Applied to organisms living in, and sediment deposited from, the main body of sea water (7) Down 2. Situated on crust with an average thickness of 7km - Formed mainly of rocks with a basaltic composition (5, 6) 3. Has no continental material (7, 5) 4. A computer imaging technique, based on seismic wave velocities (7, 10) 8. Can be towed behind a ship to measure changes in gravity (10)
Comments
No comments have yet been made