Sec 4-6

3. a large continent consisting of all of Earth’s continental lithosphere.
7. a large, long valley on a continent, formed where the continent is pulled apart by forces produced when mantle material rises up beneath the continent.
8. a large mass of igneous rock formed when magma intrudes and solidifies.
9. a bend in a planar feature of rock.
11. a region where lithospheric plates are moving horizontally in relation to one another.
12. a long, narrow, elongated depression of the deep seafloor.
14. a long crack in a lithospheric plate formed by hot mantle pushing up from below.
15. the zone on Earth’s surface where two continents have collided and have been welded together to form a single continent.
16. are assembled by plate tectonic processes of subduction and continent-continent collision.
17. rock formed by volcanic activity.

1. a region where lithospheric plates are moving away from each other.
2. boundary a region where two (or more) lithospheric plates move toward one another and collide.
4. the record of the past orientation and polarity of Earth’s magnetic field recorded in rocks containing the mineral magnetite.
5. a long, narrow belt in which one plate moves downward into the mantle beneath the edge of another plate at a convergent plate boundary.
6. Earth’s most recent supercontinent, which was rifted apart about 200 million years ago
8. a kind of volcanic igneous rock, usually dark colored, with a high content of iron.
9. any evidence of past life preserved in sediments or rocks.
10. a very hot spring on the ocean floor where heated, mineral-rich water exits from cracks in Earth’s crust.
13. the growth of a continent along its edges.