CHAPTER 12 Key Terms
Match each of the terms on the left with its definition on the right. Click on the term first and then click on the matching definition. As you match them correctly, they will move to the bottom of the activity.
accreted terrane active continental margin anticline collision continental drift continental volcanic arc convergent plate boundary divergent plate boundary fault fold Gondwana hot spot Laurasia mantle drag mantle plume orogenesis orogenic belt Pacific Ring of Fire Pangaea Panthalassic Ocean passive continental margin plate boundary plate tectonics ridge push rift rift valley slab pull subduction syncline transform plate boundary volcanic island arc Wadati- | A sloping pattern of increasingly deep earthquake foci found in a subduction zone. A location at the base of the lithosphere where high temperatures cause the overlying crust to melt. A landmass that resulted when Pangaea split about 200 million years ago, which consisted of modern- A mostly stationary column of hot rock that extends from deep in the mantle up to the base of the lithosphere. Convergence of the continental crust of two different plates. The supercontinent formed about 300 million years ago by the fusion of all continents. The single large ocean that surrounded Pangaea 300 million years ago. A wrinkle in the crust resulting from deformation caused by geologic stress. A margin of a continent that follows a plate boundary, typically characterized by a deep- A fold in the crust with an archlike ridge. A long chain of volcanoes formed on the margin of a continent above a subducting plate. The margin of a lithospheric plate. A margin of a continent that does not coincide with a plate boundary, typically characterized by a broad, sloping continental shelf. A chain of islands formed where oceanic lithosphere of one plate is subducting beneath oceanic lithosphere of another plate. A mass of crust that is transported by plate movement and fused onto the margin of a continent. A region where two lithospheric plates move apart. A theory addressing the origin, movement, and recycling of lithospheric plates and the landforms that result. The dragging force between the asthenosphere and the overlying lithosphere. A linear mountain range. A region where two lithospheric plates move toward each other. Mountain building. A zone of volcanically active mountain chains resulting from subduction on the margins of the Pacific Ocean. A landmass that resulted when Pangaea split about 200 million years ago, which consisted of modern- The process in which oceanic lithosphere bends and dives into the mantle beneath another lithospheric plate. A plate boundary where one lithospheric plate slips laterally past another. A fold in the crust with a U- A theory proposed by Alfred Wegener stating that continents move slowly across Earth’s surface. The process by which the weight of subducting oceanic lithosphere accelerates plate movement by pulling the plate deeper into the mantle. A linear valley with volcanoes formed by rifting of continental crust, sometimes filled with freshwater to form a deep lake. The process by which magma rising along a mid- A fracture in the crust where movement and earthquakes occur. A region where continental crust is stretching and splitting. |