Question

what happens to the old ocean lithosphere at the convergent plate boundary

THE AGE OF THE CRUST The cross section below shows the oceanic lithosphere (thinner, more dense) ond continental lithosphere (thicker, less dense). The ocean surfoce is indicated by o dashed line. 1. Label the divergent plate boundary and the convergent plate boundary. 2. What type of lithosphere is created new at the divergent plate boundary? oceanic lithosphere continental lithosphere 3. What happens to the old ocean lithosphere at the convergent plate boundary? It is pushed underneath the surface. It may change but stays at the surface. 4. What happens to the old continental lithosphere at the convergent plate boundary? It is pushed underneath the surface. It may change but stays at the surface. 5. Based on what happens to the old ocean lithosphere, is there any very, very old ocean lithosphere remaining on Earth? Yes No 6. Based on what happens to the old continental lithosphere, is there any very, very old continental lithosphere remaining on Earth? Yes No 7. Label on the diagram where the oldest rock is at the surface. 8. Which statement correctly describes the relative age of continental and oceanic lithosphere? Continental rock is generally much older than oceanic rock. Oceanic rock is generally much older than continental rock. P. The oldest continental rock is approximately 4,000 million (4 billion) years old, while the oldest ocean rock is approximately 180 million years old. What happened to the ocean lithosphere that made up the ocean seafloor 4,000 million (4 billion) years ago?

Answer 1

THE AGE OF THE CRUST The cross section below shows the oceanic lithosphere (thinner, more dense) ond continental lithosphere (thicker, less dense). The ocean surfoce is indicated by a doshed line. Otdest rock Ridge Volacanic arc Trench Overriding plate Subducting plate 1. Label the divergent plate boundary and the convergent plate boundary. 2. What type of lithosphere is created new at the divergent plate boundarys bceanic lithosphere continental lithosphere 3. What happens to the old ocean lithosphere at the convergent plate boundary? t is pushed underneath the surface. It may change but stays at the surface. 4. What happens to the old continental lithosphere at the convergent plate boundary? It is pushed underneath the surface. lt may change but stays at the surface. 5. Based on what happens to the old ocean lithosphere, is there any very, very old ocean lithosphere remaining on Earth? Yes No 6. Based on what happens to the old continental lithosphere, is there any very, very old continental lithosphere remaining on Earth? Yes No 7. Label on the diagram where the oldest rock is at the surface. 8. Which statement correctly describes the relative age of continental and oceanic lithosphere? Continental rock is generally much older than oceanic rock. Oceanic rock is generally much older than continental rock. P. The oldest continental rock is approximately 4,000 million (4 billion) years old, while the oldest ocean rock is approximately 180 million years old. What happened to the ocean lithosphere that made up the ocean seafloor 4,000 million (4 billion) years ago?

1) The figure above is a collision between two convergent plates (one is oceanic plate and another is continental plate). The oceanic plate is thinner and dense whereas continental plate is thicker and low dense. Thus, the thinner and dense plates get subducted beneath the low dense and thicker continental plate (which is overriding).

2) Divergent plate boundary is on the oceanic plate as shown in figure above where two plates move apart from each other.

3) Old oceanic lithosphere gets subducted beneath continental plates.

4) Old continental plate may change but stays at the surface.

5) Very very old oceanic lithosphere does not exist, it gets subducted on the Asthenosphere.

6) Very very old continental lithosphere does exist on the Earth.

7, 8) Continental lithosphere is older than oceanic.

9) Very very old oceanic lithosphere (4 Billion years) does not exist, it gets subducted on the Asthenosphere.