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Question
tina is hiking up table mountain. the rocks layers are bent and folded, and she finds a shell. which best describes what most likely happened here millions of years ago? (1 point) two plates collided to form a transform plate boundary two plates collided to form a convergent plate boundary two plates collided to form a divergent plate boundary two plates collided to form a subduction boundary
Brief Explanations
- Convergent plate boundaries involve plates colliding. This can cause rock layers to bend and fold (due to compressional forces).
- The presence of a shell (a marine fossil) suggests that the area was once underwater. Convergent boundaries can uplift land (e.g., mountain - building), bringing areas that were once submerged (where shells would be) to higher elevations.
- Transform plate boundaries involve sliding past each other (no significant folding or uplift of marine - related features like shells in the context of mountain - like features).
- Divergent plate boundaries involve plates moving apart (more associated with seafloor spreading, rift valleys, not the folding of rock layers and uplift of marine fossils to a mountainous area).
- Subduction boundaries (a type of convergent boundary) are more focused on one plate going under another. While subduction is part of convergent boundaries, the general "convergent plate boundary" better encompasses the folding of rock layers (mountain - building) and the presence of a marine fossil (due to uplift) in this context.
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Two plates collided to form a convergent plate boundary