Answer
The plate tectonics theory helps explain the existence of fossil marine life in rocks atop compressional mountains through the process of subduction and uplift. When tectonic plates converge and one plate is subducted beneath another, marine sediments and fossils from the ocean floor get thrust upwards along with the overriding plate. As the rocks are uplifted and exposed at the surface due to tectonic forces, the fossils preserved in the marine sediments become visible in the rocks atop the mountains.
These marine fossils found in rocks atop compressional mountains provide evidence of ancient ocean environments that existed before the tectonic collision and uplift occurred. This phenomenon has been observed in many mountain ranges around the world, and it supports the idea that the Earth's lithospheric plates have been moving and interacting over geological time scales.
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