How can fossils found in high mountains be explained? For 20 points pls answer clearly! :D

Scientists have found fossils of whales and other marine animals in mountain sediments in the Andes, indicating that the South American mountain chain rose very rapidly from the sea. ... But since then, the violent upthrusting of the Andean chain has carried the sediments to the tops of mountains.Explanation:ok

i do believe that its called,(the segovia highlands); plz check first good luck;