Explanation:

Post-drift studies provided considerable information that was not available at the time Alfred Wegener put forth his concept of continental drift. Particularly, the mapping of the ocean floor and paleomagnetic studies of rocks from oceanic regions revealed the following facts:- Statement 1 is incorrect: All along the midoceanic ridges, volcanic eruptions are common, and they bring vast amounts of lava to the surface in this area. Statement 2 is incorrect: The oceanic crust rocks are much younger than the continental rocks. The age of rocks in the oceanic crust is nowhere more than 200 million years old. Some of the continental rock formations are as old as 3,200 million years. Statement 3 is correct: Recent research has established that the sediments on the ocean floor are unexpectedly thin. Before this, scientists had hypothesised that ocean floors should have a complete sequence of sediments of much longer duration. However, nowhere was the sediment column found to be older than 200 million years