 The large age difference (51 vs. 34 million years) between the submarine preshield stages and the post-shield rejuvenated stage seems to indicate that volcanoes in the chain can erupt again long after they are believed to be extinct.The volcano is known to have erupted intermediately in an underwater and shallow-water environment.Detroit Seamount has a wide (100,000 square kilometers) base and rises from the bottom of the abyssal plain to a depth of approximately ; in fact, it is as wide as Hawaii island at the head of the chain.