Seafloor Maps Reveal Underwater Caves, Slopes—and Fault Lines
Larry Mayer is headed out this week on a ship to explore the Channel Islands off the Southern California coast. Well, he’s actually exploring seafloor formations near the islands, looking for evidence that ancient peoples might have camped out in the caves as they migrated south some 15,000 years ago, a time when the sea level was 600 feet lower than today.