Yet John Underhill of Edinburgh University has found evidence that the isthmus is full of landslide rubble, which could have tumbled into a narrow sea channel during an earthquake.

然而，爱丁堡大学的约翰·安德希尔发现证据显示这个地峡布满了山崩后的砾石，它们可以在发生地震时滚落到一个狭窄的海峡里。