His owner thought it might have been a rock or petrified wood.

他的主人认为可能是有岩石或木化石。

Many of the homes are made from wood, rock, and mud, which made them fall easily when the ground started shaking.

许多房屋是用木头、岩石和泥土建造的，这使得它们在地面开始震动时很容易倒塌。