Principle of original horizontality, principle of superposition, principle of lateral continuity, principle of crosscutting relationship and unconformity.
There was something in its oppressive horizontality which too much reminded him of the arena of life; it gave him a sense of bare equality with, and no superiority to, a single living thing under the sun.
层水平
、叠
的
起人生的角斗场；令他感
，任何生物之间都是完全平等的，谁也不比谁差。
