She explains that these are rock layers piled one on top of another. Under the surface of the earth, under high temperatures and high pressure, because the hardness is variable, they become twisted and uneven. The light color is sandstone, while the deep color is shale.
她解釋，這是水平沉積的岩層，在地表下經高溫、高壓後，岩性因軟硬不同而呈彎曲狀，淺色的是砂岩、深色是頁岩。