underlying rock的意思|示意

The resulting composite is the most detailed and accurate portrait of the US land surface and the ages of its underlying rock formations yet displayed in the same image.

整和之后，可以从一张图片上得到详细和准确的美国大陆图和大陆下面岩石形成的年代。

But the glacier is now receding, so a draft agreement has been proposed to create a new border that coincides with the ridge of the underlying rock.

然而，如今的冰川正一点点退去，因此一份协议草案摆了上来，提出以地下岩石山脊为新界限。

The location and extent of aquifers is dependent upon the geological conditions of the underlying rock.

含水层的位置和范围是根据下垫岩石的地质条件所决定的。