rock-stratigraphic unit 岩石地层单位
polarity rock-stratigraphic unit 极性岩石地层单位
structural rock stratigraphic unit 构造岩石地层单位
Geologic time unit, rock stratigraphic units and time stratigraphic unit.
地质年代单位、岩石地层单位、年代地层单位。
Commonly, the isopachs, or contours that make up an isopach map, display the stratigraphic thickness of a rock unit as opposed to the true vertical thickness.
通常由等厚线(或等值线)构成等厚图，展示岩石单位的(与真垂直厚度相对的)地层厚度。
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