Sandstone is a persistent stratigraphic unit.
海绿石砂岩是一个稳定的地层单元。
The glauconite sandstone is a persistent stratigraphic unit.
海绿石砂岩是一个稳定的地层单元。
The Precambrian stratigraphic unit has been found and mapped.
发现并填绘出前寒武纪地层单元。
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。
The Donghe Sandstone was broadly deposited in the early stage of the marine transgression, but it is not an isochronous stratigraphic unit.
东河砂岩是一套覆盖广泛的海侵初期的沉积产物，但不是一个等时沉积体，相当于晚泥盆世晚期至早石炭世早期沉积，具体沉积时间各地有差异。
It is the Guishan Formation of! the former Xinyang Group that is the strongly deformed pre-Devonian tectono-stratigraphic unit distributed in the main suture zone.
原信阳群龟山组就是沿主缝合带分布的前泥盆纪强应变构造地层体。
This paper deals with three factors, i. e. topographic unit, stratigraphic age, and strata association as the most important elements for controlling the soil engineering geological conditions.
本文以地貌单元、地层时代和地层组合作为控制土体工程地质条件的基本要素，并从八个方面实例论证了这三大要素对各类土体工程地质条件的宏观控制作用。
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。
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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