张家沟剖面沉积连续、暴露完全、化石极为丰富，是建立侏罗白垩系临界阶陆相层型和研究界线划分的理想剖面。
So the Zhangjiagou section is an ideal candidate section for erecting the terrestrial stratotype and studying the Jurassic-Cretaceous boundary in China.
下侏罗统含煤系是铀矿化赋存的有利部位。
Uranium mineralizations are hosted in the Middle-Lower Jurassic coal-bearing series.
西北地区中、下侏罗统煤层广布，厚度较大；
The Middle and Lower Jurassic with thick coal seam is widely distributed in Northwest China.
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