穿过有大面积中生界和第三系地层出露地区的河流，其含沙量高，侵蚀模数大。
The rivers running across large area with emergence of Mesozoic and tertiary stratum usually have high sediment concentration and large modulus of erosion.
中生代晚期地温梯度高，是古生界碳酸盐岩及煤系地层的主要生气期和运移期。
The Late Mesozoic characterized by higher temperature gradient is main period of gas generation and migration of Paleozoic coal series and carbonates.
研究区内出露的地层以太古界——元古界胶南群的各类变质岩和中生界白垩系各类碎屑岩和火山岩为主。
In the research area, the primary surface formation are the Archeozoic - Proterozoic Jiaonan group there are kinds of Clastic rocks and Volcanic rocks in the metamorphite and Mesozoic Cretaceous.
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