3D-Geology
位置:40.427182°N,116.850788°E地层:蓟县系洪水庄组描述:可观察到黑色页岩,见黄铁矿和菱铁矿结核,厚度亦较大,宽城一带厚达129 m;宣化、易县一带薄层砂岩和粉砂岩增多,可见大量硅质和铁质结核。
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BJMY-MB04 by Dixuezha on Sketchfab