Table 1 Marker layers of the study area.
S. No | Marker layer | Geologic period | Depth (m) | Description |
|---|---|---|---|---|
1 | Loess | Q3 | 0‒45 | 1‒2 layers of red clay occurring at the bottom |
2 | Conglomerate | E | 5‒8 | Occurring locally |
3 | Sandstone (K8) | P1x | 6.80 | Large erosion areas found in the valley |
4 | No. 2 coal seam | P1s | 3.81 | Large erosion areas in the valley |
5 | Sandstone (K7) | 2.5‒7.0 | Continuous distribution | |
6 | Mudstone (K5‒K7) | C3t | 10‒15 | Gradually thickening northward |
7 | Sandstone (K5) | 3.8 | Occurring only in the northern part | |
8 | Limestone (K4) | 4.3 | Continuous distribution | |
9 | Limestone (K3) | 5.2 | Continuous distribution | |
10 | Limestone and sandstone (K2) | 6.0 | Continuous distribution | |
11 | No. 10 coal seam | 2.61 | Continuous distribution | |
12 | Sandstone (K1) | 2.40 | Continuous distribution | |
13 | Bauxitic mudstone | C2b | 25 | Mudstone and bauxitic mudstone, with Shanxi-style iron ore |
14 | Limestone | O2f. | Â | Interbedded with mudstone and quartz sandstone |
