Lithology

Hole depth/m

Thickness/m

Lithological description

Loess layer + gravel

13.5

13.5

Loess mixed with sand and gravel

sandy mudstone

17.5

4

Gray-yellow, with star-like muscovite, broken core, loose weathered, with iron interlayers

fine-grained sandstone

19

1.5

Gray-yellow feldspar quartz sandstone with dark minerals and horizontal bedding

sandy mudstone

23.5

4.5

Gray-yellow, with argillaceous inclusions, broken core

fine-grained sandstone

37

13.5

Gray-yellow feldspar quartz sandstone with dark minerals and horizontal bedding

sandy mudstone

41

4

Gray-yellow, with argillaceous inclusions, broken core

mudstone

46.5

5.5

Contains calcite filler

medium-grained sandstone

5 0

3.5

Main ingredient Quartz