Lithology

Hole depth/m

Thickness/m

Lithological description

Loess layer + gravel

11.5

11.5

Loess mixed with gravel

sandy mudstone

22.1

10.6

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

fine-grained sandstone

35.5

13.4

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

sandy mudstone

39

3.5

Gray-yellow, with argillaceous inclusions, broken core

mudstone

44

5.0

Contains calcite filler

medium-grained sandstone

58.9

14.9

Main ingredient Quartz

sandy mudstone

60.9

2

grey, medium siltstone

mudstone

67.9

7.0

grey or light grey

fine-grained sandstone

70.4

2.5

grey with oblique bedding

mudstone

77

6.6

dark grey with wavy bedding