Table 2. Geological map of the survey target site.

Era		Stratum division			Mark	Geological properties
Cenozoic	Quaternary	alluvium			Qa	soil, sand, gravel
			∼∼∼ unconformity ∼∼∼
Mesozoic era	Cretaceous	Gyeongsanggye	Nakdongtong	Chilgok Layer	Knc	purple sandy shale, shale, Green gray sandy shale, conglomerate
				jinju Layer	Knj	Light gray to grayish green alkosite, sandy shale, black shale
				Madong Layer	Knm	Light gray alkous sandstone, green gray to gray sandy shale, purple sandy shale, shale
				Wonji Layer	Knw	Limestone Tool Shale, Alcosite Sandstone