Hydrochemical Characteristics and Formation Mechanism of Strontium-Rich Groundwater in Shijiazhuang, North China Plain

Figure 9

A geological sketch of the upstream region of the Hutuo River: (1) Quaternary system; (2) Permian system; (3) the carboniferous; (4) Cambrian Ordovician; (5) upper Paleozoic erathem; (6) lower Paleozoic erathem; (7) the Wutai group of the archaic kingdom; (8) Fuping group of the ancient kingdom; (9) basin boundary; (10) provincial boundary; (11) the rivers; and (12) stratigraphic boundary.