Assertion: karst aquifer | /r/HasProperty | sid jones
Facets:
Source sentences:
text: Dissolution openings and active karst development may extend to depths of 180 m or deeper in the Valley and Ridge, compared to 30 m in the outer Central Basin, because karst aquifers and confining units are not horizontal (Hollyday and Hileman, in press; Sid Jones, Tennessee Department of Environment and Conservation, oral commun., 1997).