GROUND WATER IN NORTH-CENTRAL TENNESSEE

wash and weathered rocks in the lower parts of the dissected areas,
especially in the closely jointed oherty limestones of the Wejls Creek
Basin. Siome of these springs are perennial and constitute, reliable
sources of water for domestic purposes.
Most ed the ground waters of Stewart Coimty are moderately con-
centjeated and moderately hard cajcium bicarbonate waters $ueh as: those
whose analyses are tabulated on pages 110-111. Waters associated
with the Chattanooga shale in the vicinity of its outcrop, however, are
likely to l^e rather high in iron and to contain appreciable quantities of
hydrogen spulphide. Here, as in other parts of north-central Tennessee,
ground w»ter that occurs in the Mississippian limestone at mo4erate
depth may be rather high in noncarbonate hardness and may contain
considerable hydrogen sulphjde.