Report
Geology and hydrology of the Edwards Aquifer in the San Antonio area, Texas
Maclay, R.W.
Record Number:
5966
Year:
1995
Journal:
U.S. GEOLOGICAL SURVEY Water-Resources Investigations Report 95-4186
Pages:
72 pages
Abstract:
Flowing wells that discharge more than 10,000
gal/min have been drilled in the city of San Antonio. In
Bexar County, live, blind catfish have been netted from
the water discharging from flowing wells with depths
of approximately 1,500 ft (Longley, 1981, p. 1-15).
These wells are located near the transition zone
between the freshwater and saline-water zones of the
aquifer at distances of more than 15 mi from the unconfined
part of the aquifer. The presence of the catfish at
these wells indicates that interconnected cavernous
openings exist at great depths in the aquifer. These cavernous
openings might be associated with segments of
valley systems of a paleokarst developed during Cretaceous
time on the uplifted San Marcos arch or could be
the result of in situ dissolution near the transition zone.
Times Cited:
2