Rocksprings Quad

Texas Water Development Board

Located in Edwards County, Texas, this groundwater monitoring location is associated with a water well in the Edwards-Trinity aquifer system.

Well Construction

Depth Description
0.0-150.0 ft steel casing
Depth Lithology Description
0.0-10.0 ft - Buda LS caps higher divides in area (hard & dense)
10.0-15.0 ft - Del Rio shale or marl-yellow in color: good sorting on high divides
15.0-25.0 ft - Top of Georgetown
25.0-510.0 ft - Edwards section usually about 485 ft thick. Numerous zones of brown-black or blue chert on flint in nodular form: occassionally bedded. This section contains numerous zones of cavernous LS. The LS thr
25.0-510.0 ft - The LS throughout this section is of medium to coarse crystalline structure. Several fair to good water horizons should be present in this section.
25.0-510.0 ft - Water could flow through the primary pore spaces ina sheet like manner or through the secondary or cavernous openings in a stream like manner. Both conditions probably exist.
510.0-560.0 ft - Apparent top of Comanche Peak section.This section usually consists of nodular,somewhat marly fine crystalline LS on the outcrop.Several good springs on the Nueces & Frio Rivers flow from this zone
560.0-563.0 ft - Top of blue mud or Glenrose shale formation

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