Geology and ground-water resources of Comal County, Texas

Abstract

PagfrTABLE 10. Gaging stations in the Comal County area, Texas_________ 11. Runoff of the Guadalupe River.________-______'___________ 12. Discharge of the Guadalupe River near Spring Branch and at New Braunfels and pickup between stations; rainfall at Fischer Store and New Braunfels, Tex., 1928-50-.-_.___ 13. Discharge measurements, Hueco Springs, 3 miles north of New Braunfels, Tex_.._____________________________ 14. Discharge measurements to determine seepage on the Guadalupe River from Comfort, Tex., to New Braunfels, Tex., in January 1928____________-________-_---__---_--____ 15. Discharge measurements to determine seepage on the Guadalupe River from Comfort, Tex., to New Braunfels, Tex., in February 1929____________-___-___-__----_--__---_-_ 16. Discharge measurements to determine seepage on the Guadalupe River from Spring Branch, Tex., to New Braunfels, Tex., in August 1944__________________________________ 17. Average monthly and annual discharge, in second-feet, of Comal Springs at New Braunfels, Tex___________________ 18. Rainfall and runoff, Comal County, Tex., 1946-50__________ 19. Partial analyses of water from wells and springs in Comal County, Tex_____________________________ Travis Peak formation._____________________________ Glen Rose limestone (lower member)__________________ Glen Rose limestone (upper member

Geologic framework and hydrostratigraphy of the Edwards and Trinity aquifers within northern Medina County, Texas

“…1), which is the result of late Oligocene and early Miocene extensional faulting (Weeks, 1945a, b;others, 2000, 2011;Rose, 2016Rose, , 2017 and fracturing resulting from the eastern Edwards Plateau uplift (Rose, 2017). In the Balcones fault zone, most of the faults in the study area are high-angle to vertical, en echelon, normal faults that are predominately downthrown to the southeast (George, 1952) (fig. 7).…”

“…The Georgetown Formation of the Washita Group has been extensively described in the literature both as part of the Edwards aquifer and as part of the upper confining unit to the Edwards aquifer (George, 1952;Maclay and Small, 1976;Stein and Ozuna, 1995;Clark and others, 2016b). This traditional manner of describing the Georgetown Formation of the Washita Group as both a confining unit and part of the Edwards aquifer is continued in this report.…”