Post on 18-Jan-2018
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PROGRESS ON “STRUCTURAL CONTROLS ON THE EDWARDS/TRINITY AQUIFER INTERFACE, CAMP
BULLIS QUADRANGLE, TEXAS”
Presented byDavid A. Ferrill
Contributors: Darrell Sims, Deborah Waiting, Alan Morris, Alvin Schultz, Allan Clark
Southwest Research Institute®
Center for Nuclear Waste Regulatory Analyses
February 2003
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OVERVIEW
3D Geologic Framework Modeling - Castle Hills Quadrangle (completed during previous project)
3D Geologic Framework Modeling - Camp Bullis Quadrangle
Field work to characterize faults in Glen Rose Limestone
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CASTLE HILLS QUADRANGLE 3D MODEL AREA
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CAMP BULLIS QUADRANGLE
Digital terrain model
Well data(43 wells)
Geologic mapping – faults– outcrop
geology– structure
contours
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CAMP BULLIS QUADRANGLE
Model horizons– Kainer Formation– Upper Glen Rose– Lower Glen Rose– Bexar Shale– Cow Creek– Pine Island Shale– Sligo Limestone
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FIELD WORK TO CHARACTERZIE FAULTS IN GLEN ROSE LIMESTONE
Ralph Fair Road
State Route 46
Highway 281 & H.L. Chapman Pipeline Construction Company
Canyon Lake Spillway
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H.L. CHAPMAN PIPELINE CONSTRUCTION COMPANY
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H.L. CHAPMAN PIPELINE CONSTRUCTION COMPANY
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CANYON LAKE SPILLWAY GORGE
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FAULTS IN CANYON LAKE SPILLWAY GORGE
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FAULT ZONE IN CANYON LAKE SPILLWAY GORGE
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FAULT ZONE IN CANYON LAKE SPILLWAY GORGE
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OBSERVATIONS TO DATE
Faults in Glen Rose typically less steep that faults in Edwards Group
Important stratal (limestone and shale) control on fault propagation in more shale-rich section
More common occurrence of shale layers in Glen Rose present barriers to vertical flow along faults, and enhances lateral flow along faults