Fractures can increase flow greatly in aquifers

FRACTURE CONVERGENCE

Edwards Aquifer Area Cross-Section EDWARDS PLATEAU HILL COUNTRY GULF COASTAL PLAIN Edwards T r i n t y G o u p E d w a d s T r i n t y Balcones fault zone G o u p Groups Midway Group D e l R C a , B E g F A Trinity Group Edwards Group a n d N v r o G u p s Catchment area E w T i t y L m e , Wilcox and Claiborne H S h l A B Group Recharge Zone Artesian Zone G r o u p Edwards Aquifer Area Cross-Section

KARST OVERVIEW In the subsurface these conduits feed into each other; dendritic patterns common Larger conduits formed Large volumes of water transmitted with high flow velocities

Veracruz, Mexico