Former New Mexico Tech graduate student Mic Heynekamp mapped the distribution of calcite cement zones, elongated concretions, and deformational styles along the exhumed Sand Hill fault, which cuts poorly consolidated clastic sediments along the western margin of the Albuquerque Basin. The elongated concretions, which range from nearly vertical in the fault zone to horizontal in adjacent paleo aquifer units, are inferred to represent paleo groundwater flow directions through the fault zone
(see P.S. Mozley and L.B. Goodwin, 1995, Geology 23, 539-542).