Karst-pitted limestone (epikarst) on a collapse hole wall at Garden Cave, located near the hilltop south of Reckley Hill Pond & north of the eastern end of Crescent Pond, northeastern San Salvador Island, eastern Bahamas.

Garden Cave is hosted in a lithified sand dune ridge composed of aragonitic calcarenite limestones of the Owl's Hole Formation (Middle Pleistocene). This cave is a partially collapsed flank margin cave. Flank margin caves form at the flanks of carbonate islands and at the margins of fresh-groundwater lenses. As such, flank margin caves are phreatic features. In the vicinity of the seawater-freshwater mixing zone (halocline) of a groundwater lens (see diagram - www.carbonatecreek.com/caves/images/carbisland.gif), relatively rapid dissolution of limestone occurs due to the high aggressivity of the water. Limestone dissolution at Garden Cave occurred during the Middle Pleistocene and/or Late Pleistocene.