Keywords: St. Croix geologic map.png en St Croix geologic map where Km is the Cretaceous Mt Eagle Group Kd is Cretaceous diorite Kg is Cretaceous gabbro Tbf is the Pliocene Blessing Formation Tmb and Tlr are the Miocene Kingshall Limestone Qab is Quaternary alluvium and Qr is Quaternary reef 0001-01-20 Geology and Hydrogeology of the Caribbean Islands Aquifer System of the Commonwealth of Puerto Rico and the U S Virgin Islands USGS Professional Paper 1419 R A Renken W C Ward I P Gill F Gomez-Gomez J Rodriguez-Martinez other versions PD-USGov United States Virgin Islands in the 2000s Geological maps of the United States St Croix |