Geologic and hydrologic data collected at test holes NC-6 and NC-11, Hatillo and Isabela, northwestern Puerto Rico
Open-File Report
93-465
By: Jesús Rodríguez-Martínez and John L. Hartley
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Abstract
Test holes NC-6 and NC-11 were drilled in the municipalities of Hatillo and Isabela, respectively, as part of a study of the aquifers in the Northern Coastal Province of Puerto Rico. Test holes NC-6 and NC-11 were drilled to depths of 2,574 and 2,120 feet below land surface, respectively. Geologic and hydrologic data collected during drilling included continuous core, water-quality samples, water-level measurements, and estimates of aquifer yields from the water-bearing zones. Test hole NC-6 penetrated five formations ranging in age from late Oligocene to early Pliocene: the Lares Limestone, the Cibao Formation, the Los Puertos Formation, the Aymamon Limestone, and the Quebradillas Limestone. This test hole also penetrated a water-table aquifer and six artesian aquifer. Test hole NC-11 penetrated four formations ranging in age from late 01igocene to middle Miocene: the San Sebastian Formation, the Cibao Formation, the Los Puertos, and the Aymamon Limestone. A water-table aquifer and four artesian aquifers were penetrated by this well.
| Publication type | Report |
|---|---|
| Publication Subtype | USGS Numbered Series |
| Title | Geologic and hydrologic data collected at test holes NC-6 and NC-11, Hatillo and Isabela, northwestern Puerto Rico |
| Series title | Open-File Report |
| Series number | 93-465 |
| DOI | 10.3133/ofr93465 |
| Edition | - |
| Year Published | 1994 |
| Language | ENGLISH |
| Publisher | U.S. Geological Survey ; USGS Earth Science Information Center, Open-File Reports Section [distributor], |
| Description | iv, 39 p. :ill., maps ;28 cm. |
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