Filters: Contacts: Mary E. Lupo (X)
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This data release contains photographs and photomicrographs from drill cores and cuttings of pre-Middle Jurassic basement rocks that are buried beneath Coastal Plain sedimentary deposits in Florida. These samples provide rare insights into deeply buried rocks that have no surface exposures and no known exposed correlates. These images were acquired to support the characterization, discrimination, and correlation of map units comprising Florida’s basement infrastructure (Deasy and others, 2024a). These are the original images. Annotated images with additional comments are available in the companion Data Report (Deasy and others, 2024b). Semi-quantitative mineral modes of many basement rocks are presented in a companion...
This data release reports the mineral abundances in samples of pre-Middle Jurassic basement rocks from twenty-nine (29) boreholes in Florida and southern Alabama. Mineral abundances are quantified from whole-rock powder X-ray diffraction (XRD) data and the Rietveld method and are reported in weight percent or, where present near the detection limit (~1 wt.% depending on mineral), as trace (t). The abundances of expandable clays are given in weight percent in corundum-spiked samples and qualitatively in EG-solvated samples as absent (0), trace (t), present (p), or abundant (a). Accessory minerals identified by optical and/or electron microscopy but not detected in XRD patterns are named but not quantified. Major...
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