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Figure 2.

(A) Airborne eTh over the 2019 survey area and approximate heavy mineral percentages (circles) from visual observations of auger samples (see text footnote 1, item S2); green box shows area used for statistical calculations (D and E); yellow boxes show locations of close-ups in Figure 3. Gray dashed lines show the location of a buried paleochannel. (B–C) Airborne eTh for sands only (B) and clays/muds only (C). (D) Mean and (E) skewness values of eTh (parts per million [ppm]) for the various geologic units. H—Holocene; SB—Silver Bluff Beds; Wd—Wando; TM—Ten Mile Hill; Ld—Ladson; P—Penholoway; W—Waccamaw.

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