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A Giant Sediment Trap in the Florida Keys

Key Largo Sinkhole Mineralogy Data

Depth Mineralogy
 mbsf   mbsl   Aragonite   Calcite   14C Age (years)

5 11.1 95 ± 5 5 ± 5 3,270 ± 60
6 12.1 95 ± 5 5 ± 5 *
7 13.1 95 ± 5 5 ± 5 *
8 14.1 95 ± 5 5 ± 5 *
9 15.1 95 ± 5 5 ± 5 *
10 16.1 95 ± 5 5 ± 5 3,640 ± 60
11 17.1 95 ± 5 5 ± 5 *
12 18.1 95 ± 5 5 ± 5 3,840 ± 70
13 19.1 95 ± 5 5 ± 5 *
14 20.1 95 ± 5 5 ± 5 *
15 21.1 95 ± 5 5 ± 5 4,060 ± 70
16 22.1 95 ± 5 5 ± 5 *
17 23.1 95 ± 5 5 ± 5 4,050 ± 70
18 24.1 95 ± 5 5 ± 5 *
19 25.1 95 ± 5 5 ± 5 *
20 26.1 95 ± 5 5 ± 5 4,220 ± 70
21 27.1 95 ± 5 5 ± 5 *
22 28.1 * * 4,630 ± 70
25 31.1 * * 4,820 ± 70
27 33.1 * * 4,760 ± 80
54.5+ 60.6+ 95 ± 5 5 ± 5 5,650 ± 90

* no samples sent for 14C age dating or run on the XRD.
+ sample from jet probe.

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U.S. Department of the Interior, U.S. Geological Survey, St. Petersburg Coastal and Marine Science Center
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Updated: 21 April, 1998@04:25:44 PM (THF)