. Bulletins of American paleontology. Hydrology. Vegetation, and Climate: Winkler et al. 67 a. o A06 Charcoal as °o organic weight ( 10 20 30 40 5 0-7- !> 7-14- T 14-20- l*- 20-25- & 25-32- d 32-39- Cl >, 39-45- i: 45-50- ^^ ,. > 50-57- rr^*'' J âºâ¢ 1960 -fZ-.^O 60 5-64- â¡ fc 64-70- V â â â *' 1 70-75- D âºâ 21(MI -I-/-3II 1 1 1 1 VBl' 10 20 30 40 50 A23 Charcoal as % organic weight 0 20 40 60 80 100. ^ *â âIâ 40 LlHd *l- 70 VBl' 1660 +/-10fl VBP 1890 -t^/- 70 VBP 2600 +/- 70 VBP 2S-I(I +/- 70 VBP (I +/- 60 VHP 2S40 +/- 70 VBP Charcoal as % dry weight Charcoal
. Bulletins of American paleontology. Hydrology. Vegetation, and Climate: Winkler et al. 67 a. o A06 Charcoal as °o organic weight ( 10 20 30 40 5 0-7- !> 7-14- T 14-20- l*- 20-25- & 25-32- d 32-39- Cl >, 39-45- i: 45-50- ^^ ,. > 50-57- rr^*'' J âºâ¢ 1960 -fZ-.^O 60 5-64- â¡ fc 64-70- V â â â *' 1 70-75- D âºâ 21(MI -I-/-3II 1 1 1 1 VBl' 10 20 30 40 50 A23 Charcoal as % organic weight 0 20 40 60 80 100. ^ *â âIâ 40 LlHd *l- 70 VBl' 1660 +/-10fl VBP 1890 -t^/- 70 VBP 2600 +/- 70 VBP 2S-I(I +/- 70 VBP (I +/- 60 VHP 2S40 +/- 70 VBP Charcoal as % dry weight Charcoal as % dry weight -°â Charcoal as % dry weight *â Charcoal as % organic weight Text-figure 4.âCharcoal analyses of A06 and A23 presented as percent dry weight and as percent organic weight. Gator Lake Charcoal Percent Charcoal c 20 40 60 80 100 1 2-2 5 11 7-12 7 20 a-22 0 ^^^^^^Bl ^ 31 3-32 3 â 41 0-42 0 51 2-52 2 ^ i^H E 3 61 2-62 2 ^H C a 71 3-72 3 167-169 267-268 367-368 ^H 1 â 467-468 567-568 667-668 1 I Text-figure 5.âPercent charcoal in Gator Lake sediments record in any single Everglades peat deposit. Much of the dark organic matter in some cores is charcoal (A23. Text-fig. 4) and even in peat sections which ap- pear to be continuous, hiatuses occur These findings dramatically underscore one of our conclusions: dating at close intervals is critical to understanding Ever- glades development. Charcoal analysis of contiguous samples from cores at A06 and A23 (Text-fig. 4) showed that wildfires have been an agent of change on the Everglades land- scape for at least the last few millennia. High charcoal abundances are noted after about 1600 yr B. P. at both sites when drier plant communities are evident from the pollen assemblages. In diatom slides abundant charcoal was noted throughout 70-45 cm at the A06 site and from 33-12 cm and again in the 9-5 cm sam- ple interval at A23. Charcoal analysis of the Gator Lake sediments shows higher charcoal abundan
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