Home

Article Search

TABLE 1. Taxa used in Coexistence Approach analysis (CoA). C.Form= Citronelle Formation combined sites, H=HMR site, LS=Lamberts Station site, PP=Perdido Park site, RB=Red Bluff site, Sc=Scarborough site, Organs recognized per taxon: P=pollen, L=leaf, F=fruit, C=catkin.

Fossil taxa C.Form H LS PP RB Sc Organ
Acer rubrum X     X   X L
Acer saccharinum X         X L
Acer sp. X   X   X   PL
Alnus sp. X X X X X   P
Betula nigra X     X   X LF
Betula sp. X   X   X   PLF
Carpinus caroliniana X     X   X LFC
Carpinus sp. X   X   X   LFC
Carya aquatica X   X     X L
Carya sp. X X X X X X PLC
Castanea sp. X     X   X L
Chenopodiaceae X X         P
Clethra sp. X     X     L
Cornus sp. X       X   F
Crataegus sp. X     X   X L
Cyrilla racemiflora X X         F
Fagus sp. X   X X   X P
Fraxinus sp. X   X   X X PL
Gaylussacia sp. X         X L
Gordonia sp. X     X     L
Ilex sp. X X   X     PL
Juglans sp. X   X X X X P
Lindera sp. X     X     L
Liquidambar styraciflua X X   X X X PL
Liriodendron X X         PL
Liriodendron tulipifera X         X L
Magnolia sp. X X   X     PL
Myrica sp. X X X   X X PL
Nyssa aquatica X     X   X LF
Nyssa sp. X X X   X X PLF
Persea sp. X     X     L
Pinus sp. X X X X X X PL
Planera aquatica X X X     X LF
Platanus occidentalis X         X LF
Platanus sp. X     X X   PLF
Populus deltoides X         X L
Populus sp. X   X   X   PL
Ptelea trifoliata X     X     L
Pterocarya sp. X         X LF
Quercus falcata X     X   X L
Quercus nigra X         X L
Quercus virginiana X     X X X LF
Quercus sp. X X X X X X PLFC
Rhus sp. X X     X   P
Rubus sp. X   X       L
Salix sp. X X X X X X PL
Sassafras sp. X     X     L
Smilax sp. X   X       L
Taxodium distichum X X X X X X PLF
Trapa sp. X     X X X F
Ulmus sp. X X X X X X PL
Vaccinium sp. X         X L
Vitis rotundifolia X     X   X LF
Vitis sp. X X     X   PLF

TABLE 2. Taxa used in Bioclimatic Analysis/Mutual Climate Range Technique (BA/MCRT).

Acer rubrum Castanea sp. Liquidambar styraciflua Platanus occidentalis Quercus sp.
Acer saccharinum Clethra sp. Liriodendron Platanus sp. Rhus sp.
Acer sp . Cornus sp. Liriodendron tulipifera Populus deltoides Salix sp.
Alnus sp. Crataegus sp. Magnolia sp. Populus sp. Sassafras sp.
Betula nigra Cyrilla racemiflora Myrica sp. Ptelea trifoliate Taxodium distichum
Betula sp. Fagus sp. Nyssa aquatica Pterocarya sp. Ulmus sp.
Carpinus caroliniana Fraxinus sp. Nyssa sp. Quercus falcata Vaccinium sp.
Carya aquatica Gordonia sp. Persea sp. Quercus nigra  
Carya sp. Ilex sp. Planera aquatica Quercus virginiana  

TABLE 3. CLAMP scoring of Citronelle Formation sites.

Leaf character Scarborough site % Perdido Park site % Combined Sites %
Lobed 14 21 17
No teeth 36 47 48
Regular teeth 49 30 35
Close teeth 14 7 10
Round teeth 14 16 13
Acute teeth 52 37 40
Compound teeth 13 5 8
Nanophyll 0 0 0
Leptophyll I 3 0 2
Leptophyll II 7 8 8
Microphyll I 19 19 22
Microphyll II 36 59 45
Microphyll III 28 14 21
Mesophyll I 3 0 2
Mesophyll II 3 0 2
Mesophyll III 0 0 0
Emarginate Apex 0 0 0
Round Apex 20 16 14
Acute Apex 62 74 69
Attenuate Apex 18 10 17
Cordate Base 39 18 25
Round Base 9 8 11
Acute Base 52 74 64
L:W <1:1 14 1 7
L:W 1-2:1 48 47 47
L:W 2-3:1 28 45 38
L:W 3-4:1 10 4 7
L:W >4:1 0 3 2
Obovate 24 26 25
Elliptic 45 49 42
Ovate 32 25 32
Completeness 88 85 88

TABLE 4. Coexistence Approach analysis (CoA) results and modern value comparisons. MAP, PWTM, PRDM, PWMM results are in mm/year. C.Form= Citronelle Formation combined sites, H=HMR site, LS=Lamberts Station site, PP=Perdido Park site, RB=Red Bluff site, Sc=Scarborough site , Baton Rouge, Mobile, and Pensacola are modern sites. See text for details.

Site MAT °C CMMT °C WMMT °C MAP PWTM PDRM PWMM
C.Form 14.4-20.8 4.3-12.6 25.6-27.9 1122-1250 142-146 50-55 99-142
HMR 13.6-21.1 4.3-13.3 25.6-27.9 961-1355 109-195 50-55 99-176
LS 13.3-21.1 -0.1-12.6 25.6-27.9 897-1258 109-146 50-55 84-142
PP 14.4-21.1 3.7-13.3 25.6-28.1 1122-1355 142-192 43-61 142-177
RB 13.3-21.1 -0.1-12.6 25.6-27.9 897-1520 109-185 50-55 84-172
Sc 13.3-20.8 0.7-12.6 25.6-27.9 1003-1250 116-146 50-61 94-142
Baton Rouge 19.8 9.9 27.9 1547 170 89 170
Mobile 19.3 10.5 27.5 1684 183 83 166
Pensacola 19.8 10.3 27.8 1580 188 89 188

TABLE 5. Citronelle Formation taxa establishing Coexistence Approach analysis (CoA) interval boundaries.

  MAP1122
250 mm
PWTM 142
46 mm
PDRM 50
55 mm
PWMM 99
142 mm
Established Min-value Persea sp. Gordonia sp. Planera aquatica Gordonia sp.
Established Max-value Carya aquatica
Populus deltoides
Carya aquatica Carpinus sp. Carya aquatica
  MAT
14.4 - 20.8°C
CMMT
4.3 - 12.6°C
WMMT
25.6 - 27.9°C
Established Min-value Gordonia sp.
Persea sp.
Quercus. virginiana
Cyrilla racemiflora
Gordonia
sp.
Persea sp.
Persea sp.
Taxodium distichum
Quercus virginiana
Established Max-value Acer sacharinium
Vaccinium sp.
Carya aquatica Cyrilla racemiflora
Nyssa
sp.

TABLE 6. Coexistence Approach analysis (CoA), Bioclimatic Analysis/Mutual Climate Range Technique (BA/MCRT), Leaf Margin Analysis (LMA) results comparisons.

Method MATºC WMMTºC
July MT
CMMTºC
Jan MT
MAP mm PWMM mm
July MP
PDRM mm
Jan MP
CoA 14.4 - 20.8 25.6 - 27.9 4.3 - 12.6 1122 - 1250 99 - 142 50 - 55
BA/MCRT 18 27 5-7.4 1190 - 1325 125 85 - 105
LMA 19.3 +/- 2.6          
Current Mobile, AL 19.3 27.5 10.5 1684 166 83

TABLE 7. CLAMP results and modern value comparisons. GRIDMet3brAZ climate values from CLAMP website (clamp.ibcas.ac.cn/ Clampset2.html). GSP (growing season precipitation) is in mm. LGS (length of growing season) is in months. Sc = Scarborough site, PP = Perdido Park, C. Form = Combined Citronelle Formation sites. a = Modern values from NOAA Climatography of the United States No. 81 (01 Alabama). b = Removed three coldest months (period between first freeze of season to last freeze of season) according to NOAA for adjusted LGS and GSP.

Site MAT C°; 2SD WMMT C°; 2SD CMMT C° 2SD LGS; 2SD GSP; 1SD
Sc 11.8; 9.5 - 14.1 23.1 1.5; -2.3 - 5.3 7.0; 5.6 - 8.4 728; 527 - 929
PP 13.9; 11.6 - 16.2 22.8 5.6; 1.8 - 9.4 7.9; 6.5 - 9.3 1055; 854 - 1256
C.Form. 13.4; 11.1 - 15.7 23.3 4.3; 0.5 - 8.1 7.7; 6.3 - 9.1 946; 745 - 1147
Mobile, AL a 19.3 27.5 10.1 12 1683
Mobile, AL b       9 1289

logo smallPalaeontologia Electronica
Webmaster
1998–2019
22 years of electronic palaeontology

PE is archived by CLOCKSS and LOCKSS programs.