236 THE FLORIDA ANTHROPOLOGIST 2006 VoL. 59(3-4)

peer et t P  EP R  e

1000

 

2
2 100
°°
<=
Oo
G
= oO. Tenerife
~ 10
“ e Grenada
@ Custom House
mM Wynnhaven
1
Rb Ba Th U K Nb Ta La Ce Sr Nd P Sm Zr Hf Ti Th Y Tm Yb
1000
&
5 100
Cc
oO
can
o
fo
a
5
” @ Custom House
10
M@ = Wynnhaven
O Tuxtia
© Toxtlacuaya
1

 

Rb Ba Th U K Nb Ta La Ce S Nd P Sm Zr Hf Ti Tb Y Tm Yb
r

Figure 16. Trace element concentrations of mafic pumice and scoria samples from Florida archaeological sites normalized
to the composition of chondritic meteorites (Thompson 1982). Element are plotted from left to right in order of increasing
compatibility in small fraction melt of the mantle (Rollinson 1993). a) samples of Florida mafic pumice plotted relative to mafic
scoria sample (DH97-7) from the Diego Hernandez Formation, Las Cafiadas, Tenerife ( Wolff et al. 2000) and alkaline basalt
(GDA-014) from Grenada in the Lesser Antilles (Turner et al. 1996); b) samples of Florida mafic pumice plotted relative to
alkaline mafic rocks for eastern Mexico — “evolved” basalt sample (216) from the Tuxtla Volcanic Field (Nelson et al. 1995)
and alkaline basalt sample (CP-48b) from the Toxlacuaya flow, located 10 km north of Xalapa, Mexico (Siebert and Carrasco-
Niiiez 2002).