GS ape JUL 1 8 1967 
2-,BOTANICAL MUSEUM LEAFLETS 
HARVARD UNIVERSITY 
VoL. 21, No. 10 
CaMBRIDGE, Massacuuserrs, JuLyY 19, 1967 
MANGROVE POLLEN AT THE 
DEPOSITIONAL SITE OF OLIGO-MIOCENE 
AMBER FROM CHIAPAS, MEXICO’ 
BY 
JEAN H. LanGENHEIM, Betry L. HackNneErR anv 
ALEXANDRA BARTLETT’ 
AMBER from the New World tropics has been reported 
to occur in Mexico, Colombia, Brazil, Argentina, Haiti 
and the Dominican Republic (Langenheim, 1964). 
Neither the amber itself nor the environment of its de- 
position in any of these localities, however, has pre- 
viously been studied in detail. 
‘Grateful acknowledgment is expressed to Prof. J. Wyatt Durham 
and Prof. E.S. Barghoorn for continued interest and help with the 
project as well as criticism of the manuscript. The critical comments 
of Prof. A.O. Dahland Dr. Lucy Cranwell Smith are also appreciated. 
The investigation was supported in part by National Science Foun- 
dation grants GB 1312 and 2397, and the Radcliffe Institute for In- 
dependent Study. 
* The senior author was a Research Associate in the Botanical Mu- 
seum, now at the University of California at Santa Cruz. Miss Hack- 
ner, now at the University of Pennsylvania, investigated the mangrove 
and associated fossil pollen in the Chiapas amber-bearing sediments 
for a Senior Thesis at Radcliffe College under the supervision of Dr. 
Langenheim. Miss Hackner gratefully acknowledges support of this 
study by an National Science Foundation Undergraduate Research 
Participation grant. Dr. Bartlett, Harvard University, made a special 
study of modern Rhizophora and other tropical pollen in connection 
with this project and with her present studies of Late and Post-Glacial 
history of Gatun Basin, Panama. She wishes to express appreciation 
to the American Chemical Society, PRF Grant 94.7-A-2, for assistance 
in this study. 
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