is Opaque, varying in color from beige to molasses to 
almost black. More variation occurred in the spectra from 
these few pieces than is frequently the case where a larger 
number of samples have been run, i.e., from Chiapas, 
Mexico and Alaska. Three spectra showing this variation 
are presented in Plate XXII. Type I (H 45) and Type 
II (H 820) are similar, but Type III differs in having 
a broader and more intense absorption band between 
9-10 (1110-1000 cm-!). This may be due to inclusions 
of siliceous material. Type III was taken from a light 
beige portion of a banded specimen of which Type II 
represents the darker portions. As indicated with the 
Roebling, N.J. amber, more heterogeneity must be ex- 
pected in the opaque amber types than in the trans- 
parent ones. 
Earty TerriAry AMBER 
Amber is reported to occur in strata from early ‘Terti- 
ary time(Kocene to Miocene) in various areas throughout 
North and South America. A fairly extensive deposit 
has been discovered in Chiapas, Mexico, and is being 
intensively investigated by geologists, entomologists and 
botanists. Thus, the Chiapas deposit can serve as a useful 
standard for comparison of other Tertiary ambers as the 
Alaskan deposit does for Cretaceous ambers. Small 
amounts of Eo-Oligocene amber occur near Seattle, 
Washington; amber of probable Oligocene age occurs 
in the Dominican Republic and of Miocene age in Para, 
Brazil. The age of amber from several other localities 
probably is early Tertiary, but stratigraphic data are 
lacking. 
Chiapas Amber 
Amber from Chiapas, the southernmost state in Mex- 
ico, has been reported in mineralogical studies (Helm, 
1891; Kunz, 1903; Tschirch, 1906; Hintze, 19338; 
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