508 SIDNEY POWERS 
Coast region between Trujillo, Spanish Honduras, and Livingston, 
Guatemala (Fig. 1), forms the subject of the few notes on the 
geology which are here presented. The petrography of the igneous 
rocks collected in Honduras is described in an accompanying paper 
by Professor Wilbur G. Foye, of Middletown, Connecticut. 
Geologic investigations in the portion of Central America 
examined are conducted with difficulty owing to the primitive 
means of transportation inland beyond the coastal banana- 
plantation railroads and to the dense growth of tropical vegeta- 
tion. Satisfactory exposures are confined to stream valleys. Also 
a scarcity of fossils in pre-Tertiary strata makes correlation and 
age determination exceedingly difficult. In Honduras fossils of 
Triassic and Cretaceous ages have been described; in Guatemala 
strata of Carboniferous (probably Pennsylvanian or upper Missis- 
sippian), Cretaceous, Eocene (?), Oligocene, Pliocene, and Pleisto- 
cene ages are known." A lack of fossils and of detailed knowledge 
of the metamorphic rocks has made it impossible to determine 
whether they are in large part merely a metamorphosed portion 
of the Carboniferous or of an earlier Paleozoic system, as is suggested 
by the writer, or whether they are of pre-Cambrian age, as supposed 
by Sapper. 
GENERAL GEOLOGY 
Eastern Guatemala and northern Honduras lie on the south and 
southeast sides of the V-shaped Gulf of Honduras in latitudes 15° 
to 177 N. Commencing at the north the larger portion of the 
peninsula of Yucatan (Fig. 1), with the exception of the Cockscomb 
Mountains (an outlier of Paleozoic rocks in British Honduras), 
is composed of horizontal sediments of late Tertiary age which 
Honduras and Central America), ibid., Erginzungsheft 32, Heft 151, 1906; ‘‘Grund- 
ziige der physikalischen Geographie von Guatemala,” ibzd., Erginzungsheft 24, 
Heft 113, 1894-95; “Die Alta Verapaz”’ (Guatemala) (with geological map of part of 
Guatemala), Mitt. Geogr. Gesell. Hamburg, XVII (1901), 78-224; ‘‘La geografia 
fisica y la geologia de la peninsula de Yucatén”’ (Chiapas and Tabasco states only), 
Bol. Inst. geol. México, No. 3, 1896; A. Dollfus et E. de Mont-Serrat, Mission scien- 
lifique au Mexique et dans V Amerique Central, Géologie, Paris, 1868; E. Suess (de Mar- 
gerie), La Face de la terre, III (3) (1913), 1264-74. 
‘Bailey Willis, Index to the Stratigraphy of North America, U.S. Geol. Surv., 
Professional Paper No. 71, 1912. 
