we oe 
APR. 4, 1923 WOODRING: GEOLOGY OF HAITI 123 
barnacles, decapod Crustacea, fish, birds, mammals, and plants. The 
largest number of collections are from Eocene and Miocene rocks, 
which are the most widely distributed. Unusually interesting col- 
lections of extinct Quaternary mammals and birds were obtained from 
caves near St.-Michel de l’Atalaye. In addition to remains of ground 
sloths and rodents, parts of a huge barn owl were found. This owl 
must have been a very powerful bird and apparently was the marauder 
responsible for the numerous remains of rodents found in the caves. 
Accounts of these remains have been published.®> Further exploration 
of these and other caves should reveal a large Pleistocene fauna. 
A paper describing the fossil plants collected, all of which are of 
Miocene age, is also in press;® another paper describes Miocene fish 
remains.’ 
Igneous rocks—Most of the igneous rocks are older than the sedi- 
mentary rocks and crop out on the crests of anticlinal arches in the 
mountains or in deep valleys where streams have cut through the 
cover of sedimentary rocks. 
The oldest known igneous rocks are principally basalts that cover 
large areas in the northern part of the Republic. They are intruded 
by pyroxenites, peridotites, and diabases. These early igneous rocks 
are generally much altered and metamorphosed. Pyroxene and 
hornblende andesites and dacites in the same region are somewhat 
younger. Eruptions of basaltic rocks followed the andesites in some 
localities. There are minor amounts of tufaceous and agglomeratic 
rocks associated with the lava flows. All these volcanic rocks are 
the result of intense and long continued vulcanism in probably early 
and middle Mesozoic time. 
The widely distributed basalts of the southern part of the Republic 
are of late Cretaceous age. They are remarkably uniform over the 
entire Southern Peninsula. 
Toward the end of Cretaceous time or in early Eocene time the old 
lavas and younger argillites in the northern part of the Republic were 
intruded by batholiths and stocks of quartz diorite. The older igneous 
5 Miller, G.S., Jr., Remains of mammals from caves in the Republic of Haiti: Smith- 
sonian Misc. Coll., 743: 8, 1922. 
Wetmore, A., Remains of birds from caves in the Republic of Haiti: Smithsonian 
Misc. Coll., 744: 4, 2 text figs., 1922. 
6 Berry, E. W., Tertiary fossil plants from the Republic of Haiti: Proc. U. 8. Nat. 
Mus. (in press.). 
7 Cockerell, T. D. A., A fossil Cichlid fish from the Republic of Haiti: Proc. U.S. 
Nat. Mus. (in press). 
