PACIFIC SCIENCE, Vol. II, July, 1948 
218 
FlG. 4. Sketch map of the eastern part of Moen Island, showing Mt. Witipon and the localities from which 
rock samples were collected. 
posed of, or believed to be underlain by, con¬ 
tinental rocks.” He offers no evidence in sup¬ 
port of these statements, and for the reasons 
to be given, the writer prefers the arrangement 
shown in Figure 3. 
FIELD WORK 
In August, 1946, the writer spent 10 days 
in Truk studying the geology and mineral re¬ 
sources of the islands in- connection with the 
Economic Survey of the former Japanese Man¬ 
dated Islands. This survey was conducted by 
the U. S. Commercial Company, a subsidiary of 
the Reconstruction Finance Corporation, and 
was made at the request of the U. S. Navy. 3 
At the time of the visit the writer was not 
3 The geologic reports resulting from this survey 
have been placed in open file in the offices of the U. S. 
Geological Survey, Washington, D. C., and Honolulu, 
T. H. A microfilm of the entire report has been de¬ 
posited in the Library of Congress. 
familiar with Kramer’s report and consequently 
made no special search for metamorphic rocks. 
Later, during the preparation of the report, his 
attention was called to Kramer’s statement, and 
he was at once impressed with the similarity 
of the description of the topography and vege¬ 
tation of Mt. Vidiboen on Vela Island with 
conditions observed on the eastern part of Moen 
Island. 
Subsequent inquiry has established the fact 
that the two islands are identical. According 
to Karl J. Pelzer (oral communication, 1947), 
a geographer with the Economic Survey who 
was stationed on Truk for 4 months in the spring 
and summer of 1946, Vela is one of the many 
names which have been applied to Moen 
(Wona) Island, and Vidiboen is clearly a 
variant of Witipon, an 890-foot peak which 
dominates the eastern end of this island (Figs. 
