Evening star., 1944-09-03
Experts Complete Map
Depicting Entire U. 5.
Geologic Structure
Special Dispatch to TIE Star.

NEW HAVEN, Conn, Sept. g.
Chester r. Longwell, Henry Barnard
Davis, professor of geology at Yal,
University, today announced tn.
completion, f.fter nine years, of 6
map OF the United States depictine
the complete geologic structure OF
the Nation.
Professor Longwell, who is also
curator of geology at Yale, heads a
committee of 16 experts who con-
Quoted the exhaustive study which
developed the map. The committee
Is division TO the National Research
Council, an affiliate of the National
Academy of Sciences.
First Map of Kind.
The map, in dimensions 4 feet by
612 and feet and with a scale of 40
miles to the inch, is the first of its
KIND published. 1t will be of i'm
mense practical value in MANY fields.
particularly:
AS an aid to petroleum geologists
In giving them an overall picture of
the major structural features of bed
rock, with a consequent direct rela-
tlonshlp to the occurrence of pe-
troleum.
To research biologists, who are
working on the causes of large scale
movements of the earths crust.
10 instructors in geology in teach
Ing this science in college class
rooms throughout the country.
The committee which directed the
survey began laying plans in 1885.
shortly after Prof. Longwell was ap-
pointed chairman. Funds were first
provided by the National Research
Council, then additional funds were
granted by the American Association
of Petroleum Biologists and bv the
Geological Society of America
Committee Works Years,
The committee members, chosen
from previously designated sections
OF the country, worked in the pe-
Rod from 1885 through 1910 in CO.
operation with biologists in the va
rlous districts, gathering informa-
ton and checking it with local rep
resentatives before forwarding it to
the United States Geological Sur
Vey In Washington, where all in
formation was first compiled before
pelng transferred to the map.
On the completion of this work
IN 1910, preliminary edition of the
map was prepared for limited dis
trloutlon and criticism; and on the
paSls OF the resulting suggestions
work was resumed on the final and
revised edition.
Earlier plans scalled for the conn
pletion of the map in 1s4Len1An
cause OF the advent of but be-
the, the subsequent iIthe war and
work on the ps1 3lerease in war
engaged in nt of the geologists
vision to6the study, the final re-
Sokok nearly four years.
0lors Indicate Features.
The varied geologic features of
the Nation are indicated on the map
by colors, seven in all. Brown indi-
Gates structure contours; green, VOL
canlc rock; red, major intrusive
bodies Of granite rock; lavender the
Oldest of all foundation rocks, ex-
posed at the surface; blue, older
rocks which were very greatly dis
turbed by pressure, heat, ETC.; black.
the chief types of intense deforma-
tlonS; gray, denoting geographic
features, streams, ETC.; and blue
again, used in offshore regions to
denote sea floor contours at points
Immediately adjacent to the con-
tinent.
Although the map is completed.
copies of 1t will not be available for
another month. approximately 5000
VIII be printed and will be for sale
at cost to all who are interested,
by the American Association of Pc
troleum Biologists, Tulsa, Okla.
The committee working with Prof.
LongWell in the completion of the
map was composed of the following
men:
Profs. c. H. Behre, w H. Bucher
and G. Marshall Kay, all of the
department of geology at Columbia:
Drs. Eugene Callaghan, D. H. Hewett.
G. R. Mansfield, Watson Monroe. Ut.
Pardee, G. w. Stose and P. B. King.
committee vice chairman, all of the
Geological Survey; DR.. E. B. Knopf
OF New Haven and A. l. Levorsen,
consulting geologist, of Tulsa, Okla.
Prof. T. S. Lowering, department
OF geology, University of Michigan:
Prof. w T. Thorn, department of
geology, Princeton University; Prof.
A. c. Waters, department of geology
Stanford University; DR.. E. D. Viii
son, Arizona Bureau of Mines, Tue
son, Arlz.; and Prof A. o. Wood
ford, department of geology, 70
mona College, California.
Candidate AssaiIs Plan