The Prescott daily news., 1914-04-08
LATEST ADDITION TO GEOLO-
GIG MAP OF UNITED STATES
United States Geological Survey Is
sues Folio on the BarnesbOro-
Patton Coal Acres in
Pennsylvania.

One of the latest additions to the
great geological map of the United
States, which is being published in
parts by the United States Geological
Survey, is the Barnesboro- Patton TO-
Ito, recently issued. Under the plan
adopted for the preparation of the
Geologic Atlas, the entire country is
divided into small quadrangles bound
these quadrangles, which number sew
eral thousand, are separately survey
ed and mapped. The maps and des-
cription of each quadrangle are is
sued in the form of folio, designated
by the name of the principal town or
of prominent natural feature with
in the quadrangle. The Barnesboro-
Patton folio is No. 1S9 of the series.
This folio includes maps and a de-
tailed description of the topography
and geology of two quadrangles in
west-central Pennsylvania, comprising
an area of about $50 square miles in
Cambria Indiana, Clearfield, and Blair
counties. The area is situated near
the northeastern border of the Appa
lachian coal province and is being &C
lively developed for coal.
The folio contains detailed maps on
the scale of inch to the mile, show
ing the topography and the areal,
structural, and economic geology, ac-
companied by a descriptive text.
The topographic maps are engraved
and printed in three colors, and the
relief is depicted by contour lines
drawn at 20-foot intervals, showing
accurately the shapes of the hills and
valleys and their height above sea le-
vel. All the roads and every building
in the area covered by the maps are
plainly shown.
On the areal- geology map the areas
occupied by the outcrops of the sever
al rock formations and of the princi-
pal members of each formation are
shown in different colors. The struc-
tural and economic geology maps
show the outcrop OF each important
bed Of coal, the location of mines and
prospects, and by means of structure
contour lines indicate the depth be
ncaht the surface Of the different
coal beds.
An interesting portion of the text
| &c 10 Of IA
tory of the area. The origin of the
present aspect Of the area is explain
ed, and the different stages of de-
velopment through which the region
has passed, age by age through IN
told millions of years, are clearly set
forth. The present dssected plateau
having an elevation between 200 and
2,4O0 feet, was not so very long ago
an area of plains near sea level.
During the time of the formation of
thee oal, the area was a vast series of
marshes in which plants OF various
types grew luXuriantly. Theirs re-
mains fell into the water and were
preserved from decay until they form
ed great accumulations of vegetable
matter, not unlike the peat swamps
in certain parts of thew orld at the
present day. In still earlier times
the area was submerged beneath a
sea in which were deposited many
thousand feet of sand, mud and cal
careous matter, now consolidated into
sandstone, shale and limestone.
Special attention isg iven to the TO
Ito to the occurrence of coal in this
region, and a large number of analy-
ses are presented to show its chemi-
cal character. Other mineral resour-
ces described are clay, building stone
and limestone.
Applications for this folio. which
will be sold for % cents a copy, should
be made to the Director, Geological
Survey, Washington, ID. c.