The Richmond Virginian. (Richmond, Va.) 1910-1920, 1919-10-07
CONTRIBUTIONS. To
GEOLOGY Of THE i. S.

withdrawing the pressure Of
war work and the need IF eoncentra}-
ing the forces Of the United states
geological survey, department 81 thr
Interior. on the Task Of providing do
nestle supplies of war minerals In
replace those that had before been
brought overseas from remote re
Eous, this bureau OF the government
during the last two years has main
tanned its publication ~ seientjde
memoirs. number Of which have
3ast been issued as professional paper
}2a under the title Shorter Contri-
buttons to General Geology. 1918"
In the first of these memoirs, that
items az Carbon Dioxide In Water or
tAa cuff OF Mexico It is shown that
the total carbon dioxide in the water
Of the Gulf Of Mexico Increases with
the depth Of the watcr~~that is, with
decrease of temperature However.
this carbon dioxide exists mainly In
the form OF carbopates and bicarhon~
ates. for the waters Of the gulf CON
tain very little free carbon dioxi de.
A region In northeastern Montana
that Ia very interesting to the
etatngist is described by A ] Collier.
and the results OF paieontoloRic
studies showing the presence nf de
posts Of Claiborne and Jackson To
ctue age in Georgia are reported by
e w. Cooke and II X Shearer. the
latter geologist Of the state geoloe
icai survey, In corporation with
which the inveSt legations were made
4 contribution 10 the history OF the
deposition Of scme OF the geologic
formations of the phosphate bearing
region OF sonthw esteru Montana is
made by n Dale Condit in a paper
ON the "Reiations OF Late Paleo2ic and
Early Ncsozoic Formations ~ south
western Montana and Adjacent rarts
a. Wyoming" and the composition,
ip}ncraloKy. and correlatf6us Of Ger
tam notable iGneous rocks are de
trtbed In n paper on Two Lampro-
pbyre nlkes- near Santa1uin. Mount
%cbo, Utah" by G. r Louahlin. "A
report on the structure ard strait
eraphy of Gravina and RevillaeigeAo
Islands. Alaska nv T'heedor@ Chaplin,
Establishes now geologic correlations
and writes "A new chapter Of the
geologic history Of this part Of tho
! continent. based anon the discovery
- fossil shells OF various tyres IN
rocks Of several geologic periods IN
the region
AS an ard to geologists in the field
who NAV dFSIre 10 determine the
depth and thickness # strata and
their projection beneath the surface
~ an almost Instantaneous process
without recourse TO tables and math-
enatical calculations. Harold $
Palmer presents new graphic meth
DDS in diagrams and scales by which
the biologists may make approx
mate determinations almost OF
hand
A paper by T. w stephenson CIV
ing the results 81 recent corrcla
lions and discoveries AS to the geo
logic history Of a part ~ northeast
trn TEXAS contafnH a revised man 81
a part of northern Texas on which
structure favorable 70 the occur
renee of oil ia shown
Fossil hsh scalee found in large
numbers in beds of Cretaceous age
. In the Rocky Mountain region have
been studied by Prot r. n A Cooke
rclI. who in the almost microscopic
sculpture OF the scales finds cri-
terra by which he ia able not only
TO recognize the families of the ex-
tinct fishes but even TO draw CON
illusions as to their peculiarfties and
hahits BY means or these scales
Professor CockerelI is able to sug-
gest the lines of descent Of fishes
now living from forms that lived in
the sea millions Of years ago
This collection OF papers which
form Professional PAPER fg0 Of the
nited States Geological survey and
ar" strictly technical. may he oh
tanned by addressing the Director Of
the Survey. at Washington. n. c.