Skip to main content
U.S. flag

An official website of the United States government

Dot gov

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Https

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Search Results

183882 results.

Alternate formats: RIS file of the first 3000 search results  |  Download all results as CSV | TSV | Excel  |  RSS feed based on this search  |  JSON version of this page of results

Page 7166, results 179126 - 179150

Show results on a map

Publication Extents

Not all publications have extents, not all extents are completely accurate
Geology of the Moreno Valley, New Mexico
L.L. Ray, J.F. Smith Jr.
1941, Geological Society of America Bulletin (52) 177-210
The Moreno Valley, located along the complex eastern boundary between the Sangre de Cristo Mountains and the Great Plains, is structurally a broad, northwardplunging syncline, disrupted by smaller folds and faults. This major synclinal structure is the result of the Laramide disturbance. Deformation, however, has continued possibly into the Quaternary....
Igneous rocks of the Highwood Mountains, Montana: Part VI. Mineralogy
E.S. Larsen, C.S. Hurlbut, Bennett Frank Buie, C.H. Burgess
1941, GSA Bulletin (52) 1841-1856
The minerals of the igneous rocks of the Highwood Mountains are described. The primary hornblende of the quartz latites is basaltic and it has been partly replaced by a common green hornblende. Hornblende is rare in the alkalic rocks. Augite is an abundant mineral of the alkalic rocks; in the...
Igneous rocks of the Highwood Mountains, Montana: Part VII. Petrology
E. S. Larsen Jr., C.S. Hurlbut, C.H. Burgess, Bennett Frank Buie
1941, GSA Bulletin (52) 1857-1868
In the shonkinite series olivine, leucite, and analcime crystallized only from magmas with over 20 per cent of mafites. At this stage the leucite and analcime inverted to pseudoleucite. Pyroxene crystallized over the whole range of rocks and changed little in composition until the magma reached the composition of nepheline...
Igneous rocks of the Highwood Mountains, Montana: Part V. Contact Metamorphism
Esper Signius Larsen Jr., Bennett Frank Buie
1941, GSA Bulletin (52) 1829-1840
Very near the contacts of the stocks the sediments have been replaced by sanidine and diopside, through magmatic reaction. An irregular zone of indurated sediments, produced largely by hydrothermal agents, extends outward from the stocks for as much as half a mile. Locally, more intense hydrothermal metamorphism has formed orthoclase...
Igneous rocks of the Highwood Mountains, Montana: Part II. The Extrusive Rocks
E. S. Larsen Jr.
1941, GSA Bulletin (52) 1733-1752
Early eruptions of quartz latites, rather rich in potash, built up a volcanic mountain over 30 miles across on an irregular surface of late Cretaceous sediments. Erosion then removed much of the quartz latite. Renewed volcanism formed a volcano made up of basaltic rocks (mafic phonolite) that covered the quartz...
Blood parasites of birds of the District of Columbia and Patuxent Research Refuge vicinity
P.W. Wetmore
1941, Journal of Parasitology (27) 379-393
Recently a number of surveys of blood parasites of birds have been made in different parts of this country by different workers, the general purpose of which was to further the knowledge of the distribution andpathogenicity of these protozoa. This paper treats the distribution of parasites found in sampling miscellaneous...
Notes on the elasticity of the Lloyd sand on Long Island, New York 
C. E. Jacob
1941, Eos, Transactions, American Geophysical Union 783-787
The Lloyd sand is a productive artesian aquifer underlying all of Long Island except the westernmost part. It rests unconformably upon a floor of crystalline rock that slopes toward the southeast at about 100 feet to the mile. Locally the bed‐rock surface has a relief of more than 100 feet....
Ground‐water inventory in the Upper Gila River Valley, New Mexico and Arizona: Scope of investigation and methods used
S.F. Turner, L.C. Halpenny
1941, Eos, Transactions, American Geophysical Union (22) 738-744
The Division of Ground Water of the Geological Survey, United States Department of the Interior, has been making an inventory of the water‐resources of the upper Gila River since January 1, 1940. Funds for the project are furnished under a cooperative agreement with the Arizona State Water Commissioner, supplemented by...
Coefficients of storage and transmissibility obtained from pumping tests in the Houston District, Texas
C. E. Jacob
1941, Eos, Transactions, American Geophysical Union (22) 744-756
An investigation of the ground‐water supply of the Houston District, in Texas, has been in progress since December, 1930, under the general direction of O. E. Meinzer, Geologist‐in‐Charge of the Division of Ground Water of the Geological Survey. The Houston District, as the term is used here, comprises all of...
Fluctuations of water‐level in wells in the Los Angeles basin, California, during five strong earthquakes, 1933–1940
G.A. LaRocque Jr.
1941, Eos, Transactions, American Geophysical Union (22) 374-386
Numerous ground‐water hydrologists have obtained records of water‐level surges in wells during earthquakes and of heightened or lowered levels after those earthquakes. Many of these surges and changes of level are undoubtedly direct effects of the several earthquake‐waves that are recorded on seismographs. Thus, water‐level recorders on observation‐wells promise to...
Report of committee on underground waters, 1940–41
David G. Thompson
1941, Eos, Transactions, American Geophysical Union (22) 948-950
The membership of the Committee during the past year has continued as it was a year ago [see Trans. Amer. Geophys. Union, p. 433, 1940].During a large part of the year, particularly during the last few months, many of the members of the Committee have been engaged in activities more...
Depth of active solution by ground‐waters in the Pecos Valley, New Mexico
Arthur M. Morgan
1941, Eos, Transactions, American Geophysical Union (22) 779-783
The Pecos River Drainage‐Basin is underlain by a thick series of Permian rocks consisting largely of limestone, gypsum (or anhydrite), and halite. The beds have a regional eastward or southeastward dip of 40 to 80 feet to the mile and successively younger beds are exposed at the surface from west...