The relation between earth movements and volcanism in the San Juan Mountains of Colorado
Esper S. Larsen Jr.
1949, Eos, Transactions, American Geophysical Union (30) 862-866
The late Tertiary volcanism in the San Juan Mountains of southwestern Colorado followed a long interval during which the crust was stable. The volcanic rocks have been divided into four main groups, (1) those of pre‐Potosi (?) age in the eastern area, (2) the Lake Fork quartz latite, San Juan...
Buried preglacial ground water channels in the Albany-Schenectady area in New York
Eugene S. Simpson
1949, Economic Geology (44) 713-720
A map is presented showing contours of the buried preglacial channel of the Mohawk River from Schenectady, New York, to its confluence with the Hudson River about 12 miles south of Albany and of associated buried preglacial channels. The Pleistocene history of a portion of the Mohawk and Hudson Rivers...
Magnitude and frequency of floods in Minnesota
C. H. Prior
1949, Bulletin 1
No abstract available....
Preliminary report on the stratigraphy and structure of the Kukpowruk and Kokolik Rivers area, Alaska
Robert M. Chapman, Edward G. Sable
1949, Geological Investigations, Naval Petroleum Reserve No. 4, Alaska 27
No abstract available....
Preliminary report on stratigraphy and structure of the areas of the Etivluk, Kuna, and Nigu Rivers, Alaska
M. D. Mangus, R. L. Detterman, A.H. Lachenbruch, M. C. Lachenbruch
1949, Geological Investigations, Naval Petroleum Reserve No. 4, Alaska 26
No abstract available....
The stratigraphy and structure of the Okpikrurak and Kiruktagiak River areas, Alaska
William W. Patton Jr., I.L. Tailleur
1949, Geological Investigations, Naval Petroleum Reserve No. 4, Alaska 25
No abstract available....
Suggested correlation in Simpson seeps region
F. M. Robinson, Robert Thomas
1949, Geological Investigations, Naval Petroleum Reserve No. 4, Alaska 13
During the 1949 drilling season eight core tests were completed in the Simpson Seeps area up to October 25th„ This program, which is still in progress, was undertaken to provide an explanation for the surface seeps near Caps Simpson. The shallowest of the eight holes reached 800 feet; the deepest...
Preliminary report on the Mississippian rocks of the Kanayut, Nanushuk, and Itkillik Lake areas, Alaska
Arthur Leroy Bowsher, J. Thomas Dutro
1949, Geological Investigations, Naval Petroleum Reserve No. 4, Alaska 24
No abstract available....
Preliminary reports on the Carbon Creek anticline and on the upper Meade River, Alaska
Charles L. Whittington, Samuel A. Keller
1949, Geological Investigations, Naval Petroleum Reserve No. 4, Alaska 23
No abstract available....
Preliminary report on the stratigraphy and structure of the Titaluk anticline in the vicinity of Maybe Creek, Alaska
W. P. Brosge, A. N. Kover
1949, Geological Investigations, Naval Petroleum Reserve No. 4, Alaska 22
No abstract available....
A streptomycete pathogenic to fish
R.R. Rucker
1949, Journal of Bacteriology (58) 659-664
No abstract available. ...
Terrain diagrams of the Philippine Islands
P. B. King, Edith M. McKee
1949, GSA Bulletin (60) 1829-1836
This paper presents four terrain diagrams, on a scale of 1:1,000,000, which cover all the Philippine Islands. The diagrams were prepared during World War II by the Military Geology Unit of the U. S. Geological Survey for the Chief of Engineers, U. S. Army. Terrain features shown on the diagrams...
The computation of second vertical derivatives of geomagnetic fields
Roland G. Henderson, Isadore Zietz
1949, Geophysics (14) 508-516
Second vertical derivatives of magnetic fields, because of their high resolving power, are often very useful in interpreting magnetic anomalies. Formulas are developed which permit their ready numerical computation. Comparisons are made between the resulting approximate values and the rigorous values obtained for simple idealized fields. The similarity between maps...
Hawaiian petrographic province
G. A. Macdonald
1949, GSA Bulletin (60) 1541-1596
The lavas of the Hawaiian Islands range from mafic picrite-basalts and melilite-nepheline basalts to salic trachytes. Olivine basalt, by far the most abundant type, is regarded as representing the parent magma of the Hawaiian province. Closely associated with the olivine basalts are basalts, and picrite-basalts with many large phenocrysts of...
Cannel, boghead, torbanite, oil shale
James Morton Schopf
1949, Economic Geology (44) 68-71
The gradational interrelationship of coal with cannel, boghead, torbanite, and oil shale is reemphasized in view of contrary opinions expressed recently. An example from South Africa that has recently been studied in some detail is cited in illustration of how closely coal and torbanite may be related. The scientific classification...
Lower middle ordovician of south-central Pennsylvania
Lawrence C. Craig
1949, GSA Bulletin (60) 707-779
Broad paleostructural development in south-central Pennsylvania and Maryland was similar to that of central and eastern New York during the deposition of lower Middle Ordovician beds. Thick marine limestones of the easternmost belts of outcrop in the Cumberland Valley indicate the southward extension of the Champlain miogeosyncline. Thin and, in...
Geologic mapping in the United States
Leona Boardman
1949, GSA Bulletin (960) 1125-1132
An inventory of geologic mapping in the continental United States shows the areal extent of published geologic maps, differentiated by scales, and gives the results of calculations of the approximate number of square miles geologically mapped in each State on several scales, with separate figures for the maps published since...
Annual floods and the partial‐duration flood series
Walter B. Langbein
1949, Eos, Transactions, American Geophysical Union (30) 879-881
Flood data are ordinarily listed either in annual‐flood series or in a partial‐duration series. If the expectancy of a flood in the duration series ϵ is known, then the probability of that flood being an annual flood is shown to be e−ϵ. From this relationship it is possible to transform...
Cleavage in east‐central Vermont
Walter S. White
1949, Eos, Transactions, American Geophysical Union (30) 587-594
Two types of cleavage, schistosity (flow cleavage) and slip cleavage, are common in the metamorphosed sediments of east‐central Vermont. Two generations of cleavage are also recognized. Cleavage of the earlier stage of deformation is schistosity, and is generally parallel to bedding. Just west of the Monroe Fault, along the eastern...
Artificial recharge of ground water by the city of Bountiful, Utah
1949, Eos, Transactions, American Geophysical Union (30) 539-542
The City of Bountiful, Utah, is situated just beyond the eastern edge of an area where alluvial gravel and sand of Pleistocene and probably Tertiary age yield water by artesian flow. Attempts to recharge these aquifers by diversion of surplus stream water into a spreading canal east of the city...
Discussion of “Runoff from rain and snow” by Arthur M. Piper
H.W. Sexton, Arthur M. Piper
1949, Eos, Transactions, American Geophysical Union (30) 606-607
As a basis to study the discharge characteristics of the Metolius River the John Day River was used. The Deschutes Basin of which the Metolius drainage area is a part was compared to the John Day Basin. There are several factors which must be considered when comparing the two basins....
Volcanic activity on Umnak and Great Sitkin Islands, 1946–1948
F.M. Byers Jr., W. W. Brannock
1949, Eos, Transactions, American Geophysical Union (30) 719-734
As part of the United States Geological Survey's volcano program in the Aleutian volcanic arc during 1946–1948, the volcanoes and thermal areas on Umnak and Great Sitkin Islands were studied. In addition to observation of the volcanoes, temperatures of fumaroles were measured and some products of the volcanic activity were...
Recovery of ground‐water supplies by pumping from watertable ponds
Henry N. Halberg, Claude M. Roberts
1949, Eos, Transactions, American Geophysical Union (30) 283-292
This paper summarizes a study made to determine whether ground‐water storage in the glacial deposits in the vicinity of Fresh Pond, a water‐table pond used as part of the public supply of the City of Cambridge, Massachusetts, is available to augment the supply from surface‐water reservoirs.Test wells were drilled; water...
Reservoir systems in Maine
Miner R. Stackpole
1949, Eos, Transactions, American Geophysical Union (30) 437-438
The numerous lakes and ponds that are found in almost every portion of the State of Maine are important resources of the state. There are 2222 bodies of fresh water that are classed as great ponds, that is, ponds whose areas are ten acres or more, and the total area...
Report of the Committee on Runoff, 1948–1949
C. C. McDonald
1949, Eos, Transactions, American Geophysical Union (30) 911-915
Because of the widely scattered locations of the membership, no assembled meeting of the Committee was held during the year, all discussions being held by correspondence. Consideration was given to three subjects during the year: (1) standardization of terminology as related to runoff (continued from previous year), (2) deficiencies in...
