All Publications
Access all publications and filter by type, location, and search for keywords to find specific science and data information conducted by our scientists.
Filter Total Items: 171064
The microscopic determination of the nonopaque minerals
No abstract available.
Authors
Esper S. Larsen, Harry Berman
The value of questionnaires in commercial fisheries regulations and surveys
No abstract available.
Authors
John Van Oosten
Ulcer disease of trout
During the summer of 1933, lesions of a disease were noted among some fingerling brook, rainbow, blackspotted, and lake trout at the Cortland (New York) trout hatchery. Although these lesions bore a marked superficial resemblance to those of furunculosis, they were sufficiently atypical to warrant further investigation. A more detailed examination of the lesions proved them to be of a distinct dis
Authors
F. F. Fish
Classification and nomenclature of rock units
No abstract available.
Authors
G. H. Ashley, M.G. Cheney, J.J. Galloway, C.N. Gould, C. J. Hares, B.F. Howell, A.I. Levorsen, H. D. Miser, R.C. Moore, J. B. Reeside, W. W. Rubey, T. W. Stanton, G. W. Stose, W.H. Twenhofel
A new lepidolite deposit in Colorado
A newly discovered pegmatite deposit near Ohio City, Colorado, is chiefly lepidolite, massive topaz, beryl, and albite, with some samarskite and columbitc. Three parallel pegmatite dikes, cach about 11 fect thick and 300 feet long, cut black schist. The minerals arc banded parallel to walls, with the following succession from walls to center; fine‐grained albite and quartz, large plates of lcpidol
Authors
E.B. Eckel
Rôle of water conditions in the formation and differentiation of common (banded) coals
No abstract available,
Authors
D. White
Origin and structure of the Pensauken gravel
No abstract available.
Authors
Marius Robinson Campbell, Florence Bascom
Specific yield determined from a Thiem's Pumping‐Test
The specific yield of a water-bearing formation is defined as the ratio of (1) the volume of water, which after being saturated, it will yield by gravity to (2) its own volume (O. E. Meinzer, Outline of ground-water hydrology, U.S. Geol. Sur. Water-Supply Paper 494, p. 28, 1923). It is a measure of the quantity of water that a formation will yield when it is drained by lowering of the water-table.
Authors
L.K. Wenzel
Further remarks on the Cripple Creek Volcano, Colorado
Structural evidence, particularly in the deeper mine‐workings, indicates that the volcano, which is of Tertiary age, was developed by explosive eruptions at a number of points along intersecting fissure‐systems that had been formed in pre‐Cambrian granite by east‐west compression, probably during the Laramide revolution. The volcanic breccia, which consists principally of phonolitic material, appe
Authors
G. F. Loughlin