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Page 5941, results 148501 - 148525

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Publication Extents

Not all publications have extents, not all extents are completely accurate
Earthquake magnitudes from hydroseismic data
R.C. Vorhis
1965, Groundwater (3) 12-20
If earthquakes are recorded on your water‐level charts, you can make your own estimate of earthquake magnitudes! As an aid in doing this, this paper presents two graphs: one to calculate distance from well to earthquake epicenter; the other, a nomogram from which to read hydroseismic magnitude plus log C. Examples given show (1) direct computation of...
Magnetization of Keweenawan rocks near Duluth, Minnesota
C.E. Jahren
1965, Geophysics (30) 858-874
Remanent magnetization measurements on 200 oriented samples from the Keweenawan gabbro, diabase, and associated rocks in the Duluth area show a clustering of directions west-northwest and downward. Gabbro samples magnetized in this direction usually have Q, the ratio of remanent to induced magnetization, up to five, whereas other gabbro samples have larger Q. Diabase shows no such generalization. Remanent magnetization is...
Mathematical models of catchment behavior
David R. Dawdy, Terence O’Donnell
1965, Journal of the Hydraulics Division (91) 123-137
After an examination of trends in the modeling of hydrologic systems, a review of some recent studies is given. The authors' preliminary studies on the feasibility and efficiency of the automatic evaluation of catchment model parameters by use of a digital computer are described and some results presented....
Ages of minerals from metamorphic and igneous rocks near Iron Mountain, Michigan
Lyman Thomas Aldrich, G.L. Davis, H. L. James
1965, Journal of Petrology (6) 445-472
More than 100 independent isotopic ages have been determined for minerals from an area in northern Michigan about 35 miles square. Granites, pegmatites, and metamorphosed sedimentary and volcanic rocks have yielded Rb-Sr ages for feldspar, muscovite, and biotite, K-Ar ages for hornblende, muscovite, biotite, and feldspar, and U-Pb and Th-Pb ages for zircon. It was anticipated that we would learn from the measurements both...