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Page 6109, results 152701 - 152725

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Palynological and stratigraphic investigations of four deep wells in the Salisbury Embayment of the Atlantic Coastal Plain
Eleanora I. Robbins, William J. Perry Jr., James A. Doyle
1975, Open-File Report 75-307
Use of palynological zones defined by Brenner and Doyle from the Cretaceous outcrop belt in Maryland, Delaware, and New Jersey permit correlation of the Cretaceous section in four wells drilled to basement in the Salisbury Embayment in the Eastern Shore of Maryland and in Accomack Co., Virginia. These correlations, supplemented...
Use of elevated nest baskets by ducks
Harold A. Doty, F.B. Lee, A.D. Kruse
1975, Wildlife Society Bulletin (3) 68-73
Open-top nest baskets were mounted on upright metal poles in various wetlands to assess the value of baskets as a potential technique for increasing duck nest success. Observations were made from 1966-1968 in North and South Dakota, Minnesota, and Wisconsin and were continued through 1973 in North Dakota. Baskets were...
Limitations on analysis of small particles with an electron probe: Pollution studies
Robert H. Heidel, G. A. Desborough
1975, Environmental Pollution (8) 185-191
Recent literature concerning the size and composition of airborne lead particles in automobile exhaust emission determined by electron microprobe analysis reports fourteen distinct lead compounds. Particle sizes reported were from 0·2 μm to 2 μm in diameter. The determination of chemical formulae for compounds requires quantitative elemental data for individual...
The new Martian nomenclature of the international Astronomical Union
Vaucouleur G. de, J. Blunck, M. Davies, A. Dollfus, I.K. Koval, G. P. Kuiper, H. Masursky, S. Miyamoto, V.I. Moroz, C. Sagan, B. Smith
1975, Icarus (26) 85-98
A new nomenclature for Martian regions and topographic features uncovered by Mariner 9, as officially adopted by the International Astronomical Union, is described. About 180 craters, generally of diameters >100 km, have been named, as well as 13 classes of topographic...
The determination of specific forms of aluminum in natural water
R.B. Barnes
1975, Chemical Geology (15) 177-191
A procedure for analysis and pretreatment of natural-water samples to determine very low concentrations of Al is described which distinguishes the rapidly reacting equilibrium species from the metastable or slowly reacting macro ions and colloidal suspended material. Aluminum is complexed with 8-hydroxyquinoline (oxine), pH is adjusted to 8.3 to...
Water analysis
M. J. Fishman, D. E. Erdmann
1975, Analytical Chemistry (47) 334-361
No abstract available....
Modes of fossil preservation
J. M. Schopf
1975, Review of Palaeobotany and Palynology (20) 27-53
The processes of geologic preservation are important for understanding the organisms represented by fossils. Some fossil differences are due to basic differences in organization of animals and plants, but the interpretation of fossils has also tended to be influenced by modes of preservation....
Survival of wood duck and mallard broods in north-central Minnesota
I.J. Ball, D.S. Gilmer, L.M. Cowardin, J. H. Riechmann
1975, Journal of Wildlife Management (39) 776-780
Duckling survival in wood duck (Aix sponsa) and mallard (Anas platyrhynchos) broods was estimated from data obtained from 71 radio-marked brood hens on a study area in north-central Minnesota. Radio-marked hens produced 30 broods during the study, and 41 hens already leading broods were captured and radio-marked. Production estimates based...