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Geochronology of augen gneiss and related rocks, Yukon-Tanana terrane, east-central Alaska
John N. Aleinikoff, Cynthia Dusel-Bacon, Helen L. Foster
1986, Geological Society of America Bulletin (97) 626-637
Using several isotopic techniques, we have determined the ages of selected metamorphic rocks in the Yukon-Tanana terrane (YTT) of east-central Alaska. U-Pb zircon data from an augen gneiss body in the Big Delta quadrangle indicate that the granitoid protolith of the gneiss was intruded 341 ± 3 m.y. ago (lower...
Artificial propagation of coregonines in the management of the Laurentian Great Lakes
Thomas N. Todd
1986, Book chapter, Archiv fur Hydrobiologie. Advances in Limnology 22. Advances in fishery biology: Biology, exploitation, rearing and propogation of coregonid fishes
Numerous stresses caused wide fluctuations in the abundance of Great Lakes coregonine fishes during the last century. State, Provincial, and Federal agencies attempted to bolster these fisheries by stocking more than 32 billion fry of lake whitefish (Coregonus clupeaformis) and 6 billion fry of lake herring (C. artedii) over a...
Larval settlement into marine soft-sediment systems: Interactions with the meiofauna
Mary C. Watzin
1986, Journal of Experimental Marine Biology and Ecology (98) 65-113
The distribution and abundance of organisms exhibiting complex life cycles, like marine invertebrates, reflect ecological processes operating at all stages in the life history. Few studies have yet considered the mortality patterns of larvae and juveniles. To test whether the permanent meiofauna play a role in macrofaunal larval site-selection, and/or...
An overview of environmental surveillance of waste management activities at the Idaho National Engineering Laboratory
T.H. Smith, E.W. Chew, T.G. Hedahl, L. J. Mann, T.F. Pointer, G.B. Wiersma
1986, Book, Proceedings for 1986 Waste Management Symposium
The Idaho National Engineering Laboratory (INEL), in southeastern Idaho, is a principal center for nuclear energy development for the Department of Energy (DOE) and the U.S. Nuclear Navy. Fifty-two reactors have been built at the INEL, with 15 still operable. Extensive environmental surveillance is conducted at the INEL by DOE's Radiological...
Minturn and Sangre de Cristo formations of Southern Colorado: A prograding fan delta and alluvial fan sequence shed from the ancestral Rocky Mountains
D. A. Lindsay, R. F. Clark, S. J. Soulliere
1986, Book chapter, Paleotectonics and sedimentation in the Rocky Mountain Region, United States
The Middle Pennsylvania!) Minturn Formation and the Pennsylvanian-Permian Sangre de Cristo Formation of the northern Sangre de Cristo Range form a thick progradational sequence of coarse clastic sediments. These sediments were deposited along the western margin of the central Colorado trough during uplift of the late Paleozoic Uncompahgre highland, a...
Quaternary glacial stratigraphy and chronology of Mexico
Sidney White
1986, Quaternary Science Reviews (5) 201-205
The volcano Iztaccíhuatl in central Mexico was glaciated twice during the middle Pleistocene, once probably in pre-Illinoian (or pre-Bull Lake) time, and once in late Illinoian (or Bull Lake) time. Glaciation during the late Pleistocene was restricted to the late Wisconsin (or Pinedale). A maximum advance and one readvance are...
Effects of urbanization on streamflow, sediment loads, and channel morphology in Pheasant Branch basin near Middleton, Wisconsin
W.R. Krug, G. L. Goddard
1986, Water-Resources Investigations Report 85-4068
A 5-year, data-collection and modeling study was conducted on Pheasant Branch basin in and near Middleton, Wisconsin. The objectives of the study were to: (1) describe the streamflow characteristics, sediment transport, and stream-channel morphology in the Pheasant Branch basin; and (2) relate the above factors to changes caused by urbanization...