Publications
These publications showcase the significant science conducted in our Science Centers.
Filter Total Items: 16786
Holocene paleoclimatic evidence and sedimentation rates from a core in southwestern Lake Michigan
Preliminary results of a multidisciplinary study of cores in southwestern Lake Michigan suggest that the materials in these cores can be interpreted in terms of both isostatically and climatically induced changes in lake level. Ostracodes and mollusks are well preserved in the Holocene sediments, and they provide paleolimnologic and paleoclimatic data, as well as biogenic carbonate for stable-isot
Authors
Steven M. Colman, Glenn A. Jones, R. M. Forester, D. S. Foster
Peridinialean dinoflagellate plate patterns, labels and homologies
Tabulation patterns for peridinialean dinoflagellate thecae and cysts have been traditionally expressed using a plate labelling system described by C.A. Kofoid in the early 1900's. This system can obscure dinoflagellate plate homologies and has not always been strictly applied. The plate-labelling system presented here introduces new series labels but incorporates key features and ideas from the m
Authors
Lucy E. Edwards
Evidence against a late Wisconsinan ice shelf in the Gulf of Maine
Proposals for the formation of a late Wisconsinan ice shelf in the Gulf of Maine during the retreat of the Laurentide Ice Sheet are considered to be inappropriate. An Antarctic-type ice shelf does not fit the field data that indicate temperate glacial, terrestrial, and marine climates for the region between 18 ka and 12 ka. A temperate ice shelf has no modern analogues and may be physically imposs
Authors
R. N. Oldale, R.S. Williams, Steven M. Colman
Particle velocity interpolation in block-centered finite difference groundwater flow models
A block-centered, finite difference model of two-dimensional groundwater flow yields velocity values at the midpoints of interfaces between adjacent blocks. Method of characteristics, random walk and particle-tracking models of solute transport require velocities at arbitrary particle locations within the finite difference grid. Particle path lines and travel times are sensitive to the spatial int
Authors
Daniel J. Goode
Ancient channels of the Susquehanna River beneath Chesapeake Bay and the Delmarva Peninsula
The trunk channels of each system are 2 to 4 km wide and are incised 30 to 50 m into underlying strata; they have irregular longitudinal profiles and very low gradients within the Chesapeake Bay area. The youngest paleochannel is clearly of late Wisconsinan age, about 18 ka, and the intermediate one appears to be late Illinoian in age, or about 150 ka. The age of the oldest is in the range of abou
Authors
Steven M. Colman, J.P. Halka, C. H. Hobbs, R. B. Mixon, D. S. Foster
Fine-grained rutile in the Gulf of Maine: Diagenetic origin, source rocks, and sedimentary environment of deposition
The Gulf of Maine, an embayment of the New England margin, is floored by shallow, glacially scoured basins that are partly filled with late Pleistocene and Holocene silt and clay containing 0.7 to 1.0 wt percent TiO 2 , chiefly in the form of silt-size rutile. Eleven basins in the gulf are estimated to contain 479 X 10 6 metric tons of TiO 2 (to a depth of 10 m) in the U.S. exclusive economic zone
Authors
P. C. Valentine, J.A. Commeau
Loss of coastal wetlands in Louisiana: Cooperative research to assess the critical processes
Erosion of the nation's shoreline and loss and deterioration of our coastal wetlands are widespread and serious problems that affect all regions of the US. As a result of natural and human-induced factors, the coastal plain of Louisiana, which contains 40% of the tidal wetlands in the conterminous 48 States, is undergoing the greatest amount of coastal erosion and wetlands loss in the nation. The
Authors
S.J. Williams, A. H. Sallenger
Study indicates feather meal can be a good supplement in trout diets
No abstract available.
Authors
S. Hughes
Infectious pancreatic virus can be recovered from wild bird feces
No abstract available at this time
Authors
P. E. McAllister, W. J. Owens
Identification of fish virus by immunoblot assay of virus plaques
No abstract available at this time
Authors
P. E. McAllister, W. J. Owens
Comparative susceptibility of brook trout, lake trout and Atlantic salmon to infectious pancreatic necrosis
No abstract available at this time
Authors
P. E. McAllister, W. J. Owens
Some Edwardsiella ictaluri strains are Romet resistant
No abstract available at this time
Authors
C.E. Starliper, R.K. Cooper, E.B. Shotts