Now showing items 21-30 of 995
Sources, degradation and recycling of organic matter associated with sinking particles in Lake Michigan
(Elsevier, 1993-01)
Sediment trap material collected at five depths from two locations in Lake Michigan has been studied to determine the sources of particulate organic matter and the early diagenetic changes which occur during sinking of ...
The Pleistocene cinder cones surrounding Volcán Colima, Mexico re-visited: eruption ages and volumes, oxidation states, and sulfur content
(Springer-Verlag, 2006-04)
Located at the volcanic front in the western Mexican arc, in the Colima Rift, is the active Volcán Colima, which lies on the southern end of the massive (∼450 km 3 ) Colima-Nevado volcanic complex. Along the margins of ...
Strontium isotopic geochemistry of intrusive rocks, Puerto Rico, Greater Antilles
(Elsevier, 1980-10)
The strontium isotopic geochemistry is given for three Puerto Rican intrusive rocks: the granodioritic Morovis and San Lorenzo plutons and the Rio Blanco stock of quartz dioritic composition. The average calculated initial ...
On the use of the volumetric thermal expansion coefficient in models of ocean floor topography
(Elsevier, 1980-04-20)
The use of the volumetric thermal expansion coefficient, instead of the linear coefficient, in successful models of ocean floor topography implies that the elastic rigidity of the lithosphere relaxes, enabling isostasy to ...
Late Holocene lake level dynamics inferred from magnetic susceptibility and stable oxygen isotope data: Lake Elsinore, southern California (USA)
(Kluwer Academic Publishers; Springer Science+Business Media, 2004-04)
Southern California faces an imminent freshwater shortage. To better assess the future impact of this water crisis, it is essential that we develop continental archives of past hydrological variability. Using four sediment ...
Evaluation of Land Snails for Clumped Isotope Paleothermometry: A Case Study of the Pleistocene of Bermuda
(2013-06-19)
With the advent of clumped isotope analyses, sources of data that were previously not of use in determining paleoenvironment may become valuable proxies for the reconstruction of past Earth surface temperatures. Land snails, ...
Sampling and faunal turnover in early Eocene mammals
(Elsevier, 1988-02-15)
Faunal turnovers in the fossil record are episodes of synchronous appearance and disapperance of species from a community, often resulting in net change in species richness. We studied the biostratigraphic record of faunal ...
Precambrian evolution of the climate system
(Elsevier, 1990-08)
Climate is an important environmental parameter of the early Earth, likely to have affected the origin and evolution of life, the composition and mineralogy of sedimentary rocks, and stable isotope ratios in sedimentary ...