Now showing items 11-20 of 307
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 ...
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 ...
Si-Al ordering in nephelines
(Springer-Verlag, 1971-06)
Different degrees of Si-Al ordering are demonstrated to exist in nepheline on the basis of five crystal structure refinements on specimens with different geologic origins and laboratory treatments. Disorder increases in ...
Zircon and whole-rock Nd-Pb isotopic provenance of Middle and Upper Ordovician siliciclastic rocks, Argentine Precordillera
(Blackwell Publishing Ltd, 2007-02)
Experimental simulations of gas-driven eruptions: kinetics of bubble growth and effect of geometry
(Springer-Verlag; Springer-Verlag Berlin Heidelberg, 1998-02)
Simulated gas-driven eruptions using CO 2 –water-polymer systems are reported. Eruptions are initiated by rapidly decompressing CO 2 –saturated water containing up to 1.0 wt.% CO 2 . Both cylindrical test cells and a flask ...
The hydrothermal component in ferromanganese nodules from the southeast Pacific Ocean
(Elsevier, 1989-06)
Statistical analyses of geochemical data from ferromanganese nodule samples representing a broad area of the southeast Pacific Ocean indicate nodule compositions are controlled by four factors: (1) suboxic diagenesis; (2) ...
Modern and ancient geotherms beneath southern Africa
(Elsevier, 1988-04)
Estimates of subsurface temperatures in the Archean craton of southern Africa during the Archean derived from diamond thermobarometry studies are remarkably similar to temperatures estimated for the same depths today, even ...
Mio-pliocene seasonality on the snake river plain: comparison of faunal and oxygen isotopic evidence
(Elsevier, 1994-02-28)
Analysis of fish faunas and oxygen isotopic composition of a fish otolith from lacustrine deposits of southwestern Idaho provide a means of evaluating regional Miocene and Pliocene climates. A disharmonious assemblage ...