Now showing items 1-10 of 190
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 ...
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 ...
Composition and origin of summertime air pollutants at Deep Creek Lake, Maryland
(Elsevier, 1989)
A 1 month intensive summertime field study conducted in rural western Maryland resulted in a comprehensive set of fine particle, gaseous and meteorological data. Sulfur in the assumed form of ammonium sulfate accounted for ...
The Phylogeny And Classification Of The Tetrapods, Vol 1, Amphibians, Reptiles, Birds, Vol 2, Mammals - Benton,mj
(Macmillan Magazines Ltd., 1988-12-15)
New Palaeogene Primate Basicrania And The Definition Of The Order Primates
(Macmillan Magazines Ltd., 1983)
Climatic oscillations during the Precambrian era
(Kluwer Academic Publishers; D. Reidel Publishing Company ; Springer Science+Business Media, 1987-07)
A remarkably regular cyclicity with a fundamental period of ~11–12 cycles is preserved in the 680 million year old Elatina formation of South Australia. All but one of the many periods present can be interpreted as resulting ...
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 ...