Now showing items 1-10 of 104
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 ...
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 ...
Effect of regional topography and hydrology on the lacustrine isotopic record of Miocene paleoclimate in the Rocky Mountains
(Elsevier, 1993-03)
Oxygen isotopic compositions of upper Miocene (9.2 m.y.) lacustrine limestone from northwestern Wyoming range from -21.5 to -35.2% (PDB) and are the lightest yet reported for a non-marine carbonate sequence. These values ...
Global change at the Paleocene-Eocene boundary: climatic and evolutionary consequences of tectonic events
(Elsevier, 1990-07)
Events of the Paleocene-Eocene boundary provide the clearest example to date of how a tectonic event may have global climatic consequences. Recent advances permit well-constrained stratigraphic determination of several ...
Miocene lacustrine algal reefs--southwestern Snake River Plain, Idaho
(Elsevier, 1990-04)
The Hot Spring limestone is a shallow-water algal carbonate within a late Tertiary transgressive lacustrine sequence exposed in the southwestern Snake River Plain. This 5 m thick lensoid sequence crops out over an 80 km2 ...
Gas buildup in Lake Nyos, Cameroon: The recharge process and its consequences
(Elsevier, 1993-05)
The gases dissolved in Lake Nyos, Cameroon, were quantified recently (December 1989 and September 1990) by two independent techniques: in-situ measurements using a newly designed probe and laboratory analyses of samples ...
Intestinal contents of a late Pleistocene mastodont from midcontinental north America
(Elsevier, 1991-07)
Salvage excavations of a nearly complete and remarkably well-preserved skeleton of an American mastodont (Mammut americanum) in Licking County, Ohio, yielded a discrete, cylindrical mass of plant material found in association ...
An algorithm for clustering profile data and its application to near-surface ice content data from wet coastal tundra soils near Barrow, Alaska
(Kluwer Academic Publishers-Plenum Publishers; Plenum Publishing Corporation ; Springer Science+Business Media, 1984-02)
An algorithm to cluster profile data into groups that minimize the sum of the intra-group variances was applied to near-surface soil ice content data collected near Barrow, Alaska, in wet tundra terrain. When the algorithm ...
Some information theoretic optimality criteria for general classification
(Kluwer Academic Publishers-Plenum Publishers; Plenum Publishing Corporation ; Springer Science+Business Media, 1971-06)
Sr isotopic composition of hydroxyapatite from recent and fossil salmon: the record of lifetime migration and diagenesis
(Elsevier, 1992-02)
By comparing the Sr isotopic composition of migratory fossil salmon, which lived in the ocean but died in continental regions, to the well established marine Sr isotopic record, the age of the continental deposit could be ...