Age constraints on the Duck Ponds and Limeburner's Point mammalian faunas based on magnetic polarity stratigraphy in the Geelong Area (Victoria), Australia
This study reports on the magnetic polarity stratigraphy developed in the Geelong area and the age of the Duck Ponds and Limeburner's Point local faunas. These age determinations enhance the biostratigraphic importance of both local faunas
Age, origin and significance of the raised gravel barrier at Church Bay, Rathlin Island, County Antrim
This paper discusses the implications of a recent examination of the raised gravel beach on Rathlin Island, immediately east and south of Church Bay. Carbon-14 dating indicates a late-glacial age for the beach, evidence that is hard to reconcile
Timing of Late Quaternary glaciations in the western United States based on the age of loess on the eastern Snake River plain, Idaho
The AA. report five thermoluminescence (TL) and two radiocarbon age estimates from the eastern Snake River Plain, within the boundary of the Idaho National Engineering Laboratory, that provide new insight on the chronology of loess deposition
Radiocarbon ages from two submerged strandline features in the western Gulf of Maine and a sea-level curve for the northeastern Massachusetts coastal region
New radiocarbon dates provide ags for two submerged strandline features of the Massachusetts inner shelf. These ags provide limited control on a relative sea-level (RSL) curve for the late Wisconsinan and Holocene. Rapid changes of RSL around 12,000
In the Río Mendoza valley, five Pleistocene drifts and one Holocene drift are distinguished by multiple relative-age criteria, including surface-rock weathering, development of rock varnish, moraine morphology, soil profile development
, and stratigraphic relationships. Several absolute ages suggest a preliminary chronology.
Avalanche ; Forecast ; Greenhouse effect ; Lichenometry ; Little ice age ; Mass movement ; Model ; Natural hazards ; Norway ; Quaternary ; Snow
The age frequency of surface boulders on 12 avalanche boulder-ramparts in upper Jostedalen, southern Norway, was investigated using the size-frequency since AD 1325 on lichen-size-frequency distributions. The results suggest that maximum avalanche
activity occurred during the 19th century, after the peak of the Little Ice Age. Close agreement between the records of snow avalanches and debris flows suggests that both reflect periods of high winter snowfall and rapid spring melting rather than low
Factors affecting 14C ages of lacustrine carbonates : timing and duration of the Last Highstand Lake in the Lahontan Basin
remained closed systems with respect to the isotopes of carbon. Based on these determinations, the most reliable of the carbonate 14C ages are used to calculate carbonate accumulation rates. The accumulation rates then are applied to the measured thickness
Six step sequential extraction was used to determine the different distribution of Ag, Be and Mo in the individual chemical phases of the Labe sediments. The largest amounts of Ag, Be and Mo of anthropogenic origin are found in the sediments
Within the context of the new age control, the purposes of this paper are to: 1) identify, map and correlate fluvial terraces along the lower Susquehanna River; 2) assign ages to the terraces by downstream correlation to the fluvial stratigraphic
The purpose of this paper is to describe the stratigraphy, distribution, and age of the fluvial sediments that underlie the youngest regionally extensive terrace along several rivers in the central Oregon Coast Range. The 14C age determinations
This paper presents an initial attempt to quantify the progressive development of varnish coats over time by measuring the amount of Mn accumulated in varnish collected from geomorphic surfaces of different ages. The data demonstrate that rock
varnish can show significant spatial variation in degree of development on geomorphic surfaces of similar age, and imply that collecting varnish as old as a geomorphic surface may be difficult on surfaces as young as late Pleistocene.