Oldlands are complex surfaces of low relief preserved on Precambrian shields and cratons and Paleozoic massifs. Interpretation of their character and age is difficult, but as a consequence of its particular location and of conceptual developments
, much of the Australian Craton is now susceptible to analysis in terms of exhumation, etching, and multistage development. Exhumed surfaces of many ages are recorded.
Application of relative-age dating methods to openwork debris flow deposits in the Cederberg Mountains, Western Cape, South Africa
The results of a pilot study to provide relative ages for openwork debris flow deposits in a part of the Cederberg mountains are presented. Field techniques used included rock hardness assessment using a Schmidt hammer, lichenometry
Stratigraphy, soils, and age relationships of mima-like mounds, Laramie Basin, Wyoming
documents the stratigraphic character of 5 inactive mounds and one active mound exposed in natural and artificial cuts on Harmony and Stock Farm surfaces. It discusses the relevance of the groundwater vortex hypothesis and mound-age relationships based
Mid-Pleistocene cosmogenic minimum-age limits for pre-Wisconsinan glacial surfaces in southwestern Minnesota and southern Baffin Island : a multiple nuclide approach
, including significant periods of partial or complete shielding from cosmic rays. The data demonstrate that exposure ages and erosion rates calculated from single nuclides can underestimate surface stability dramatically because any intermittent burial
Use of cosmogenic 35S for comparing ages of water from three alpine-subalpine basins in the Colorado Front Range
time of water. In this paper, the effect of basin morphology on the release of snowmelt water to surface streams is explored. The activity of 35S is used to compare the estimated ages of water exiting 3 small alpine-subalpine basins in north-central
This paper reports on relative and absolute age estimates on a sequence of Holocene moraines on the floor of the Jardalen cirque complex near Sandane, western Norway, based predominantly upon simple and inexpensive field criteria. The available soil
development rates for this part of Norway are used to calculate moraine ages and to construct an absolute chronology for the moraine sequence, which is compared to a previously published lichenometric chronology for the same cirque basin.
Frequentslope failures of the forereef dropoff occur in living coral reefs on the island of Bonaire in the southern Caribbean. Topographic profiles of 10 sites were taken perpendicular to shore, followed by an estimation of coral ages along
the topographic profiles. Comparisons of coral age and adjacent slope angle indicated that the steeper slopes are older and that mass failure of the slope reduces the steepness of the forereef front and destroys the coral community along the disturbed slope
Europe ; Geochronology ; Glacial features ; Glacier fluctuation ; Glacier mass balance ; Lateral moraine ; Little ice age ; Norway ; Palaeo-environment ; Palaeoclimate ; Terminology
Lateral moraines as typical elements of early-recent (Little Ice Age) glacier forelands in the eastern Alps and West-/Central Norway are studied. Their morphology and genesis is compared and different types of lateral moraines are classified. Those
The aim of this paper is to use marine terrace age and distribution to identify the pattern of the late Quaternary deformation in the Crescent City coastal plain. The AA. determined how many marine terraces make up the Crescent City coastal plain
, characterized the soils developed on their surfaces, investigated the cover stratigraphy and the buried bedrock topography underlying the terraces, and estimated terrace ages.
In a detailed study of soils in the Wind River Range and Wind River Basin, characteristics of near-surface horizons do not follow age trends. However, the underlying carbonate-bearing horizons do have age-related characteristics. This soil paradox
This paper presents that the mean age of phytoliths and soil organic matter (SOM) in the uppermost 2.6 m of a latosol in central southern Brazil increases with depth in a regular, quantifiable fashion. The mean age of particles at each level results
On the basis of empirical findings and inductive conclusions, the least extent of glaciation during the last ice age can be shown for 2 areas on the southern slopes of the Himalayas in Nepal. For the Rolwaling Himal, the snow line during the last
ice age is calculated at 4000 m asl., i.e., 1500 m below the recent snow line. The last high-glacial snow line in the Kangchenjunga Himal is thought to be at 4350 m asl., the snow line depression here is 1150 m.
The temporal occurence of landslides in an area of the Cantabrian Range during the last 120,000 years is analyzed. An initial relative chronology was established on the basis of aging degree and spatial relationships between landslides and glacial
and fluvial features. 10 landslide classes were thus identified and their chronological limits defined on the basis of 19 C 14 age determinations on fluvial and glacial deposits. The chronological classes identified were compared with existing climate models