The AA first describe the terrace staircase, its composition, origin and preservation. The terrace sequence is then placed within a geochronological framework using the available age estimates. Finally, they compare this time-constrained sequence
Almería ; Arid area ; Calcrete ; Fluvial terrace ; Geochronology ; Quaternary ; Spain ; Th/U dating
Immature and mature calcretes from an alluvial terrace sequence in the Sorbas basin were dated by the U-series isochron technique. By using this technique to date calcretes that have formed during terrace aggradation and at the terrace surface after
terrace abandonment it is possible not only to date the timing of terrace aggradation but also to constrain the age at which the river switched from aggradation to incision. This approach, therefore, constrains the timing of changes in fluvial processes
more reliably than any currently used geochronological procedure and is appropriate for dating terrace sequences in dryland regions worlwide, wherever calcrete horizons are present.
Correlation of fluvial terraces within the Hikurangi Margin, New Zealand : implications for climate and baselevel controls
Base level ; C 14 dating ; Fluvial terrace ; Loess ; New Zealand ; North Island ; Palaeo-environment ; Palaeoclimate ; Stratigraphic correlation ; Tephrochronology ; Watershed
A correlation of fluvial terraces is presented for 8 non-glacial catchments of the eastern North Island, New zealand, within the actively uplifting Hikurangi Margin. Using a combination of loess and tephra coverbed stratigraphy, and radiocarbon
and OSL dating of fluvial deposits and loess coverbeds, the AA. demonstrate correlation of 4 fill terraces, T1-T4. The AA. discuss the mechanisms of terrace formation, with particular attention to the relative effects of climate and baselevel control.
To understand whether soils on the same geomorphic surface have similar properties, this study examines the morphology of soils developed on the 30-kyr-old Taoyuan Terrace. Relationships among soil morphology, variations in the groundwater table
for using the degree of lateritization as an index of terrace correlation.
The alluvial deposits which fill the low Tiber River Valley show a morphology characterized by wide discontinuous terraces raising up till more than 200 m above the thalweg. Moreover the inner borders of all the terraces belonging to both the valley
floors and the valley sides show elevation values which are recurrent and identical to elevation values of upper Pleistocene marine terraces scattered over all the world. From these results one may claim that terraces of the Tiber Valley, here discussed
Alluvium ; Floodplain ; Fluvial terrace ; Geomorphology ; Holocene ; Iowa ; Pleistocene ; Quaternary ; Sedimentology ; Soil ; Stratigraphy ; United States of America ; Valley
The AA. investigated the alluvial stratigraphy, soils, and geomorphology along a section of the lower Little Cedar River to aid in understanding the processes forming this landform region. They used terrace- and floodplain surface height above
the Little Cedar River, soil development, sedimentological characteristics, and stone lines to distinguish alluvial units and landforms. Three Pleistocene surfaces were mapped in the valley, including two terraces and an erosion footslope. Holocene alluvial
units identified include three terraces and the modern floodplain. Elsewhere in the Midwest, these units have been described as the Deforest Formation.
Appalachian Mountains ; Cenozoic ; Dating ; Downcutting ; Fluvial terrace ; Geology ; Geomorphology ; Landscape dynamics ; Palaeogeography ; Terrace ; United States of America ; Virginia
Brazil ; Channel geometry ; Fault ; Fluvial terrace ; Longitudinal section ; Model ; Neotectonics ; Paraná ; Stream ; Structural geomorphology ; Tropical zone
Using terrace mapping, sediment composition, C 14 and thermoluminescence dating, and morphostructural analysis, this paper presents the composed longitudinal profile and the structural analysis of the lower course of the Ivinhema River. The tectonic
Aeolian features ; C 14 dating ; Dune ; Fluvial terrace ; Holocene ; Oklahoma ; Quaternary ; Soil ; Stratigraphy ; Thermoluminescence ; United States of America ; Valley
activation periods recorded in ridge dune deposist as well as the spatial variability of aeolian processes during active aeolian episodes. This study shows that aeolian landforms superimposed on fluvial terraces adjacent to the Cimarron River, in southeastern
Taking the loess hilly-gully region as a case study, this paper summarizes the basic characteristics of relieving and de-farming (RD) and rebuilding terrace and de-farming (RTD) modes, calculates the sizes of de-farming slope farmland, rebuilt
terraces, enlarged garden plots and restored vegetation, and compares the differences of two modes of de-farming area, ecological reestablishment index, investment demand amount and benefits. The results show that RTD mode has many advantages, including
Glacier advances east of the Southern Andes between the Last Glacial Maximum and 5,000 BP compared with lake terraces of the endorrheic Lago Cardiel (49°S, Patagonia, Argentina)
Field, micromorphological, pollen, whole soil geochemistry (XRF), and stable isotope geochemical methods were used to evaluate the latest Pleistocene to Holocene climate record from a floodplain-terrace system (floodplain soil and underlying
Park (GNP). Conifers were found to be nonrandom spatial associates of 3 shelter types : boulders, terrace risers and combination shelters. The results indicate that conifer establishment and survival in this extreme mountain environment is connected
: 1997 lahar, 2001 lahar, margins, and terraces at the channel's bottom. Cluster analysis and the Sorensen index were used to determine the floristic affinity of these lahars. The Principal Component Analysis used to identify other explanatory factors