Terrace stratigraphy in the Tunica Hills of Louisiana
The age and number of important fossil-producing late Pleistocene terraces in the Tunica Hills have recently become quite controversial. One hypothesis holds that only a single loess-mantled Farmdalian terrace flanks the streams in this area
. The other maintains that there are two terraces. The youngest is considered essentially Holocene in age while the older is Sangamon in age. Radiometric and stratigraphic evidence collected for this study indicates that there are two terraces. The youngest
TerEx Toolbox for semi-automated selection of fluvial terrace and floodplain features from lidar
Automated mapping ; Digital elevation model ; Floodplain ; Fluvial processes ; Fluvial terrace ; LiDAR ; Minnesota ; United States of America
terrace and floodplain surfaces. They validate the tool in 2 locations where terrace maps were previously developed via manual digitization from lidar and extensive field mapping campaigns. The tool is also tested on 6 different types of rivers to provide
examples of starting selection parameters. Generally, the tool provides a high quality draft map of terrace and floodplain surfaces. The AA. find that the tool functions best in catchments where the terraces are spatially extensive, with distinct
differences between the terrace and floodplain. The most challenging environments for semi-automated terrace and floodplain mapping include steep catchments with dense riparian vegetation, and very small terraces. They then apply the tool to map terraces
and floodplains in the Root River watershed, southeastern Minnesota and generate exceedance plots for terrace heights. These plots provide a first pass analysis to indicate the tributaries and reaches of the river where terraces constitute a significant source
Austria ; Cartography ; Dating ; Fluvial terrace ; Germany ; Pleistocene ; Terrace
of fluvial terraces is developed along the Inn. These terraces, which date from the late Pleistocene to the early Holocene, are incised in the Wüum floodpain, the lower terrace. The mapping of the fluvial terraces was the first main goal of this thesis
. A second aim was to establish numerical ages for the terraces in question. A third goal was to correlate the phases of geomorphodynamic activity in the Inn valley, of which the fluvial terraces give evidence, with those that were dated in other catchments
The relationship between age and soil development index values in a fluvial terrace sequence and, more precisely, their distribution with regards profile depth, is the main purpose of this study.
Parent material controlled subsoil weathering in a chronosequence, the Allier terraces, Limagne rift valley, France
Allier ; Chronosequence ; Fluvial terrace ; France ; Geochemistry ; Lithology ; Massif Central ; Model ; Weathering
The goal of this paper is to determine and quantify the effect of the original sediment composition on the actual terrace sand composition in the Allier chronosequence. Further it is tried to determine the control of parent material on subsoil
Cryoplanation terraces. A brief review and some remarks
Asian part of Russia ; Cold area ; Gelifraction ; Geomorphogenesis ; Periglacial features ; Permafrost ; Sakha ; Slope ; Terrace ; Weathering
This paper presents a brief review of contemporary knowledge concerning the development of cryoplanation terraces and their genetic equivalents - the cryoplanation summit flats. It is based mainly on results from Yakutia, where under present-day
Detailed heavy-minerals analysis allowed to discover the influence of two volcanic Eifel eruptions. Green acicular augite grains are typical for the early Rissian Caberg-Pietersem and end Rissian Eisden-Lanklaar Meuse terraces. - (L'A.).
Author examines the most widely investigated topic of fluvial geomorphology in Hungary, the formation of river terraces. He starts with an overview about the basic literature in this theme, which is followed by the theoretical results
Terrace pediments in Makhtesh Ramon, central Negev, Israel
Arid area ; Base level ; Dating ; Desert ; Duricrust ; Fluvial terrace ; Geomorphogenesis ; Israel ; Negev ; Pediment ; Stratigraphy ; Thermoluminescence
The aims of this work are to characterize the morphostratigraphy of pediments in Makhtesh Ramon, Negev Desert; define the relations (synchronous or asynchronous) between fluvial terraces and pediment terrace staircases as a means of correlating time
The study aims to review the causes of river terrace evolution, as well as, its chronology and the alternating mechanism that occurred during formation periods, called terminations. Based on data collected and published during decades of terrace
research the A. attempts to outline the evolution and chronology of Hungary’s terrace system. - (AM)
This article presents the results of a geomorphological analysis of localities of Quaternary river terraces along the Želivka River and its historical-genetic interpretation in light of the formation of the Sázava terrace system. In addition
, the morphogenetic characteristics of the Želivka Valley are presented and the fluvial sediments and terrace system of its river are described, including a chronostratigraphic correlation with other river terraces of the Bohemian Massif. - (EN)
During February and March 1982, field work was undertaken along the Gulf of Aden coast of Somalia, between Galweda and Elayu. Marine terraces were examined in the field and later were mapped using aerial photographs. Corals were collected from
marine terraces for uranium-series dating. This paper reports on the results of this research.
Soil development, relative dating, and correlation of late Quaternary marine terraces in Southwestern Oregon
Coastal environment ; Dating ; Marine terrace ; Oregon ; Pedogenesis ; Quaternary ; Relative age ; Soil ; United States
The purposes of this paper are to describe soil development on marine terraces in two areas, Cape Blanco and Cape Arago, and to assess the utility of soils in relative dating and correlating marine terraces sequences in coastal Oregon.
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
This study attempts to apply pedology to resolve the factors controlling the geomorphic evolution of terraces in the Pakua tableland. In this study, the weighted mean profile development index (PDI or WPDI) and the amounts of Fe and Al in soils
are examined and compared with those obtained in other studies to estimate soils and/or river terrace ages in the Pakua tableland. Moreover, landscape evolution and active deformation of the study area are discussed based on the pedogenic processes.
Quaternary marine terraces on the southern side of the Gibraltar strait and on the northen Atlantic Coast of Marocco : lithostratigraphy, provenance and drainage patterns.
New lithostratigraphic data have been collected from stratigraphic sections in Quaternary marine terraces located along the northen Atlantic and southern Gibraltar Strait coasts (Marocco). Petrographic analyses of detrital modes of the arenites