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The Sulphur Spring stage and its place in New World prehistory

The Sulphur Spring stage and its place in New World prehistory
Arizona ; Datation radiocarbone ; Etats-Unis ; Géographie historique ; Histoire de la géographie ; Préhistoire ; Site archéologique ; Sulphur Spring stage ; Whitewater Draw
Radiocarbon dates from archaeological sites in Whitewater Draw, Arizona, place the Sulphur Spring stage of the Cochise Culture between 8000 and 10,000 yr B.P., and possibly back to 10,400 yr B.P. Geoarchaeological investigations of Whitewater Draw
do not substantiate an earlier claim that Sulphur Spring stage ground stone artifacts are associated with extinct megafauna, nor the hypothesis that Sulphur Spring stage artifacts are specialized plant processing tools of the Clovis Culture.

Speleogenesis of an exhumed hydrothermal sulphuric acid karst in Cambrian carbonates (Mount San Giovanni, Sardinia)

Speleogenesis of an exhumed hydrothermal sulphuric acid karst in Cambrian carbonates (Mount San Giovanni, Sardinia)
in the Carboniferous, when most of the large voids still accessible today were formed. A key role in carbonate dissolution was played by sulphuric acid formed by the oxidation of the polymetallic ores present in the rocks since the Cambrian. During the Quaternary
stage.

An attempt to model outflow from the Werenskiold Glacier basin (SW Spitsbergen)

Arctic Region ; Autumn ; Discharge ; Flood ; Glacial flow ; Glacier ; Glaciology ; Hydrology ; Model ; Polar region ; Regression analysis ; Spitsbergen ; Spring ; Svalbard
The lack of data as well as technical problems with water stage recording in Glacier River during polar spring and autumn (river freezing) are the main reasons for attempts to obtain the model of outflow from the Werenskiold Glacier basin
. For the spring hydrological season the simple regression Q=f(ta) with hourly discharges and air temperatures was used. The autumn-winter hydrological season was approximated with Maillet's curve.

The 2008 spring Midwest floods : a signal of changing climatic conditions?

The 2008 spring Midwest floods : a signal of changing climatic conditions?
Climatic change ; Flood ; Heavy rain ; Indiana ; Iowa ; Midwest ; Peak discharge ; Precipitation ; Rainfall regime ; Spring (season) ; Stream ; Synoptic climatology ; United States of America ; Weather type ; Wisconsin
The AA. examine historical records of river discharge rates and stage levels at 16 gauging stations in Iowa, southern Wisconsin, and southern Indiana to assess the severity and impact of flooding on local river systems and place the event
in historical perspective. Discharge rates were higher than expected in May, peaking in June when magnitudes often reached record levels; estimated return periods for June often exceeded between 100 and 200 years on rivers in these areas. Daily flood stage

Des villes comme Alice... Conflits de races, conflit de classes en Australie aborigène

(1950-1980) ; Aborigènes ; Accès au logement ; Alice Springs ; Australie ; Discrimination raciale ; Géographie de l'Océanie ; Habitat urbain ; Logement ; Lutte des classes ; Législation ; Minorité ; Northern Territory ; Population urbaine ; Société
. In each stage, ethnic discrimination has played an important role in justifying economic exploitation, but since 1950 the process has begun to involve a deeper class conflict. The A. examines the evolution of such relationships in the setting of Alice
Springs, one the major urban centres of Aboriginal Australia.

Mechanism of salt contamination of karstic springs related to the Messinian Deep Stage. The speleological model of Port Miou (France)

Mechanism of salt contamination of karstic springs related to the Messinian Deep Stage. The speleological model of Port Miou (France)
Bouches-du-Rhône ; Drainage network ; France ; Geochemistry ; Karst ; Marseille ; Model ; Provence-Alpes-Côte d'Azur ; Salinity ; Sea level ; Speleology ; Spring ; Submarine canyon ; Underground water
of the brackish spring by construction of a dam have failed.

A study on neogene volcanic landforms of the middle Tanlu fault belt

and spring-spilling type. Furthermore, the courses of development of volcanic landforms are divided into 3 stages according to the form and strength of volcanic activities.

Recent studies on recreational geography in Japan

Those works can be categorized into studies of spatial organization, studies of landscape formation and other studies. The studies of landscape formation have been concentrated on the hot spring and minshuku settlements because Japanese people
visited these places most often. The fields of landscape evaluation, recreational resource perception, and environmental preservation are in their early stages. Japanese recreational geography lacks also applicational studies oriented towards regional

On problems of petroleum towns.

with exploration work. Petroleum towns usually spring up within a short time. They have simple functions and do not provide a variety of occupation for workers'families who have to turn to agriculture. Population growth shows definite stages. These characteristics

Spatial differentiation of chemical denudation in the Bystrzanka flysch catchment (West Carpathians)

of salts is carried away during spring-summer high water stages. (d'après l'A.).
the principal components are sulphates and then carbonates. In the both areas average salts concentration in soil waters is lower than in bedrock waters. The quantity of material removed in solution is closely dependant on high water stages. The highest bulk

Agrometeorologiceskoe obosnovanie fitomelioracii pastbisc pustynnoj zony Kazahstana Bases agrométéorologiques de l'amélioration de la végétation des pâturages dans la zone désertique du Kazakhstan

Limits of minimum spring and maximum summer temperatures causing sprouts' destruction are determined. Climatic conditions favourable for juvenile plants' vitability are assessed. Agroclimatic peculiarities of southern regions permit to carry out
phytomeliorative measures in 10-30 % of years only at favourable at atmospheric and soil moistening. The losses caused by negative climatic conditions influence on the early stages of phytomeliorants' development are calculated. - (L'A.).

Tematski zemljevidi in avtorska pravica

Producing of thematic maps is usually combined with three different stages : scientific stage, scientific-artistic stage, and technological stage, therefore on various stages several types of authors are involved. Only good knowledge about
these stages enables accurate evaluation of scientistic and esthetic worth of thematic maps and determination of autorship of thematical maps. Copyright of each type of the authors of thematical maps in Slovenia is secured on different ways by Slovene copyright

The witwatersrand: structure, stage and strategy

The witwatersrand: structure, stage and strategy

South Carolina interglacial sites and stage 5 sea levels

South Carolina interglacial sites and stage 5 sea levels
The amino acid correlations with U-series coral dates in South Carolina, Bermuda, and the Mediterranean argue that the classical Canepatch and its Horry Clay date from isotope stage 5. The Canepatch shows the double marine transgression visible
in many stage 5 deposits.

La montée des stages pour les jeunes

La montée des stages pour les jeunes
Education ; Formation professionnelle ; France ; Géographie de l'Europe ; Jeunes ; Nord-Pas-de-Calais ; Stage de formation
Depuis 1984 des mesures ont facilité l'embauche de stagiaires aussi bien dans le secteur public (TUC) que dans le secteur privé (SIVP, Stage d'insertion à la vie professionnelle). Ces mesures ont eu un impact important dans la région. - (AG)

A new correlation of the glacial moraines in the Southern Apennines, Italy

Three stages can be identified following the maximum expansion. The first two correspond respectively to the First and Second Apenninic Stage as described by Federici (1979), while the third may belong to the latter or to the Third Apenninic Stage
. It is likely that these two stages correspond respectively to the Oldest and the Older Dryas| the third could correspond to the Younger Dryas.

Pleistocene stages in the Middle Dnieper basin by evidence of spore-pollen analysis of loesses in Lithology and stratigraphy of loess and paleosols.

Pleistocene stages in the Middle Dnieper basin by evidence of spore-pollen analysis of loesses in Lithology and stratigraphy of loess and paleosols.
Sudden alternations of warm and humid climatic stages with cool and arid ones are observed. The types of vegetation cover are indicated for stages and areas. (DLO).

Dissolution in a variably confined carbonate platform : effects of allogenic runoff, hydraulic damming of groundwater inputs, and surface–groundwater exchange at the basin scale

Florida affected locations, magnitudes and processes of dissolution during 2005–2007, a period with extreme ranges of discharge. During intense rain events, runoff from the confining unit increased river stage above groundwater heads in unconfined portions
of the platform, hydraulically damming inputs of groundwater along a 200 km reach of river. Hydraulic damming allowed allogenic runoff to fill the entire river channel and flow into the aquifer via reversing springs. Storage of runoff in the aquifer decreased peak

Influence of varying tidal prism on hydrodynamics and sedimentary processes in a hypertidal salt marsh creek

This research considers acoustic Doppler velocimeter (ADV) and optical backscatter sensor (OBS) data from a sheltered tidal creek in the Minas Basin, for analysis of tidal characteristics in a hypertidal creek environment over spring and neap tidal
. This study demonstrates that tides which peak around the bankfull level show reduced early ebb stage turbulence and flow velocity and encourage an extended depositional period. The dynamics of marshfull tides may be responsible for the maximum sediment

A model of channel response in disturbed alluvial channels

The adjustment of channel geometry and phases of channel evolution are characterized by six process-oriented stages of morphologic development : premodified, constructed, degradation, threshold, aggradation, and restabilization. Downcutting and toe
removal during the degradation stage causes bank failure by mass wasking when the critical height and angle of the bank material is exceeded (threshold stage). Channel widening continues through the aggradation stage as the slough line develops
as an initial site of lower-bank stability. Alternate channel bars form during the restabilization stage and represent incipient meandering of the channel.

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