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Portail d'information géographique

Résultats de la recherche (21 résultats)

Pertinence du mot Barren dans le bouclier canadien in La Terre et les Hommes. Mélanges offerts à Max Derruau.

Pertinence du mot Barren dans le bouclier canadien in La Terre et les Hommes. Mélanges offerts à Max Derruau.
Barren ; Biogéographie ; Canada ; Généralités sur la géographie ; Géographie historique ; Keewatin-Mackenzie ; Northwest Territories ; Terminologie ; Zone froide

Evidence for Late-Pleistocene thermokarst in the New Jersey Pine Barrens (latitude 39°N), Eastern USA

Evidence for Late-Pleistocene thermokarst in the New Jersey Pine Barrens (latitude 39°N), Eastern USA
Complex post-sedimentary deformation structures, extending to depths of 3-4 m below the surface, are present in the near-surface gravel of the Pine Barrens of southern New Jersey. These structures are thought to have formed when Late-Pleistocene

Evidence for Late-Pleistocene permafrost in the New Jersey Pine Barrens (latitude 39°N), eastern USA

Evidence for Late-Pleistocene permafrost in the New Jersey Pine Barrens (latitude 39°N), eastern USA
Relict sand wedges, up to 2.5 m deep and 0.4 m wide, are present in the Pine Barrens of southern New Jersey. They indicate the previous existence of permafrost. The wedges are composed predominantly of sand that shows evidence of wind transport

''Altogether barren, peculiarly romantic'' : the sandstone lands around Sydney in Environment and development in Australia.

''Altogether barren, peculiarly romantic'' : the sandstone lands around Sydney in Environment and development in Australia.

A Tolnai-dombsag genetikai talajtipusai és talajlepusztulasa. (Genetic soil types and soil erosion in the Tolna Hills)

The loess covered and minutely dissected hilly region of high relief is described by various soil types (brown forest soils, chernozem brown soils, chernozems, earthy barren grounds, hydromorphous soils). Surfaces are classified according

Land-use change in the Atlantic coastal Pine Barrens ecoregion

Land-use change in the Atlantic coastal Pine Barrens ecoregion
Afforestation ; Demographic change ; Eastern United States ; Ecoregion ; Land use ; Land utilisation ; Pine barren ; United States of America ; Vegetation dynamics

Paanajärvi - Oulanka valley - a pathway across the northern taiga

are meant to afford a background to the importance of the Paanajärvi - Oulanka region as an immigration route for biota across the vast barrens of the northern taiga. A short vocabulary of some important Finnish geographical terms is presented.

The icelandic rofabard soil erosion features

Soil erosion and desertification are severe problems in Iceland. One of the most distinctive erosion forms in Iceland is an erosion escarpment, termed robafard in Icelandic, where andosols are being truncated from the surface and barren desert

Cold-climate origin of the enclosed depressions and wetlands (spungs) of the Pine Barrens, southern New Jersey, USA

Cold-climate origin of the enclosed depressions and wetlands (spungs) of the Pine Barrens, southern New Jersey, USA

Rational utilization of mountain soils in southeast Qinghai-Xizang (Tibetan) Plateau

to be instable. So rational cutting and forest conservation, barren mountain afforestation, returning the cultivated land on steep slopes to forest, controlled grazing, and soil amelioration constitute important means for rational use of soil resources

Gully headcuts as sediment sources on the Njemps Flats and initial low-cost gully control measures

recession is high runoff discharge on barren smooth slopes. Preliminary results of grass seeding tests in the microcatchments are also presented.

Medves-vidéki riolittufák eróziós formakincse

the beginning of the Ottnagien age are very typical at this area. These „tuffs” are mainly ignimbrites and came into being due to heavy but episodic, 2-4 times repeated successive volcanic eruptions. The barren rhyolite tuff surfaces are optimal for the study

A chronology of Late-Pleistocene permafrost events in southern New Jersey

Frost fissures, filled with wind-abraded sand and mineral soil, and numerous small-scale non-diastrophic deformations, occur in the near-surface sediments of the Pine Barrens of southern New Jersey. The fissures are the result of thermal-contraction

L'influence du contexte urbain et social sur les comportements des femmes lors de leur grossesse et après leur accouchement, en périphérie de Vientiane (RDP Lao)

BARENNES, H.

A computer program (WDTSRP) designed for computation of sand drift potential (DP) and plotting sand roses

Wind Data Tabulator and Sand Rose Plotter (WDTSRP) is an interactive developed computer program accessible for estimating sand transport potential by winds in barren sandy deserts. The Fryberger (1979) formula for determining sand drift potential

A climatic basis for the study of convergence of vegetation structure in mediterranean Australia and southern Africa

uniques d'un continent à l'autre, à cause de différences de latitude, altitude, température de l'Océan. Les climats les plus semblables sont rencontrés dans les Barrens (Australie de l'W.) et la Caledon Coast (Afrique du S.)| ils sont associés à des formes

Conical sandstone landforms cored with clastic pipes in Glen Canyon National Recreation Area, southeastern Utah

Clusters of conical sandstone landforms, many with summit weathering pits, have developed on barren outcrops of the Jurassic Entrada Sandstone in Glen Canyon National Recreation Area. The conical landforms have developed on cylindrical bodies

Land cover changes in the rural-urban interaction of Xi'an region using Landsat TM/ETM data

Landsat ETM/TM data and an artificial neural network (ANN) were applied to analyse the expansion of the city of Xi'an and land use/cover change of its surrounding area between 2000 and 2003. Supervised classification and normalized difference barren

Holocene environmental change and vegetation contraction in the Sonoran Desert

The AA. investigate 2 kinds of distinct micro-topographic features that commonly occur on broad, planar surfaces of barren desert pavements in the Sonoran Desert : plant scar mounds and plant scar depressions. Eidence is presented that both features

Aeolian activity at a giant sandstone weathering pit in arid south-central Utah

Aeolian abrasional, depositional and deflational features indicate exceptionally strong southwesterly winds in a giant sandstone weathering pit in Grand Staircase Escalante Monument. This pit has developed near the summit of a broad, barren high