Mass movement of mancos shale crust near Caineville, Utah : a 30-year record
This study was designed to quantify rates of mass movement of the surficial material on the Mancos Shale badland, over a 30-year period, and determine what effects slope position, angle, and aspect had on the rates of mass movement. About two-thirds
Wind erosion of Mancos Shale badland ridges by sudden drops in pressure
One process of erosion of Mancos Shale badlands near Hanksville, Utah, appears to be caused by nearly instantaneous drops in air pressure accompanying gusts of wind. A series of sharp-crested bedrock ridges trend nearly perpendicular to the strong
, gusty southwesterly winds that precede cold fronts passing through the area. Soil susceptible to this type of erosion consist of polygonally cracked surface crust averaging 1.2 cm thick overlying a porous subsoil of silt-sized shale chips. The arid
Science and society: Nathaniel S. Shaler and racial ideology
Bibliographie ; Etats-Unis ; Histoire de la géographie ; Histoire des idées ; Idéologie ; Indiens ; Juifs ; Noirs américains ; Racisme ; Shaler (N. S.) ; Siècle 19
Les bases scientifiques et l'idéologie raciste de Shaler: présupposés biologiques, anthropométrie, histoire des Teutons, influence géographique. Ses idées sur les Noirs américains, les Amerindiens, les Juifs, les paysans européens. Ses solutions
Probing deep weathering in the Shale Hills Critical Zone Observatory, Pennsylvania (USA) : the hypothesis of nested chemical reaction fronts in the subsurface
Carbonate ; Clay ; Geochemistry ; Pennsylvania ; Shale ; Sounding ; United States of America ; Weathering
To determine such depths, cuttings of Rose Hill shale were investigated from one borehole from the ridge and four boreholes from the valley at the Susquehanna Shale Hills Observatory (SSHO). It is shown that carbonate depletion coincides
The Queenston Formation : shale dominated, mixed terrigenous-carbonate deposits of Upper Ordovician, semiarid, muddy shores in Ontario, Canada
Etude stratigraphique et paléogéographique de la Formation de Queenston, de l'Ordovicien supérieur. Dans l'extrême ouest de l'Ontario, la portion supérieure de la formation est composée principalement de shale rouge, et localement mise en évidence
de chenaux comblés de shale. Ce shale fut déposé en milieu paralique, et ses strates sont tronquées par une discordance qui sépare les unités de l'Ordovicien et du Silurien dans cette région. Ce dernier événement pourrait être apparenté à une baisse
differences in the processes of flow concentration on shale and sandstone slopes. Flow concentration and rill initiation apparently will not occur on sandstone slopes which lack a shale cap. Once rills have been initiated, they will continue to develop even
if the conditions necessary for their initiation are no longer fulfilled. In the badlands the relationship is exemplified by the continued development of rills on sandstones slopes even after capping shale units have disappeared.
Flow behaviour and runout modelling of a complex debris flow in a clay-shale basin
On the Faucon stream (South French Alps), representative of clay-shale basins, results of various rheological tests and numerical experiments are presented and discussed. The calibration of the model was undertaken using the results of both
In the following section it shall be described to what extent external constraints and internal decision-making processes of the companies involved in both sectors were interrelated to each other, further it shall be demonstrated to what extent
The poor shall inherit the earth: issues of environmental quality and Third World development in Environmental quality-A relevant concern for the 1980s.
Patterns in the aggregate stability of Mancos Shale derived soils
Salt and sediment contributions to the Colorado River and its tributaries pose economic and environmental concerns for the United States and Mexico. Land use decisions promoting the aggregation of Mancos Shale derived soils are one way to reduce
the transportation of salts and sediments to water resources. The AA. used a simple field test of soil aggregate stability to determine the site characteristics influencing the soil stability of sedimentary marine shale in the Gunnison Gorge National Conservation
The intention of the decree is that land shall be held in trust and administered for the use and common benefit of all Nigerians. But public ownership could result in protecting the interests of the privileged rather than benefiting the landless
A brief description is given of a small klippe of Givetian limestone which has been found lying on Frasnian shales near the southern border of the Famenne. In order to aid further mapping, descriptions of the local Givetian and Frasnian sequence