similarity between the samples collected from the occurrences. In the environment of both locations some boulders are found composed of quartzite. In the opinion of the author these boulders were very probably transported by floating frozen ice floes. - (AM)
Extensive boulder erosion resulting from a range fire on the type-pinedale moraines, Fremont Lake, Wyoming
In July 1988, the Flatfish Range Fire burned over the type-Pinedale moraines at Fremont Lake, Wyoming, and caused extensive exfoliation of exposed boulder surfaces. Fire-induced exfoliation may account for differences in boulder size and abundance
on Pinedale and Bull Lake moraines. Surface dating methods using varnish or cosmogenic nuclides may yield exposure ages that are too young if the consequences of ranges fires are not considered when sampling boulder surfaces that are within about 2 m above
Blocs démesurés de l'Europe de l'Ouest: historique, terminologie et hypothèses de mise en place. (Oversized boulders of wester Europe: history, terminology and hypothesis)
The A. presents 2 questions related to the presence of boulders in plain alluvial formations: I: the evolution of the different terms used for boulders in French during the XIXth and XXth centuries| 2: the evolution of all the hypothesis that, from
1660 to nowadays, were put forward to explain the setting of those oversized boulders in alluvial deposits. The term bloc démesuré is predominantly used since 1961 and that the hypothesis favored by the majority of scientists, after 1951
Effects of the Little Ice Age on avalanche boulder tongues in the French Alps (Massif des Ecrins)
Lichens of the subspecies Rhizocarpon geographicum were measured on 25 avalanches boulder tongues in the Massif des Ecrins to elucidate the Little Ice Age history of avalanche activity. According to the results, the avalanche activity
was at a maximum before AD 1650 and between AD 1730 and 1830. The relatively good correspondence between avalanche boulder tongue and glacier behaviour in the Massif des Ecrins to climatic variation which occurred since the Little Ice Age confirms that avalanche
boulder tongues can be viewed as reliable indicators of the activity of certain slopes processes within the periglacial zone.
Boulders of 2 coastal areas (Cape Skalas in southern Lakonia, Peloponnese; Cape Gerogombos on Paliki Peninsula in western Greece were surveyed within their topographical context using a laser scanner in combination with a DGPS. 3D reconstruction
allows the determination of highly accurate volumetric data, as well as the extraction of further parameters, such as elevation above sea level, inclination and distance to the sea for each boulder. The results show that terrestrial laser scanning
the common method in scientific studies on boulder dislocation. The AA. found that volume data based on axes measurements together with density approximations result in a considerable overestimation of the mass of dislocated boulders.
Untersuchungen zur Geomorphologie des jungquartären Vergletscherungsgekietes im Oberlauf des Middle Boulder Creek (Colorado Front Range, Rocky Mountains). (Recherches sur la géomorphologie des régions englacées au quaternaire supérieur dans la
partie amont du Middle Boulder Creek. Colorado Front Range, Rocky Moutains.)
Chronostratigraphie ; Etats-Unis ; Glaciaire ; Glaciation ; Géochronologie ; Géographie de l'Amérique ; Middle Boulder Creek ; Moraine ; Quaternaire zones moyennes ; Rocky Mountains ; Stratigraphie
Les formes glaciaires de la région du cours supérieur du Middle Boulder Creek sont étudiées et datées suivant la chronologie du Quaternaire des Rocky Mountains de Richmond (1965). Des traces des trois plus anciennes glaciations pléistocènes n'ont
pas été trouvées dans la Middle Boulder Valley. Pour le Pléistocène récent et le Postglaciaire, la stratigraphie de Richmond est en principe confirmée. Des découvertes morphologiques montrent que le stade inférieur de la glaciation de Pinedale peut
Slope form and associations with ground boulder cover in arid environments, northeast Jordan
This study examines and quantifies spatial variations in slope profile shape and uses boulders as an index of relative sediment transport, by establishing the degree of clast burial from different plots located at points along the profile. The study
Variable boulder concentrations in drumlins indicating diverse accretionary mechanisms - examples from western Ireland
The presence of the different boulder concentrations within a single drumlin or within drumlins of close proximity is indicative of disparate processes contributing to drumlin formation. Within the local embayment of western Ireland this may reflect
Housing market dynamics under stochastic growth : an application to the housing market in Boulder, Colorado
Boulder ; Colorado ; Coût du logement ; Demande ; Etats-Unis ; Formation des prix ; Logement ; Marché du logement ; Modèle ; Offre ; Promotion immobilière
stochastique du marché régional. Application à la région de Boulder, période 1981-95, caractérisée par une croissance rapide des valeurs immobilières. On note sur le long terme une inélasticité, compte tenu de l'évolution des prix. La réponse des promoteurs est
Biostratigraphic constraints and depositional environment of the Lower Cretaceous (Albian) Boulder Creek Formation, Monkman area, northeastern British Columbia
Résultats de l'étude des carottes d'un forage traversant en entier la Formation de Boulder Creek dans la région de Monkman du nord-est de la Colombie-Britannique. Les échantillons obtenus ont fourni des foraminifères présents dans la Formation
d'Hasler sus-jacente et dans la Formation d'Hulcross sous-jacente, établissant ainsi les bornes de l'âge de la Formation de Boulder Creek entre Albien moyen et Albien tardif.
Urban sustainability and the LEED rating system : case studies on the role of regional characteristics and adaptive reuse in green building in Denver and Boulder, Colorado
Architecture ; Boulder ; Colorado ; Construction urbaine ; Construction verte ; Denver ; Durabilité ; Etats-Unis ; Géographie urbaine ; Lieu ; Relation homme-environnement
Il s'agit d'un système américain de standardisation de bâtiments à haute qualité environnementale. Etude de cas relative à six bâtiments homologués à Denver et Boulder, Colorado. Rôle des caractéristiques régionales et de la réutilisation adaptative
SEM analysis of quartz sand grain surface textures indicates alluvial/colluvial origin of the Quaternary glacial boulder clays at Huangshan (Yellow Mountain), east-central China
Geomorphic features and Pleistocene deposits on Huangshan have been attributed to glaciation. Recent reassessment questions this interpretation. Quartz sand grains from deposits identified as glacial boulder clays were analyzed by scanning electron
microscope for evidence of their sedimentary history. Surface textures found on the boulder-clay grains were compared with those on grains with known sedimentary histories. The similarity with the colluvial grains and the outcrops'structures suggest
A Late Pleistocene intertidal boulder pavement from an isostatically emergent coast, Dundalk Bay, Eastern Ireland
This paper describes an intertidal boulder pavement and associated facies exposed by marine erosion at Cooley Point on the north shore of Dundalk Bay. The boulder pavement is part of a largely submergent facies sequence which is overlain by a late
The AA. employed rhyolite domes formed during the past million years in eastern California to study the evolution of boulder-dominated slopes. The slopes studied are steep and are made of coarse, boulder-sized blocks. These slopes include well
This paper reports on rock temperature fluctuation in the north and south surfaces of a moraine boulder in Hunza Karakoram obtained over 2 years, and concludes that the rock surface weathering processes depend primarily on the differences