No description available.

No description available.

The geomorphological behaviour of steep jointed rock slopes has been studied using distinct element method computer models. In order to model steep slopes effectively, methodologies need to be combined from the studies of environmental modellers, geomorphologists and engineers. The distinct element method is ideal for the study of the development of jointed rock masses as the discontinuum approach can model the progressive failure of rock blocks along discontinuities. Initial, theoretical modelling identified the limiting boundary conditions between the multiple block failure mechanisms of toppling, sliding and toppling-and-sliding, based upon the discontinuity geometry for a theoretically modelled limestone rock mass. It is demonstrated that joint dip, friction angle and spacing exert the greatest control upon rock mass failure mechanisms. Two field locations, the Colorado Plateau and the Isle of Purbeck, have been chosen to provide a link between theoretical modelling and classic rock mass landforms which are controlled by variation in discontinuity geometry. In the Portland Limestone of the Isle of Purbeck, it is the joint geometry variation which influences development. Bedding steepens and average block size decreases in the coastal rock cliffs from east to west. Comparison between the model outputs highlighted that there is an increase in the rate of simulated cliff retreat from Winspit in the east to Durdle Door in the west. The Colorado Plateau rock cliffs form large, embayed plan-form escarpments and detached monoliths. It is the variation of joint set spacing in the cap-rock of cuesta-form composite scarps that controls development. Model results suggest there is a continuum of rock mass landforms, with buttes becoming detached at plan-form necks in the escarpment as determined by the joint geometry. The results show excellent similarity with the landforms observed in the field. This thesis introduces a research tool that can provide an understanding of slope behaviour.

Diss.--Anthropology--State university of New York at Binghamton, 1999. / Bibliogr. p. 344-384.

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Inaug.-Diss.--Leipzig. / Vita. Bibliography: p. [5]-6.

Proefschrift--Rijksuniversiteit te Groningen. / Bibliography: p. [136]-140.

No description available.

This study represents the first of its kind to examine an extensive lithic debitage assemblage from a Late Dorset inland occupation. The assemblage derives from an isolated Late Dorset component at the LdFa-1 site, located along the northwest shore of Mingo Lake in the deep interior of southern Baffin Island. A study sample of 7,479 lithic debitage is systematically drawn and analyzed using two methodological approaches: individual attribute analysis and mass analysis. Patterns of variability derived from the analysis are isolated and interpreted within a technological organizational framework to identify Late Dorset lithic reduction and use strategies at the site. Using a multi-scalar approach, these results are then compared to those obtained from two inland Pre-Dorset sites, known as Sandy Point (LlDv-10) and Mosquito Ridge (MaDv-11) to draw some conclusions about how Palaeo-Eskimo populations more broadly organized their lithic technologies and used this terrestrial landscape over time.

This study represents the first of its kind to examine an extensive lithic debitage assemblage from a Late Dorset inland occupation. The assemblage derives from an isolated Late Dorset component at the LdFa-1 site, located along the northwest shore of Mingo Lake in the deep interior of southern Baffin Island. A study sample of 7,479 lithic debitage is systematically drawn and analyzed using two methodological approaches: individual attribute analysis and mass analysis. Patterns of variability derived from the analysis are isolated and interpreted within a technological organizational framework to identify Late Dorset lithic reduction and use strategies at the site. Using a multi-scalar approach, these results are then compared to those obtained from two inland Pre-Dorset sites, known as Sandy Point (LlDv-10) and Mosquito Ridge (MaDv-11) to draw some conclusions about how Palaeo-Eskimo populations more broadly organized their lithic technologies and used this terrestrial landscape over time.