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Climate north of the Atlas Mountain belt in NW Africa is dominated by extratropical disturbances. However, climatic controls to the south, where climate transitions from extratropical to tropical regimes, are poorly understood due to a paucity of both instrumental and palaeoclimate data. In this thesis past climate change between the High Atlas Mountains and Sahara Desert is reconstructed using the stable isotopic composition and radiometric dating of speleothems. A high-resolution record from the mid-Holocene and a discontinuous record covering the past 400,000 years are developed. Supplemented by U-Th dating of a further four samples, these records indicate increased humidity in this area concomitant with the wider African Humid Period, and indicate a link between the West African Monsoon and humidity north of 30°N. Reconstructed glacial-interglacial scale increases in humidity overlap with "green Sahara" conditions and evidence a recurrent humid corridor connecting NW Africa and the central Sahara that is highly relevant to discussions of prehistoric human migrations. Evidence for a strong influence of high-latitude and solar forcing on decadal to millennial time- scales in this area is also presented. Further to this work, the potential of cadmium-to-calcite ratios as a novel proxy for palaeo-hydrology is confirmed using an annually-resolved trace element, stable isotope and calcite fabric dataset from a North Moroccan stalagmite. The first measurements of cadmium-to-calcite ratios in natural speleothem are here presented, and the palaeoclimatic significance and potential of this proxy for aiding the quantitative reconstruction of changes in calcite precipitation behaviour are demonstrated.

Projectile points manufactured from antler, bone, ivory, and horn were a significant component of the Pleistocene hunter-gatherer’s weapons toolkit. While this situation appears to have been particularly the case for Upper Palaeolithic Europe where thousands of implements from Aurignacian to Azilian contexts have been recovered, elements of osseous technologies are increasingly being identified in Africa, Asia, Australia and North America. Projectile weaponry tipped with osseous raw materials therefore constitute a major dataset for the investigation of technological, subsistence, and social aspects of various and numerous Pleistocene populations. Having once been described as ‘impossible to evaluate’, investigation of maintenance and discard patterns for osseous projectile point assemblages has been severely neglected in the archaeological literature. As previous work has generally been restricted to qualitative descriptions of single artefacts exhibiting clear signs of rejuvenation or recycling, our knowledge of ‘the keeping’ of these toolkits is therefore extraordinarily limited. This thesis addresses this imbalance through beginning to build a robust methodology for investigating the maintenance, recycling, and discard of osseous projectile weaponry. More than 4,000 whole and fragmentary barbed and unbarbed osseous projectile points recovered from 25 Middle to Late Magdalenian sites located throughout France and southern Germany were examined, and through employing a multi-faceted approach incorporating metric analyses, statistics, use wear analysis, and the examination of contemporaneous depictions of weaponry, inter-site and inter-regional differences in maintenance and discard patterns were successfully identified. These results are discussed from a regional perspective in order to articulate these new data into interpretations of wider Magdalenian economic and social organisation.