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Mortoniceratid ammonites of the Eromanga Basin of Queensland, although uncommon, are reviewed and reassessed utilising all known collections. Representatives of this group are restricted to the Allaru Formation and almost all specimens are Goodhallites goodhalli, a well-known species from the English Gault. The Allaru Formation overlies the Toolebuc Formation, widely considered to be an essentially isochronous unit because of its unusual sedimentary and geochemical character. Using G. goodhalli, the middle and upper Allaru Formation can be directly correlated with the early late Albian orbignyi and auritus Subzones of the Mortoniceras inflatum Zone as recognized in the reference ammonite zonation embedded in the standard Cretaceous time scale. Overlapping ranges of G. goodhalli and Labeceras and Myloceras allow these common Austral heteromorph genera to be also confidently assigned a late Albian age in Australia, matching their biostratigraphic occurrence in South Africa. 相似文献
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Erin L. Jordan 《Journal of Medieval History》2018,44(2):187-201
This article investigates the extent to which women’s monastic communities intervened in the natural landscape of the southern Low Countries in the Middle Ages, irrevocably transforming the environment in their efforts to support their communities. Focusing on the county of Flanders in particular, it contributes to an expanding historiography that traces the impact of human intervention on the natural world in the pre-modern period. Simultaneously, it offers a glimpse into a world where religious women worked alongside their male counterparts, challenging past notions about how gender shaped monasticism in the Middle Ages. While scholars have often noted the role of monastic communities in reclamation activities, this article makes a unique contribution by inserting Cistercian nuns into the narrative, ultimately producing a more inclusive and more accurate understanding of monastic experience in the Middle Ages. 相似文献
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Mikael Fauvelle Erin M. Smith Sean H. Brown Matthew R. Des Lauriers 《Journal of archaeological science》2012
The design of a projectile delivery system often plays a critical role in the durability and breakage patterns associated with spent projectile points. This paper presents the results of an experimental project designed to examine projectile point durability and breakage patterns between three different hafting methods. Specifically, we compare two asphaltum hafting techniques drawn from archaeological and ethnohistoric accounts from the Central Valley of California with a more stereotypical cross-hatched sinew hafting system. Our results suggest a small yet statistically significant increase in durability among asphaltum hafted points, opening the door to future research on these ethnohistorically documented hafting techniques. 相似文献
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In cognitive archeology, theories of cognition are used to guide interpretation of archeological evidence. This process provides useful feedback on the theories themselves. The attempt to accommodate archeological data helps shape ideas about how human cognition has evolved and thus—by extension—how the modern form functions. But the implications that archeology has for cognitive science particularly relate to traditional proposals from the field involving modular decomposition, symbolic thought and the mediating role of language. There is a need to make a connection with more recent approaches, which more strongly emphasize information, probabilistic reasoning and exploitation of embodiment. Proposals from cognitive archeology, in which evolution of cognition is seen to involve a transition to symbolic thought need to be realigned with theories from cognitive science that no longer give symbolic reasoning a central role. The present paper develops an informational approach, in which the transition is understood to involve cumulative development of information-rich generalizations. 相似文献
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