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191.
Cristian Kaufmann María A. Gutiérrez María C. Álvarez Mariela E. González Agustina Massigoge 《Journal of archaeological science》2011,38(2):334-344
Hydrodynamic sorting is a taphonomic process able to transport and scatter bones deposited in archaeological and paleontological sites. This study presents the results of experimentation performed in an artificial flume with guanaco (Lama guanicoe) bones of different ontogenetic development, dry and saturated in water, in hydric flows velocities of 15 and 30 cm/s. The obtained results show that bone global density, the age of the individual, the dry or wet bone state, and the hydric flow velocity influence significantly bone dispersion. In this way, bones from immature individuals with unfused secondary growth centers and relatively low bulk density have better possibility of being transported than fused bones from adult individuals. Taking into account the results obtained in this experimentation and the feasibility of discriminating age categories in fossil assemblages, two bone groups with differential potential transport are presented in this paper. These transport groups constitute a methodological tool to evaluate the role hydric current may had played in the formation of a fossil assemblage. 相似文献
192.
Alan T. Murray Jing Xu Jiwon Baik Susan Burtner Seonga Cho Evgeny Noi B. Amelia Pludow Enbo Zhou 《Geographical analysis》2020,52(4):480-493
The academic contributions of Waldo Tobler are noteworthy and significant, spanning essentially all disciplines that involve the study of geographic phenomena. While much attention has been given to his observations of the first law of geography, there is much more substance to his larger body of research. It is especially fitting that this commemorative special issue is appearing in Geographical Analysis as Tobler published extensively in the journal, beginning in the first volume in 1969 up to volume 42 in 2010, making important contributions to quantitative theoretical geography. His research helped to build and sustain the journal, laying the foundation for what is the premier quantitative geography outlet today. This article reviews his publication activity in Geographical Analysis. 相似文献
193.