نتایج جستجو برای: midden soil
تعداد نتایج: 180969 فیلتر نتایج به سال:
The purpose of design for sustainability, in a broad sense, is to reduce our negative impact on the environment, society, and the economy. To date, various approaches have been proposed to serve this purpose (1). These approaches commonly focus on the physical and technological qualities of sustainable products or services; for instance, reducing the amount of material used during manufacture, ...
Meiolaniid or horned turtles are members of the extinct Pleistocene megafauna of Australia and the southwest Pacific. The timing and causes of their extinction have remained elusive. Here we report the remains of meiolaniid turtles from cemetery and midden layers dating 3,100/3,000 calibrated years before present to approximately 2,900/2,800 calibrated years before present in the Teouma Lapita ...
Anthropogenic shell accumulations (shell middens), often of great size, occur in their tens thousands around the world’s coastlines. They mostly date from Mid-Holocene onwards and are frequently taken as symptomatic a Postglacial ‘revolution’ involving world-wide population growth intensification exploitation marine resources. However, comparative rarity earlier deposits may have much to do wit...
The demographic history of Greenland is characterized by recurrent migrations and extinctions since the first humans arrived 4,500 years ago. Our current understanding of these extinct cultures relies primarily on preserved fossils found in their archaeological deposits, which hold valuable information on past subsistence practices. However, some exploited taxa, though economically important, c...
The Sydney octopus (Octopus tetricus) occurs in unusual numbers on a shell bed of its prey remains that have accumulated as an extended midden where additional octopuses excavate dens. Here, O tetricus are ecosystem engineers, organisms that modulate availability of resources to other species and to their own species by causing physical state changes in materials. A community of invertebrate gr...
gol-e-gohar iron ore mine of sirjan in southern part of iran is a large open pit that operates below the groundwater table and during mining operation, dewatering is required to prevent operation processes from flooding. current operation is going on by digging wells in or out of the pit and pumping to prevent flooding. as a result of the former dewatering operation a vast deep cone of depressi...
studies have tended to use multi-element analysis techniques to establish elemental patterns for selected functional areas or across sampling grids covering entire archaeological sites. Spatial patterns have been identified for particular elements, but the outstanding problem is the interpretation of the results. the essential approach has been to establish patterns and then to propose reasons....
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