The Holocene Evolution of Rheban Spit, Tasmania
نویسنده
چکیده
Calcareous sands and podzols of four different ages (0, 3 100, 4200 and 5500 calendar years) form a soil chronosequence at Rheban Spit, a prograded sand barrier, near Orford on the east coast of Tasmania. In terms of profile morphology the soils range from undifferentiated quartz sand with shell at the youngest site, to a well-developed podzol with prominent AI, A, and B horizons at the oldest site. Age trends are derived for a number of soil features, the most significant of which are the leaching from the sediments of detrital marine shell carbonate, the increase in organic matter content in the A and B horizons, the decrease in profile pH, the progressive development of A, and B horizons in terms of acid-extractable iron and aluminium, the increase in thickness of the B horizon and the decrease in the average concentration of cations in the profiles. Most of these age trends are in accord with those derived from soil chronosequences in New South Wales and overseas, but some are markedly different.
منابع مشابه
Pedosedimentary Evolution and Site Formation Processes in Mirak Mound 8, South of Semnan
Mirak is one of the open-air Paleolithic sites in the Iranian Central Plateau and the only Iranian archaeological open-air site which has been excavated extensively. The site is comprised of 8 mounds, located in a dry floodplain some kilometers south of Semnan in the northern fringes of the Iranian Central Desert, aka. Dash-I Kavir. Mirak mound no. 8 was selected for the excavation. The mound i...
متن کاملLate Holocene Caspian Sea Level Changes and its Impacts on Low Lying Coastal Evolution: a Multidisciplinary Case Study from South Southeastern Flank of the Caspian Sea
Caspian Sea is the largest land locked water body in the world and has been characterized by significant relative sea-level changes since the Pliocene. The sea-level oscillations have strongly impacted the coastal areas depending on geomorphological setting. This study aims to investigate the impacts of sea level oscillations on low-lying coasts of the southeastern flank of the Caspian Sea...
متن کاملClimate-Human interaction over the Iranian Plateau during the Upper Pleistocene-Holocene: A review
During the past two decades an array of studies have shed light on potential links between the evolution of Hominids as well as Human dispersal out of Africa and episodes of abrupt climate change. Although archaeological evidences suggest that anatomically modified humans appeared in Africa between 200 and 150 ky ago, the timing of the early humans migration out of Africa remained unclear. Stra...
متن کاملDemography and Cultural Evolution How Adaptive Cultural Processes Can Produce Maladaptive Losses—the Tasmanian Case
A combination of archeological and ethnohistorical evidence indicates that, over an approximately 8,000-year period, from the beginning of the Holocene until European explorers began arriving in the eighteenth century, the societies of Tasmania lost a series of valuable skills and technologies. These likely included bone tools, cold-weather clothing, hafted tools, nets, fishing spears, barbed s...
متن کامل