1,721,023 research outputs found
The geoarchaeological survey in the central Tadrat Acacus and surroundings (Libyan Sahara
No full textHolocene climatic changes and cultura dynamics in the libyan Sahara
No full textSystematic surveys and excavations were carried out during the 1990-1996 field seasons in the Tadrart Acacus and surrounding areas, shedding new light on the climatic changes and cultural dynamics which occurred during the Holocene. In this paper, the geological, geomorphological, and archaeological evidence is assembled in order to provide a preliminary synthesis on the prehistory of the area
Wadi teshuinat palaeoenvironment and prehistory in South-Western Fezzan (Libyan Sahara) : survey and excavations in the Tadrart Acacus, Erg Uan Kasa, Messak Settafet and Edeyen of Murzuq, 1990-1995
No full textEnvironment and settlements in the mid - Holocene palaeoasis of the wadi Tanezzuft (Libyan Sahara )
No full textUnesco Word Heritage Site vandalised. Report on damages to Acacus rock art paintings (SW Libya)
No full textThe recent vandalism of some paintings and engravings in the Acacus Mts. (SW Libya, central Sahara), a UNESCO World Heritage site since 1985, has been the subject of field and laboratory assessment by the Libyan Department of Archaeology (DoA) and the Italian-Libyan Archaeological Mission (Sapienza University of Rome). The damage is extremely severe, and it is unlikely that the paintings can be successfully restored, whereas it is hoped that some engravings can be cleaned. In this paper, we suggest that this umpteenth attack on Libya’s cultural heritage should be seen in a broader perspective: the Libyan authorities, and researchers and scholars working in the area should renew their view of these delicate contexts. Management tools and safeguard approaches should probably be reconsidered, in order to guarantee a better protection of the area
Geo-Archaeological survey in the Kufra Eni Contract Area (Eastern Sahara, SE Libya)
No full textThe results of a geo-archaeological survey
in an area south of Kufra (SE
Libya) are discussed. The campaign,
organised by the Department of Archaeology
of Tripoli (Libya) with the University
La Sapienza (Rome), was funded
by ENI North Africa BV. The survey
brought to light an unexpectedly rich
cultural heritage, testifying human occupation
from the Old Stone age to Late
Holocene. Palaeo-environmental evidence,
on the contrary, is rare because
of wind erosion. Archaeological evidence
is from large Old Stone age sites
for the exploitation of raw material
(close to quartzarenite outcrops), and
sites belonging to the Pastoral Neolithic
horizon. Sites with lithics, ceramics,
fireplaces and grinding stones are few,
while isolated tethering stones are scattered
all over the investigated area.
They testify the marginality of this region
during the Middle Holocene. Finally,
some stone structures were identified,
including tumuli, alignments and
road markers. The project stressed the
archaeological importance of the area
and allowed to collect a sufficient
amount of data to define a spatial and
chronological relationship with better
known regions of the Sahara
Step pseudomorphic asymmetric wells: an optical study in the framework of III-V strain induced sub-2D quantum systems
No full textAn optical study of the basic epitaxial structure for the fabrication of strain-induced sub-two-dimensional quantum systems was performed by comparing photoreflectance measurements with calculations of the energy positions and the relative intensities of the interband transitions originating in the different regions of
the sample. It is shown that by taking advantage of the explicit calculation of the overlap integrals associated with the asymmetric well transitions, the complicated optical response of the whole heterostructure can easily be interpreted. This, in
turn, enables the development of the optical investigation of the inner GaAs well (the active region of the device) by means of photoreflectance even at room temperature, as an alternative to the most commonly used low-temperature luminescence techniques
Palaeoenvironmental and cultural meaning of the tethering stones from the Kufra area (Libyan Sahara)
No full textFrom taming to pastoralism in a drying environment. Site formation processes in the shelters of the Tadrat Acacus massif (Libya, Central Sahara
No full textSome insights on the Aterian in the Libyan Sahara. Chronologies, Environment and Archaeology
No full textThe Aterian has a huge geographic extension covering all North Africa, although it was not supposed to exist in the mountain ranges of the central Sahara. Its chronological context is not yet definitively determined and it is still difficult to say whether the Aterian tools are technological, typological, functional, or chronological markers. Recent surveys and excavations at Uan Tabu and Uan Afuda, two rock-shelters located in the central Tadrart Acacus, provide the first chronological, environmental and archaeological indications on this Late Pleistocene human occupation in the area. The lack of organic matter led us to perform OSL and TL analyses on sand
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