scholarly journals Preliminary Report on Unique Laminated Holocene Sediments from the Qarun Lake in Egypt

2016 ◽  
Vol 33 (1) ◽  
pp. 35-46 ◽  
Author(s):  
Leszek Marks ◽  
Alaa Salem ◽  
Fabian Welc ◽  
Jerzy Nitychoruk ◽  
Zhongyuan Chen ◽  
...  
Keyword(s):  
Environmental History ◽  
Sediment Cores ◽  
Coarse Grained ◽  
Archaeological Sites ◽  
Varved Sediments ◽  
The Core ◽  
Basal Section ◽  
History Of ◽  
Southwestern Margin ◽  
The One

Abstract The Lake Qarun (Faiyum Oasis, northern Egypt) is a relic of the much larger Holocene lake. Past lake levels and extensions were reconstructed, based on setting of archaeological sites scattered along northern paleoshores of the ancient lake. However, geoarcheological works did not yield enough data to establish continuous environmental history of the lake. A deep drilling FA-1 on the southeastern shore of the lake, performed in 2014, supplied with a core, 26 m long that is the one of the longest lake sediment cores in northeastern Africa. The basal section of the core consisted of thin-laminated diatom marly deposits, underlain at the Late Pleistocene/Holocene boundary by coarse-grained sands. The sediment lamine were quite well developed, especially in the lower part of the core. Preliminary results indicated annually deposited sediment sequence with seasonality signals provided by microlamine of diatoms, calcite, organic matter and clastic material. Early Holocene varved sediments from the Faiyum Oasis supplied with exceptional paleoenvironmental data for northeastern Africa, which enriched a record from previous logs drilled at the southwestern margin of the Qarun Lake.

scholarly journals Glacial-Marine Sedimentation, Canadian Polar Margin, North of Axel Heiberg Island

2007 ◽  
Vol 45 (2) ◽  
pp. 213-227 ◽  
Author(s):  
Frances J. Hein ◽  
Peta J. Mudie
Keyword(s):  
Sediment Cores ◽  
Open Water ◽  
Silty Clay ◽  
Sedimentation Rates ◽  
The Core ◽  
Marine Sedimentation ◽  
Northwestern Shelf ◽  
History Of ◽  
Axel Heiberg Island ◽  
High Sediment

ABSTRACT Sediment cores, taken at depths of 140 to 300 m across the northwestern shelf of Axel Heiberg Island (82° N), record the deposition of sediments under perennial sea ice. Five sedimentary fades are recognized: (A) soft pebbly-sandy-mud with dropstone structures; (B) bioturbated silty muds; (C) wispy-laminated silty clay/clay; (D) laminated sands/silts and mud; (E) firm pebbly-sandy-mud with chaotic pebble fabrics. Other sediments include terrestrial bedrock of Paleogene Eureka Sound Group, and a younger Tertiary deposit, possibly the Beaufort Formation. Ages range from 1530 ± 60 BP (Fades A) to 9950 ± 80 BP (Fades D). Sedimentation rates vary as follows: - 0.8 cm ka-1, Fades B; 4 cm ka"\ Fades A; 90 cm ka-1, Fades C; 134 cm ka~', Fades D. The sedimentation history, as interpreted from the sedimentology, palynology and foraminiferal results, suggests intervals of more continuous ice cover, with a reduced influx of coarse ice-rafted detritus, alternating with more open water conditions, and high sediment input from meltwater and/or floating icebergs. Only marine sediments overlie Neogene bedrock in the cores. The absence of diamictons at the core sites suggests that grounded ice perhaps never occupied this part of the Axel Heiberg Island shelf. The interpreted history of sedimentation generally corresponds to the land-based record from Ellesmere Island, but differs significantly from marine-based studies in more southern latitudes.

Legacies of Slavery in North-West Uganda: The Story of the ‘one-Elevens’

Africa ◽  
2006 ◽  
Vol 76 (2) ◽  
pp. 180-199 ◽  
Author(s):  
Mark Leopold
Keyword(s):  
Northern Uganda ◽  
East African ◽  
Southern Sudan ◽  
North West ◽  
The Core ◽  
The North ◽  
Rebel Groups ◽  
The Face ◽  
History Of ◽  
The One

AbstractThis article outlines the history of a people known as ‘Nubi’ or ‘Nubians’, northern Ugandan Muslims who were closely associated with Idi Amin's rule, and a group to which he himself belonged. They were supposed to be the descendants of former slave soldiers from southern Sudan, who in the late 1880s at the time of the Mahdi's Islamic uprising came into what is now Uganda under the command of a German officer named Emin Pasha. In reality, the identity became an elective one, open to Muslim males from the northern Uganda/southern Sudan borderlands, as well as descendants of the original soldiers. These soldiers, taken on by Frederick Lugard of the Imperial British East Africa Company, formed the core of the forces used to carve out much of Britain's East African Empire. From the days of Emin Pasha to those of Idi Amin, some Nubi men were identified by a marking of three vertical lines on the face – the ‘One-Elevens’. Although since Amin's overthrow many Muslims from the north of the country prefer to identify themselves as members of local Ugandan ethnic groups rather than as ‘Nubis’, aspects of Nubi identity live on among Ugandan rebel groups, as well as in cyberspace.

Preliminary Survey and Core Sampling on the Aegean Coast of Turkey

1992 ◽  
Vol 42 ◽  
pp. 75-78
Author(s):  
K. Lambrianides
Keyword(s):  
Environmental History ◽  
Human Occupation ◽  
Human Environment ◽  
The Core ◽  
Cultural Systems ◽  
History Of ◽  
University College London ◽  
The Government ◽  
Geomorphological Evolution ◽  
Coastal Settlement

This survey was planned with the help of the Human Environment Department of the Institute of Archaeology, University College London. Fieldwork was carried out with the help of: Bayan Asuman Güngör, the government representative (from Türk İslam Müzesi, Yeşil-Bursa). We also welcomed two visitors from Ege Üniversitesi, Edebiyat Fakültesi: Mr. Kirami Ölgen (geomorphologist and research assistant of Prof, İlhan Kayan, Coğrafya Bölümü) and Dr. Halime Hüryılmaz, (archaeologist, Klasik Arkeoloji Anabilim Dalı), who came to Altınova and provided invaluable expertise. We were also greatly assisted throughout by the advice and involvement of Prof, İlhan Kayan himself before, during and after the coring. Initial analysis of the core samples was carried out at their laboratory at Ege by Prof. Kayan and Mr. Ölgen. The latter also sampled the cores and prepared the chart of the bore-hole findings. Finance was again generously provided by the BIAA and the CRF of London University. Fieldwork took place between 30th October and 8th November 1991.The aim of the survey was to study the geomorphological evolution of the Madra Çay delta and to learn more about the palaeo-environmental history of a mound located on the delta, as part of a study of prehistoric coastal settlement on the Aegean coast of Turkey. Adaptation to the environment is regarded as one of the four functional criteria of cultural systems and we wanted to find out which of the various different phases in the changing environment of the delta had attracted human occupation.

scholarly journals Late-Quaternary Vegetational and Climatic History of the Yellowstone/Grand Teton Region

1988 ◽  
Vol 12 ◽  
pp. 189-192
Author(s):  
Cathy Barnosky
Keyword(s):  
Environmental History ◽  
Late Quaternary ◽  
Sediment Cores ◽  
Sediment Accumulation ◽  
Fire Frequency ◽  
Ice Age ◽  
Sediment Chemistry ◽  
History Of ◽  
Climatic History

The research underway has focused on two different aspects of the environmental history of the Yellowstone/Grand Teton region. One objective has been to examine the long-term vegetational and climatic history of Jackson Hole, the Pinyon Peak Highlands, and Yellowstone Park since the end of late Pinedale glaciation, about 14,000 years ago. Fossil pollen in sediment cores from lakes in the region is being analyzed to clarify the nature and composition of ice-age refugia, the rate and direction of plant migrations in the initial stages of reforestation, and the long-term stability of postglacial communities. Sedimentary charcoal also is being examined to reconstruct fire frequency during different climatic regions and different vegetation types in the past. This information is necessary to assess the sensitivity of plant communities to environmental change and to understand postglacial landscapes of the northern rocky Mountains. The second objective has been a multidisciplinary investigation of the relationship of climate to sedimentation rates in lakes and ponds in Yellowstone, undertaken with Drs. Wright, D.R. Engstrom and S.C. Fritz of the University of Minnesota. This facet of the research examines the relative importance of climate, fire, hillslope erosion induced by overgrazing, and nutrient enrichment in the last 150 years, as recorded in selected lakes in the northern range of Yellowstone. Populations of elk and bison are known to have fluctuated greatly during this interval, and slight climatic changes are suggested from other lines of research. In this study pollen, diatoms, charcoal, sediment chemistry, and sediment accumulation rates are analyzed in short cores from small lakes.

scholarly journals Etude de l'impact des barrages sur la réduction des transports sédimentaires jusqu'à la mer par approche paléohydrologique dans la basse vallée de la Medjerda

2018 ◽  
Vol 377 ◽  
pp. 67-76 ◽  
Author(s):  
Fatma Kotti ◽  
Laurent Dezileau ◽  
Gil Mahé ◽  
Hamadi Habaieb ◽  
Malik Bentkaya ◽  
...  
Keyword(s):  
Sediment Transport ◽  
Global Climate ◽  
Sediment Cores ◽  
Sediment Supply ◽  
Water Storage Capacity ◽  
Sedimentary Deposits ◽  
The Core ◽  
River Bed ◽  
History Of ◽  
Marine Influence

Abstract. The sedimentary contributions of the Medjerda to the coastal zone are poorly measured, and there is no chronicle of observations. In this context, the sediment monitoring appears indispensable for the quantification of sediment transport at the outlet. This study focuses on the largest watershed in Tunisia, the Wadi Medjerda (23 600 km2). The main objective of this work is to assess the reduction of sediment transport following anthropogenic intensification on the basin, especially since the construction of many large dams. In order to collect information on actual deposits over several years, the paleo-hydrological approach was applied through the study of sediment cores sampled in the low valley meanders on alluvial terraces, after the last dam (Sidi Salem, the largest water storage capacity over the basin), but before the estuary to avoid marine influence and near a hydrological station (Jdaida). The sedimentary deposits of the river provide key information on the past sedimentary inputs. A visible succession of sedimentary layers corresponding to the deposits of successive floods on the study site has been determined and the history of the sedimentary contributions of the Medjerda is reconstructed by this approach. The thickest layers of sedimentary deposits are related to exceptional events. They are mainly concentrated on the lower part of the core and are mainly composed of sands. The first 1.2 m of the core from the bottom upward relates to 10 years of river discharges, as can be determined from the 137Cs datation. The next upward 1.05 m of core relates to the following 20 years of discharges, up to 1981, date of the construction of the Sidi Salem dam, and is composed of a mix of sand, silts and clays. The last 75 cm of core near the surface is only composed of clays with thin silt bands, and relates to a period of 32 years. We thus observe that there is no more sand deposits in the river bed since the construction of the Sidi Salem dam. The deficit of sediment supply to the sea is viewed as a major factor to be taken into account for better understanding of the dynamics of coastal areas in the context of global climate change.

scholarly journals The Los Llantenes Formation in the Precordillera of Jagüe (La Rioja Province) and the recognition of a rifting stage in the early evolution of the late Paleozoic basins in western Argentina.

2011 ◽  
Vol 38 (2) ◽  
pp. 245 ◽  
Author(s):  
Ricardo A. Astini ◽  
Federico Martina ◽  
Federico M. Davila
Keyword(s):  
Coarse Grained ◽  
Areal Extent ◽  
The South ◽  
Great Thickness ◽  
Basement Rocks ◽  
Upper Paleozoic ◽  
Basal Section ◽  
History Of ◽  
Low Efficiency ◽  
La Rioja

In the northern part of the Argentine Precordillera, northwestern La Rioja, the Upper Paleozoic is over 4,000 m thick. Very coarse conglomerates from the basal section have not been described nor adequately interpreted. This work analyses this unit in the context of a stratigraphic revision of the upper Paleozoic of the region, and interprets the conglomerate as a rift deposit. The thick (>1,000 m) and coarse purple conglomeratic succession, herein named ‘Los Llantenes Formation’, non-conformably rests on the basement rocks of the region and underlies deposits of the first glacial record associated with the Gondwanan glaciation. While its great thickness and restricted areal extent indicate localized subsidence, the crude stratification, poor sorting and abundance of >1-m boulders indicate an origin related to high-gradient, low-efficiency alluvial fans. Their composition and coarse-grained size indicate local provenance, abrupt relief and incipiently developed drainage systems and a highly compartmentalized and abrupt paleogeography. A complex glacial history generated deep ‘U’-shaped paleovalleys in the Los Llantenes Formation, developing paleovalleys that accommodated basal lodgment tills and glacial diamictites with sedimentologic features comparable to the Cerro Tres Condores Formation (Visean in age) exposed to the south. The age of the conglomerates of Los Llantenes Formation, clearly preglacial, can be stratigraphically bracketed between the Middle Devonian substrate cropping out to the south in the sierra de Las Minitas and the Middle Mississippian, age of the Cerro Tres Condores Formation. Consequently, Los Llantenes Formation may partly correlate with the Agua de Lucho Formation (Tournaisian-Vissean) that in the area of Rio del Penon, immediately to the south, underlies the glacigenic Cerro Tres Condores Formation. Mapping relationships with limited areal extent, together with the great thickness of Los Llantenes Formation and the local provenance, allow interpreting accommodation in extensional or pull-apart depocenters, conclusions that are relevant in order to reconstruct the history of the basin.

scholarly journals On the Simplest Reading of Bartol’s Alamut

Asian Studies ◽  
2016 ◽  
Vol 4 (1) ◽  
pp. 215-227
Author(s):  
Tahereh AHMADIPOUR
Keyword(s):  
Literary Work ◽  
The Novel ◽  
Historical Criticism ◽  
The Core ◽  
Relevant Evidence ◽  
Social Events ◽  
History Of ◽  
The One ◽  
Core Part ◽  
History Book

Bartol’s Alamut as a valuable Slovenian literary work has been exposed to several interpretations for more than 70 years. The simplest or maybe the most credulous reading of this book is the one that considers it as a history book. This reading deems that the novel literally narrates the political and social events of Iran in the 11th century, the time that the Ismailis with Hasan Sabbah as the leader ruled over Alamut Castle. In this article the novel’s most important interpretations have been provided by discussing the deliberate critical essays through content analysis and historical criticism of the happenings. Then by using some important historical documents and relevant evidence, some events and persons of that time have been detected. The main aim of the article is to show that while Bartol incorporated a vast knowledge of the history of the Middle East as the core part of his novel, he also regarded his own nation and the miserable events of his own country. As a matter of fact he sent a harsh message through creating his own Hasan Sabbah, without any concern for the history.

scholarly journals Late-Quaternary Vegetation History of Jackson Hole, Wyoming

1982 ◽  
Vol 6 ◽  
pp. 35-36
Author(s):  
Cathy Barnosky
Keyword(s):  
Environmental History ◽  
Plant Communities ◽  
Rocky Mountains ◽  
Vegetation History ◽  
Late Quaternary ◽  
Sediment Cores ◽  
Northern Rocky Mountains ◽  
Hole Area ◽  
Jackson Hole ◽  
History Of

During the late Quaternary, the Jackson Hole area has reen repeatedly glaciated-the most recent and least extensive ice advance occurred during the Pinedale Glaciation (ca. 25,000-9,000 yr B.P.; Love and Reed, 1971). The objective of this research is to study the vegetation history of Jackson Hole since Pinedale time, as a means of interpreting the development and stability of modern plant communities. The research is based on an examination of pollen and plant-macrofossiil records contained in lake-sediment cores collected near the former ice margin. The environmental history of this region is poorly known and the paleoecological information provided by this study should help fill a gap in our understanding of the vegetation, climate, and glacial history of the Northern Rocky Mountains.

scholarly journals ANTHRACOLOGICAL EVALUATION AT ARCHAEOLOGICAL SITES OF GUARANI OCCUPATION - TAPHONOMIC COMPARISONS TO CONSTRUCT THE ENVIRONMENTAL HISTORY OF THE FORQUETA RIVER BASIN, RS, BRAZIL

2017 ◽  
Vol 24 (2) ◽  
Author(s):  
Mariela Inês Secchi ◽  
Isa Carla Osterkamp ◽  
Marjorie Kauffmann ◽  
Joana Beuren ◽  
Neli Tersinha Galarce Machado ◽  
...  
Keyword(s):  
Environmental History ◽  
River Basin ◽  
Human Activities ◽  
Natural Sciences ◽  
Archaeological Sites ◽  
Anatomical Characteristics ◽  
Anthropogenic Origin ◽  
University Center ◽  
History Of

Anthracological studies aim at the reconstruction of the paleoenvironment through the analysis and interpretation of macroremains of carbonized woods found in soils and archaeological sites that are related to previous human activities. The objective of this study was to compare the anthrocological and taphonomic data of the Archaeological Sites RS-T-101 and RS-T-114, located in the municipality of Marques de Souza, associated with pre-colonial occupancies of Guarani origin (archaeological sites RS-T-114 and RS-T-101, respectively, in 1,410-431 BP years and 1,411 -295 years BP, to build the environmental history of the Forqueta River basin based on taphonomic comparisons between these two sites. The traces analyzed were collected following methodology scaling and blasting, being conducted by the Archeology Section of the team’s Museum of Natural Sciences of the UNIVATES University Center. In this work, the images of carbon obtained under SEM were analyzed from both sites, which were the object of previous anthrachological studies, being used to perform the taphonomic comparisons. From the images, it can be inferred that the recovered charcoals in the sites had their anatomical characteristics well preserved, being possible to observe homogenization of the cellular walls, as well as the thickness of the walls demonstrates fires with temperatures that did not exceed 340ºC. Moreover, with this study it was possible to infer that the fragments found in these sites may have been originated by fires of anthropogenic origin because they are dispersed in the sedimentary matrix as well as in places with the presence of vestiges of fires.

scholarly journals NATO reqiurements as referred to risk in executed contracts

2018 ◽  
Vol 48 (1) ◽  
pp. 419-429
Author(s):  
Joanna Wójcik ◽  
Włodzimierz Kosiński
Keyword(s):  
Risk Management ◽  
Iso 9000 ◽  
Specific Structure ◽  
Iso 9001 ◽  
Standard Series ◽  
The Core ◽  
History Of ◽  
The One ◽  
The Military

Abstract Requirements on risk management are a problem that is described in all of NATO documents written for contract execution purposes. Namely, these documents have become the basis to introduce these requirements into other documents that apply to various aspects of life. This article describes problems concerning a risk-based approach in executing contracts for the military. The core of the documents, developed by the NATO members, has been, since the foundation of these documents, the ISO 9001 standard. Although in the history of the NATO document’s period of validity, they had structure identical to the one of ISO 9000 standard series, in their last iteration they gained their specific structure of contents, oriented for specification of the requirements for contracts execution.

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