scholarly journals SROVNÁVACÍ STUDIE POVRCHU KŘEMENNÝCH ZRN NA LOKALITÁCH JIŽNÍ A JIHOVÝCHODNÍ MORAVY

2016 ◽  
Vol 23 (1-2) ◽  
Author(s):  
Jana Šušolová ◽  
Veronika Králová ◽  
Roman Hadacz ◽  
Peter Dundek ◽  
Daniel Volařík
Keyword(s):  
Sand Dunes ◽  
Sedimentary Environment ◽  
Small Collection ◽  
Stereo Microscope ◽  
Sandy Sediments ◽  
South Moravia ◽  
The Village ◽  
Archeological Site ◽  
Quartz Grains ◽  
Archaeological Monument

Between 2013–2014, archeological researches at the Mikulčice site were performed. During these researches, necessity of a quartz grains surface study in the Moravian Sahara arose. There is a significant archaeological monument situated near the village of Mikulčice – a Slavic settlement, whose youngest bedrock is formed by fluvial sediments of extinct riverarms of the river Morava, and sand dunes composed of wind-blown sands of the Moravian Sahara. On these sand dunes, the most important churches and palaces of the settlement are found. The sandy sediments can reach up to 30 m thickness in the area of the Moravian Sahara.Samples of sandy sediments were taken from several locations of this site, and also from several other sites of south Moravia, which are sedimentary genetically different from the studied area. One sample of aeolian sand from the desert Rub-al Khali of Arabian Peninsula was provided for comparison.After gathering this small collection of sand grain samples, they were individually modified to the required study form and analyzed according to the demands of the method of exoscopy. At first, one hundred quartzgrains were separated from each sample of the collection using a stereo microscope. After that a detailed study and imaging with the scanning electronmicroscope (SEM) followed.The collection of sands from Mikulčice of the same genetical origin was compared to other samples of genetically known origin (fluvial, eolian...). The final comparison of all samples was performed by the method of multivariate analysis with NMDS. The results show that development of sediments at the archeological site Mikulčice most probably took place in very similar sedimentary environment. In this environment, the eolian transport and the fluvial transport with lower kinetic energy played important role. 

scholarly journals Intestinal parasite analysis in organic sediments collected from a 16th-century Belgian archeological site

2005 ◽  
Vol 21 (1) ◽  
pp. 329-332 ◽  
Author(s):  
Alexandre Fernandes ◽  
Luiz Fernando Ferreira ◽  
Marcelo Luiz Carvalho Gonçalves ◽  
Françoise Bouchet ◽  
Carlos Henrique Klein ◽  
...  
Keyword(s):  
Intestinal Parasite ◽  
Parasite Burden ◽  
Northern Coast ◽  
Free Living ◽  
High Infection ◽  
Free Living Nematode ◽  
Organic Sediments ◽  
The Village ◽  
Archeological Site ◽  
Organic Remains

Parasite eggs found in organic remains collected from medieval structures in Raversijde (medieval name: Walraversijde), a village on the northern coast of Belgium, are discussed. The eggs were identified as Ascaris lumbricoides and Trichuris trichiura, both human parasites. Species identification allowed elucidating the origin of the organic sediments and the structures, in this case latrines used by humans. Capillaria sp. and free-living nematode larvae were also found in the latrine. Although neither parasite burden nor prevalence rates could be measured, the abundance of human intestinal parasite eggs indicated a high infection rate in the village residents, reflecting very poor sanitation.

scholarly journals Wind transport of foraminiferal tests into subaerial dunes: an example from western Ireland

2009 ◽  
Vol 28 (2) ◽  
pp. 185-187 ◽  
Author(s):  
John W. Murray
Keyword(s):  
Persian Gulf ◽  
Sand Dunes ◽  
Low Density ◽  
Coastal Geology ◽  
The West ◽  
Hard Rocks ◽  
Sedimentary Deposit ◽  
Different Shapes ◽  
Western Ireland ◽  
Quartz Grains

Abstract. INTRODUCTIONThe empty tests of dead foraminifera behave as sedimentary particles and are subject to transport, although their different shapes and effectively low density means that their hydraulic equivalence is greater than that of spherical quartz grains (see Haake, 1962). Their estimated traction velocities range from c. 4 cm s−1 to c. 13 cm s−1 (Snyder et al., 1999). The presence of calcareous foraminiferal tests in a fossil sedimentary deposit would normally be taken as an indication of deposition in a marine environment. However, it has long been known that wind can transport tests from a carbonate beach into adjacent carbonate dunes as in Dogs Bay, Connemara, Eire (Murray, 1973) and Abu Dhabi, Persian Gulf (Murray, 1970). The purpose of this Notebook is to provide some details of the Dogs Bay occurrence and to comment on how such deposits might be recognized in the rock record.In western Ireland the coastal geology consists of hard rocks, yet the beaches are commonly composed primarily of calcareous bioclastic sands (Guilcher & King, 1961; Keary, 1967). Dogs Bay (Lat. 53° 24′ N Long. 9° 58′ W) lies on the west-facing side of a tombola which is approximately 200 m wide and 400 m long. The tombola is made up of sand dunes that are mainly vegetated except along the margins adjacent to the beaches. Dogs Bay is exposed to Atlantic storms and the surface layer of the beach is reworked on each tidal cycle. Both the beach and the dunes are composed of . . .

Sand dunes as a major proximal dust source for late Pleistocene loess in the Negev Desert, Israel

2008 ◽  
Vol 70 (2) ◽  
pp. 275-282 ◽  
Author(s):  
Onn Crouvi ◽  
Rivka Amit ◽  
Yehouda Enzel ◽  
Naomi Porat ◽  
Amir Sandler
Keyword(s):  
Grain Size ◽  
Late Pleistocene ◽  
Sand Dunes ◽  
Relative Magnitude ◽  
Negev Desert ◽  
Coarse Silt ◽  
Dust Source ◽  
Desert Sand ◽  
Fine Grain ◽  
Quartz Grains

AbstractGrain size analyses of three hilltop, primary eolian loess sequences in the Negev desert, southern Israel, show a bimodal grain-size distribution at 50–60 μm and 3–8 μm. Using analyses of mineralogy and OSL ages we demonstrate that the coarse mode is composed mostly of quartz grains and its relative magnitude increases regionally with time, suggesting an enhancement of a time-transgressive proximal dust source compared to a distal, Saharan fine-grain dust. The only proximal dust source for large amount of coarse silt quartz grains is the sands that advanced into Sinai and the Negev concurrently with the loess accretion during the late Pleistocene as a result of the exposure of the Mediterranean shelf. We therefore propose that the coarse silt quartz grains were formed through eolian abrasion within the margins of an advancing sand sea. This relationship between desert sand seas as a source for proximal coarse dust and desert margin loess deposits can be applicable to other worldwide deserts such as Northern Africa, China and Australia.

Microplastics in Beach Sediments of the Sea of Azov: Morphological and Morphometric Features

2021 ◽  
Author(s):  
A. E. Glushko ◽  
L. A. Bespalova ◽  
◽  
Keyword(s):  
Morphological Features ◽  
Sea Of Azov ◽  
The Sea Of Azov ◽  
Modified Method ◽  
Kerch Strait ◽  
Morphometric Features ◽  
Beach Sediments ◽  
Stereo Microscope ◽  
Size Of Particles ◽  
The Village

This paper aims at assessment of microplastics concentrations on the beaches of the Sea of Azov and research of morphological features, size of particles, level and ways of degradation (or destruction) of microplastics. During the study, 126 samples of beach deposits were taken at 14 points of the beaches of the Sea of Azov and Kerch Strait. The samples were processed using the modified method NOAA. The analysis showed pollutant’s presence in 100 % of the samples. The concentration of microplastics particles in sand samples from different areas of the beach varies from 12 to 112 pieces per 1 m2 . The highest concentration was found on the beaches in Taganrog and the village of Ilyich. Morphological features of the particles were studied using a stereo microscope (Micromed MC-1 2C Digital). Translucent fibres and membranes prevailed in all the samples. Study of size frequency showed that the most frequently observed are particles of 0.2 mm, the median of size range being 0.5 mm. Types of microplastics degradation were determined using a scanning electron microscope (VEGA II LMU). Dissection, fracturing, and splitting were recorded

scholarly journals III.—Chromite in Beer Stone

1919 ◽  
Vol 6 (11) ◽  
pp. 506-507 ◽  
Author(s):  
G. M. Davies
Keyword(s):  
Geological Survey ◽  
Insoluble Residue ◽  
The South ◽  
The Village ◽  
Shell Fragments ◽  
Quartz Grains

The Beer Stone is a gritty limestone, made up largely of shell fragments with some foraminifera, quartz grains, and 6oft chalky material, occurring in the Rhynchonella Cuvieri zone of the Middle Chalk near Beer Head in the south-east of Devon. It has long been worked for building purposes in underground galleries about one mile west of the village of Beer, and has been described by W. Hill and W. F. Hume in the Geological Survey memoir on the Lower and Middle Chalk. Dr. Hume records the following minerals as present in the insoluble residue of the stone: quartz, muscovite, glauconite, chalcedony, pyrites, tourmaline, rutile, andalusite, and possibly anatase. A. J. Jukes-Browne says the residue “contains a variety of minerals which have clearly been derived from land consisting of granite and Palaeozoic rocks such as occur in South Devon and Cornwall”.

VIII.—Notes on the Pre-Glacial Rock-Platform on the Wexford Coast

1909 ◽  
Vol 6 (11) ◽  
pp. 507-508
Author(s):  
F. R. Cowper Reed
Keyword(s):  
Solid Rock ◽  
East Coast ◽  
Sand Dunes ◽  
Marine Terrace ◽  
The South ◽  
The North ◽  
The Subject ◽  
The Village ◽  
Nearly Continuous ◽  
North And South

The occurrence of a pre-Glacial marine terrace and raised beach along the coast of the south of Ireland was described by Messrs. Wright & Muff in 1904, and its development in the eastern part of co. Waterford was the subject of two short papers by the author in 1907 in this Magazine. Messrs. Wright & Muff (op. cit.) observed the same raised beach only in the south-eastern portion of co. Wexford, so that its recognition this summer by the author further north along the east coast of Ireland deserves recording, for it has been traced for several miles to the north and south of Courtown Harbour, and its height, characters, and relations to the overlying deposits show that it is a continuation of the same feature. The first locality to be mentioned is about 3 miles to the south of the village of Courtown, where relics of it are preserved between Roney Point and Salt Rock; it is still more distinct as a rock-terrace a little further north at Pollshone Head and Breanoge Head, but in the bays between these points the conditions are not favourable for its exposure, as there are no rocky cliffs, only extensive sand-dunes stretching along the shore. From Courtown Harbour northwards for about 2 miles to Duffcarrig Rocks sand-dunes are similarly developed, forming a nearly continuous line of ridges rising to heights of over 50 feet. Thick drift deposits occur behind them, but no pre-Glacial cliff or platform is exposed. At Duffcarrig Rocks solid rock again appears forming the headland, and we can recognize remnants of the rock-cut shelf in a much eroded and fissured condition.

Geochronology and sedimentary environment at the Udu-dong archeological site, Chuncheon, South Korea

The Holocene ◽  
2018 ◽  
Vol 28 (9) ◽  
pp. 1512-1522
Author(s):  
Seungwon Shin ◽  
Yong-Hee Park ◽  
Jeong-Heon Choi ◽  
Hyoun Soo Lim ◽  
Sook-Chung Shin ◽  
...  
Keyword(s):  
South Korea ◽  
Large Scale ◽  
Sedimentary Environment ◽  
Sedimentary Facies ◽  
Human Settlement ◽  
Depositional Processes ◽  
Settlement Site ◽  
Archeomagnetic Dating ◽  
Geochronological Dating ◽  
Archeological Site

The Udu-dong archeological site in Chuncheon, South Korea, dates back to the Proto–Three Kingdoms Period (approximately 100 BC to AD 350). Many artifacts, including some earthenware, have been excavated in these ancient dwelling sites. We applied three geochronological dating methods (radiocarbon, optically stimulated luminescence (OSL), and archeomagnetic dating) to the archeological remains of this large-scale human settlement and reconstructed the history of depositional processes prior to human settlement. The timing of the ancient community’s settlement was investigated by radiocarbon dating of the charcoal fragments collected from old furnaces. Archeomagnetic dating allowed us to constrain the time period of the settlement’s abandonment by dating the last use of fire. The timing and development of fluvial deposits underlying the settlement site were reconstructed by OSL dating combined with sedimentary facies analysis. Our results show that, following the deposition of coarse sediments starting 10,000 years ago, the region formed a stable floodplain environment starting around 3000 years ago; people began to form clustered settlements approximately 50 years later. For the subsequent 150 years or so, the area was heavily used as a settlement site, with people evenly distributed across it, before eventual abandonment of the site around AD 200–250. Because the sedimentary deposits do not show any significant facies change during this period, we conclude that any catastrophic events were not the main reason for settlement abandonment. This study suggests that combining scientific and archeological analyses have significant benefits for studies of such archeological sites. Therefore, continuous collection of such data can provide important information for the excavation and protection of prehistoric or historic sites.

scholarly journals COLLECTION OF BAPTISMAL CROSSES FROM THE ARCHEOLOGICAL SITE OF KULAKOVO III IN THE LOWER TOM’ VALLEY

2018 ◽  
pp. 50-59 ◽  
Author(s):  
A. S. Sizyov ◽  
L. N. Ermolenko ◽  
A. I. Solovyev
Keyword(s):  
Russian Population ◽  
Eastern Siberia ◽  
North Eastern ◽  
The Cross ◽  
A Site ◽  
The Village ◽  
Archeological Site ◽  
Eastern Russia ◽  
Written Sources

The article presents the results of the study on staurographic material of the XVII–XVIII centuries from the settlement of Kulakovo III, a site that can presumably be identified with the village of  Korchuganovo marked in the “Drafting Book (Atlas) of Siberia” by S.  Remezov. The study introduces a collection of 26 metal baptismal  crosses into scientific use; the authors offer a detailed description,  typological characteristics and chronological attributions of the  Christian cult objects under analysis, as well as identify their  analogues in published studies. Most of the crosses discussed belong to type 4 according to the classification developed by V. I. Molodin,  which is based on the materials of Eastern Siberia (Ilimsk stockaded  town). These are specimens with detailed iconography and elements  complementing the outline of the object – rays radiating from the  cross bars, twin volutes surrounding the cross bars like a "wreath" or "tongues of flame" along the edges of the lower blade, etc.  Morphological and iconographic analysis of the crosses indicates their individuality. The range of analogies to the crosses from Kulakovo III  includes materials from northern and north-eastern Russia,  which confirms the data from written sources about the initial  territories of the migration of the Russian population in the Tom’ region.

scholarly journals Geochronological and Sedimentological Interpretation of Interglacial Aquatic Sediments based on TL Dating

2010 ◽  
Vol 35 (-1) ◽  
pp. 75-83 ◽  
Author(s):  
Stanislaw Fedorowicz ◽  
Algirdas Gaigalas
Keyword(s):  
Sedimentary Environment ◽  
Aquatic Sediments ◽  
Transportation Mode ◽  
Tl Dating ◽  
Fine Grained ◽  
Thermoluminescence Dating ◽  
Lithological Composition ◽  
Sample Age ◽  
First Time ◽  
Quartz Grains

Geochronological and Sedimentological Interpretation of Interglacial Aquatic Sediments based on TL DatingFor the first time sedimentological interpretation of absolute ages obtained by thermoluminescence method on aquatic interglacial sediments was made. The analyzed size fractions of quartz grains were 160-250, 125-160, 100-125, 80-100 and 63-80 μm. The youngest and most reliable ages from 22 analyzed samples were obtained from the following quartz grain size granulometric fractions: 160-250 μm - 3 cases, 125-160 μm - 7, 100-125 μm - 6, 80-100 μm - 3 and 63-80 μm - 2 cases. Therefore, it may be concluded that the most suitable fractions for thermoluminescence dating are 125-160 μm and 100-125 μm. While evaluating the results of thermoluminescence dating it is necessary to take into account the procedure of sampling from layers of interest, their lithological composition, first of all granulometric, sedimentary environment, including sources of material, the material getting to the load flows, transportation mode and basin differentiation. From all the granulometric fractions of a sample, age of fine-grained fraction (63-80 μm) may be explained by the input of aeolian dust to a basin and sedimentation along with clasts brought to a lake by water flows. Aeolian sand storms performed precise multigenetic sedimentation that was active during that time. Bimodality of granulometric composition is defined by input of material from various sources of different composition. Older ages were obtained in the case of positive granulometric asymmetry. After sedimentological interpretation of thermoluminescence (TL) dating we can state that formation of aquatic fine-grained sands occurred 83.6±10 - 116.1±13 and 130.2±15 - 276.4±32 thousand years (ky) ago. Those geochronological zones coincide with interg lacial periods of Merkine (75.5-114 ky) and Snaigupele (180-280 ky) in Lithuania.

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