scholarly journals Archaeometrical analysis of Neolithic pottery from the Divača region, Slovenia

2004 ◽  
Vol 31 ◽  
pp. 205-220
Author(s):  
Andreja Žibrat Gašparič
Keyword(s):  
Chemical Composition ◽  
Neolithic Period ◽  
Chemical Analyses ◽  
Local Production ◽  
Sediment Samples ◽  
Cave Deposits ◽  
Rock Shelters ◽  
Neolithic Pottery

The results of the mineralogical and chemical analyses of pottery from the Neolithic period from the Divača region are presented. Pottery samples from two rock shelters, i.e. Mala Triglavca and Trhlovca, were included in the analyses, as well as sediment samples from other rock shelters, caves and rivers around this area. The mineralogical and chemical composition of the ceramic is uniform in most of the samples; the differences between the clay pastes of the vessels are in the use of a tempering material, mostly calcite grains. The sediment samples, especially from the cave deposits, point to a local production of the Neolithic pottery on the Karst plateau.

Neolithic Pottery and other Remains from Pangbourne, Berks., and Caversham, Oxon

1929 ◽  
Vol 6 (1) ◽  
pp. 30-39 ◽  
Author(s):  
Stuart Piggott
Keyword(s):  
Present State ◽  
The Other ◽  
Neolithic Period ◽  
Human Skeleton ◽  
Animal Bones ◽  
Tennis Court ◽  
Made In ◽  
Neolithic Pottery

In the present state of our knowledge of the Neolithic period in England, and especially as regards its pottery, any light that can be thrown upon it is welcome, and it is on that account that I have brought before the Society a report on two discoveries of Neolithic remains: at Pangbourne, Berks., and Caversham, Oxon.It is greatly to be regretted that owing to the circumstances of the discovery accurate observations could not be made. In May, 1928, workmen were engaged in levelling ground to make a tennis court, at “Farmhili,” Courtlands Hill, Pangbourne, and in doing so came upon, and, as is unhappily so often the case, disturbed and partly smashed a human skeleton, other animal bones, of which a few only survive, and a large bowl of coarse pottery, definitely of Neolithic type. It would seem that when found the bowl was imore or less complete, but Mr. G. W. Smith, of Reading, who visited the spot the day after the discovery, was only able to find about two-thirds of the vessel, in fragments, on the rubbish heaps of excavated material. These fragments, together with the other remains, were presented by the owner of the land, Lt.-Com. W. S. Macilwaine, R.N., to the Reading Museum, where the writer had the opportunity of examining them.

scholarly journals Approaches to Visibility and Strategical Control of the Sierra Harana Schematic Rock Art (Granada, Spain)

2021 ◽  
Vol 31 ◽  
pp. 27-44
Author(s):  
Marcos Fernández Ruiz ◽  
Fernando Corbacho Gadella ◽  
Liliana Spanedda ◽  
Alberto Dorado Alejos
Keyword(s):  
Information Systems ◽  
Geographic Information Systems ◽  
Rock Art ◽  
Geographic Information ◽  
Neolithic Period ◽  
Strong Link ◽  
Water Springs ◽  
The Relationship ◽  
Hydrographic Network ◽  
Rock Shelters

An approach about territorial control and mobility in Sierra Harana (Granada, Spain) during Late Prehistory is presented in this paper, according to rock shelters with schematic rock art distribution. Different aspects have been analysed by using tools provided by Geographic Information Systems (GIS): the relationship between rock shelters and hydrographic network and water springs, and, mainly, their visual control. The association between rock shelters with schematic rock art and burial caves use during the Neolithic period is observed in the study area. A strong link between rock shelters and traditional pathways is also attested. These facts can be read as a way to mark symbolically certain routes that could be aimed to short transhumance practice. 

Octahedral occupancy and the chemical composition of diagenetic (low-temperature) chlorites

Clay Minerals ◽  
1991 ◽  
Vol 26 (2) ◽  
pp. 149-168 ◽  
Author(s):  
S. Hillier ◽  
B. Velde
Keyword(s):  
Chemical Composition ◽  
Low Temperature ◽  
Bulk Composition ◽  
Compositional Variation ◽  
Low Grade ◽  
Chemical Analyses ◽  
Method Of Calculation ◽  
Sedimentary Sequences ◽  
Wet Chemical ◽  
Potential Use

AbstractThe chemical composition of about 500 diagenetic chlorites, determined by electron microprobe, has been studied in six different sedimentary sequences spanning conditions from early diagenesis to low-grade metamorphism, in the temperature range 40–330°C. The range of Fe/(Fe + Mg) is almost complete and is positively correlated with Al. Five sequences show the same compositional variation. In each, the most siliceous chlorites have the lowest R2+, substantially more octahedral than tetrahedral Al, and the lowest octahedral totals. Conversely, the least siliceous have the highest R2+, nearly equal octahedral and tetrahedral Al, and octahedral totals close to that for an ideal trioctahedral mineral. A dioctahedral substitution Si[]R2−2 (where [] represents a vacant octahedral site) which decreases with temperature, describes this variation. Low octahedral totals are, however, induced by the method of calculation and need not indicate vacancies; for published wet chemical analyses of metamorphic chlorites they may simply indicate oxidation of Fe. Intergrown dioctahedral phyllosilicates may partly account for apparent vacancies in diagenetic chlorites. Nevertheless, the correlation of composition with temperature and similarities to the temperature-related evolution of synthetic chlorites, suggest that diagenetic chlorites are compositionally distinct from, but metastable with respect to, fully trioctahedral metamorphic chlorites. Temperature-related trends are modified by bulk composition, complicating their potential use for low-temperature geothermometry.

Sur la composition chimique moyenne des amphibolites

1953 ◽  
Vol S6-III (1-3) ◽  
pp. 153-173 ◽  
Author(s):  
Pierre Lapadu-Hargues
Keyword(s):  
Chemical Composition ◽  
Sedimentary Rocks ◽  
Point Of View ◽  
Igneous Rocks ◽  
Chemical Analyses ◽  
Average Chemical Composition ◽  
Composition Chimique

Abstract In a majority of cases, amphibolites derived from sedimentary rocks can be distinguished from those derived from dioritic or gabbroic igneous rocks on the basis of average chemical composition. From the purely chemical point of view, it is possible to consider that eclogites result from metamorphism of certain types of heteromorphic gabbros such as the ariegites,and ultimately give rise to amphibolitic rocks. Chemical analyses are included.

The petrology and chemical composition of a tholeiite sill on Schaapkraal 68JT, Lydenburg District, Transvaal, South Africa

1970 ◽  
Vol 37 (292) ◽  
pp. 909-915
Author(s):  
C. Frick
Keyword(s):  
South Africa ◽  
High Pressure ◽  
Chemical Composition ◽  
Chemical Analysis ◽  
Chemical Data ◽  
Chemical Analyses ◽  
Residual Glass ◽  
Iron Enrichment ◽  
Crystallization Differentiation

SummaryA glass-bearing dolerite, which consists of orthopyroxene phenocrysts (γ 1·689, α 1·678, β 1·680, 2Vα 81°, S.G. 3·35) and a glassy mesostasis (n 1·568, S.G. 3·25), is described petrologically. Three new chemical analyses are given. From the petrological and chemical data it can be concluded that the orthopyroxene formed under intratelluric conditions and probably under high pressure. According to the recalculated chemical analysis of the orthopyroxene 0·22 Al3+ is in the Y position and much less Al3+ in the Z position. The chemical analysis of the residual glass is compared with similar residual glasses, and it shows that iron enrichment characterizes the earlier stages of crystallization differentiation, whereas the later stages are marked by an increase in Si4+, K+, and Na+.

scholarly journals Rainbow trout (Salmo irideus) produced in Finland III. Seasonal variations in rainbow trout

1967 ◽  
Vol 39 (3) ◽  
pp. 133-141
Author(s):  
Jorma J. Laine ◽  
Elina Varesmaa ◽  
Fritz P. Niinivaara
Keyword(s):  
Rainbow Trout ◽  
Chemical Composition ◽  
Seasonal Variations ◽  
Coliform Bacteria ◽  
Chemical Analyses ◽  
Organoleptic Quality ◽  
Microbiological Analyses ◽  
Growth Experiments

Seasonal variations in rainbow trout were studied in four geographically different places of growth. Experiments were carried out in May, July, September and February. The fish was weighed and tested for approximate chemical composition, total and coliform bacteria, and organoleptic quality. Besides chemical and microbiological analyses, tests were made from the cultivating waters. The results indicated that the fish varied according to the season and place of growth. In chemical analyses the greatest differences occurred in the amounts of water and fat. The organoleptic quality of trout seemed, however, to be mostly influenced by the places of growth.

scholarly journals Conservation and technological-chemical analyses of metal artefacts from the bronze hoard from Jabłonka

2018 ◽  
Vol 9 ◽  
pp. 313-317
Author(s):  
Marcin Biborski
Keyword(s):  
Chemical Composition ◽  
Cutting Edge ◽  
Chemical Analyses ◽  
Plasma Chamber ◽  
Conservation Treatment ◽  
Metal Artefacts ◽  
Edge Method

The artefacts from Jabłonka were subjected to conservation treatment, including the application of a cutting-edge method of chlorine reduction in plasma chamber. In addition, technological-chemical analyses were carried out to determine the chemical composition of particular artefacts and identify the methods of their manufacture.

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