Browsing by Subject "sedimentology"

Now showing 1 - 5 of 5

Access status: Open Access ,
Evaluation of geochemical anomalies detected in the Boda Claystone Formation
(Wydawnictwa AGH, 2016) Nádasi, János; Mádai, Viktor; Földessy, János
The Boda Claystone Formation (BCF) is a sedimentary complex researched for decades (Barabásné Stuhl 1981, Fülöp 1994, Varga 2009, Halász 2011).
Access status: Open Access ,
Geology, sedimentology and mineralogy of the Tell el Farkha site, the Eastern Nile Delta, Egypt
(2010) Pawlikowski, Maciej ; Wasilewski, Michał
Access status: Open Access ,
Niektóre zjawiska geologiczne w stanowiskach archeologicznych na przykładzie stanowiska w Dzierżysławiu. Komunikat
(Wydawnictwa AGH, 2007) Pawlikowski, Maciej
This paper presents field and laboratory investigations concerning artefacts sinking in archaeological sites. These phenomena take place on most of archaeological sites. Most probably this process affect all categories of artefacts. Because of the time stone age sites are the best places to investigate sinking of artefacts. The correct interpretation of archaeological facts on the site could be based only on consciousness of the processes mentioned in this article. The particular example used here is Dzierżysław Magdalenian site and excavations on it as well as laboratory tests with »contemporaneous« flint flakes. Experiments concerning migration of artefacts confirmed various rate of their migration. Phenomenon is the result of shape of implements their weight as well as conditions at sediment. Small and flat objects migrated down slowly while isometric and heavy, faster. Was observed that during sinking tested objects did complicated motions. This suggest that artefacts discovered at archaeological sites are at various stages of migration. Moreover one can see that mentioned »activity« of objects is often various at various parts of one archaeological site.
Access status: Open Access ,
Sedimentary structures as indicator of natural processes and human activity, Tell el Farcha aechaeological site, Nile Delta, Egypt
(2010) Pawlikowski, Maciej
Access status: Open Access ,
The Late Quaternary vegetational and environmental history of western tropical Africa - the eastern Benin Basin, Lagos, Nigeria
(Wydawnictwa AGH, 2017) Adeonipekun, Peter Adegbenga; Adeniyi, Tiwalade Adeyemi; Mateawo, Jacob; Agbalaya, Biola
A palynological study of a 30 m borehole within the Akoka campus of the University of Lagos, Akoka, Nigeria revealed Late Quaternary paleo-vegetational, climatic and environmental changes. Sixteen samples at a regular interval of 2 m were subjected to standard palynological and sedimentological techniques. Six pollen zones representing six paleoclimatic phases within the Late Quaternary period were recognized. The age model is based on two radiocarbon dates (6 m: 5,495 $\pm$ 25 $^{14}$C yr and 12 m: 15,660 $\pm$ 40 $^{14}$C yr) and, by extrapolation, the sequence spans approximately the last 35,000 yr BP. The African maximum transgression and the African Humid Period (wet paleoclimate maximum) – the Nouaktchottian, and Pre-Nouaktchottian respectively – were recognized, while the Ogolian II (Erg II) was stratigraphically recognized and the Upper Inchirian extrapolated. Recovered diatom frustules with other proxies were employed for paleoclimatic and paleoecological deductions. Four hydrological cycles and three paleoecological settings were identified. Results from this work indicate the co-eval record of paleoclimatic events across Africa, suspected cooling during the African maximum transgression in Nigeria and the usefulness of coastal freshwater swamp sediments for paleoclimate studies.