Full-text resources of CEJSH and other databases are now available in the new Library of Science.
Visit https://bibliotekanauki.pl

Results found: 2

first rewind previous Page / 1 next fast forward last

Search results

Search:
in the keywords:  colluvial sediments
help Sort By:

help Limit search:
first rewind previous Page / 1 next fast forward last
1

New perspectives on the dating of prehistoric soil erosion in loess areas

100%
Poreba G. J., Śnieszko Z., Moska P.
Sprawozdania Archeologiczne
|
2012
|
vol. 64
113-147
EN
This study presents the results of Optically Stimulated Luminescence (OSL) dating of colluvial sediment profiles from Biedrzykowice and Świerklany in the archaeologically well documented loess area of southern Poland, The method, the criteria for site selection and the limitations of the interpretation of the dates obtained are discussed. It is shown that Holocene colluvial sediments containing grains of quartz can be approximately dated using OSL. Despite its many limitations, it remains the only method suitable for direct dating of colluvial sediments. The obtained OSL dates are consistent with the archaeological evidence. The Biedrzykowice profile, located 6 km from the Neolithic settlement at Bronocice, contains two layers of Holocene colluvial sediments.The older layer, OSL dated to 6–5 ka BP, is separated from the younger, medieval layer dated to 1,0–0,5 ka BP by a fossil soil. In Świerklany, where there are no known prehistoric settlements, the accumulation of colluvial sediments only started in the medieval period. The OSL dating confirms earlier assumptions that in natural Holocene ecosystems in loess areas of the moderate climate forest zones, mineral material was not transported by slope wash, or only to a minimal extent. This work is the first direct isotopic dating of colluvial sediments in Poland.
2
Publication available in full text mode
Content available

Zagłębienia bezodpływowe obszarów lessowych Polski. Stan i perspektywy badań

58%
Kołodyńska-Gawrysiak R.
Acta Geographica Lodziensia
|
2017
|
vol. 106
105-116
PL
Zagłębienia bezodpływowe stanowią typowe formy rzeźby obszarów lessowych Europy, a ich geneza jest szeroko dyskutowana w literaturze. Artykuł prezentuje stan dotychczasowych badań, dotyczących zagłębień bezodpływowych obszarów lessowych Polski, istniejące hipotezy genetyczne oraz kierunki przyszłych badań. Dotychczas w literaturze opisane zostały cechy morfometryczne, rozmieszczenie i warunki geologiczne występowania tych form. W wybranych zagłębieniach zbadano gleby kopalne i osady koluwialne wypełniające formy. Zróżnicowane procesy (pierwotne i wtórne): deflacja, nierównomierna akumulacja lessu, sufozja, wyciskanie poziomów kurzawkowych, termokras były opisywane jako możliwe procesy morfogenetyczne. Zagłębienia bezodpływowe pełnią funkcję sedymentologicznych archiwów, umożliwiających rekonstrukcję naturalnych i antropogenicznych procesów zachodzących w przeszłości. Niezbędne są dalsze badania genezy i ewolucji zagłębień bezodpływowych. Pozwoli to na lepsze zrozumienie znaczenia okresu późnego glacjału i holocenu dla morfogenezy obszarów lessowych Europy.
EN
Closed depressions (CDs) are typical geomorphological features of the loess belts in Europe and their origin is highly debated in literature. This paper presents the current state of research on CDs in the loess belts in Poland. A review was conducted of several studies describing CDs. The existing genetic hypothesis and the scope of future research are described. Morphometric features of CDs, distribution and geological conditions were described in several publications so far. In the selected CDs, colluvial sediments and fossil soils were studied. Various processes (primary and secondary): deflation, uneven loess deposition, suffosion, extrusion of strongly saturated layers, thermokarst were reported as probable genetic processes. CDs act as important archives allowing a reconstruction of natural and anthropogenic processes operating in the past. More research is needed for a better understanding of the origin and evolution of CDs. This will help better understand the importance of the Late Glacial and Holocene stages for the morphogenesis of the loess belts in Europe.
first rewind previous Page / 1 next fast forward last
JavaScript is turned off in your web browser. Turn it on to take full advantage of this site, then refresh the page.