Fluvial vs. Aeolian origin of Pleistocene/Holocene dunes (South
Moravia, Czech Republic)

D 2017

Fluvial vs. Aeolian origin of Pleistocene/Holocene dunes (South Moravia, Czech Republic)

NEHYBA, Slavomír, Marie DVOŘÁKOVÁ and Jan PETŘÍK

Basic information

Original name

Fluvial vs. Aeolian origin of Pleistocene/Holocene dunes (South Moravia, Czech Republic)

Name in Czech

Fluviální nebo eolický původ pleistocenních až holocenních dun na lokalitě Pohansko

Authors

NEHYBA, Slavomír, Marie DVOŘÁKOVÁ and Jan PETŘÍK

Edition

Toulose, Francie, p. 645-645, 2017

Publisher

International Association of Sedimentologists

Other information

Language

English

Type of outcome

Stať ve sborníku

Field of Study

10500 1.5. Earth and related environmental sciences

Country of publisher

France

Confidentiality degree

není předmětem státního či obchodního tajemství

Publication form

electronic version available online

Organization unit

Faculty of Science

ISBN

2-907205-78-1

ISSN

Abstract

V originále

The archaeological locality Pohansko (South Moravia, Czech Republic) represents evidence of a significant Early Medieval centre in the core area of the Great Moravian Empire, 9th century AD (interpreted as a munitio, emporium and palatium of the Moravian Early Medieval rulers). The site lies at an altitude of about 155 to 157 m a. s. l. and is situated within an extended flood plain near the confluence of the Morava and Dyje rivers filled with Holocene flood loams. The beginning of flood loam sedimentation is estimated to be about 3000-4000 BP at the initial phase of the Subboreal period. The marginal slopes of the valley protrude some 5 m above the flood plain and are composed of Middle Pleistocene (Riss) fluvial sandy gravels with Late Würmian dunes. In some places these dunes also protrude from under Holocene flood loams in the flood plain; one of them was used to build the Early Medieval fortified site. Originally the sand dunes had a height of between 6 and 8 m, but recently because of younger flood loam deposits, they are only 1-2 m above the flood plain. Some lower dunes were even buried under the flood loams. The bedrock of the Quaternary deposits in the area of Pohansko is represented by grey clays of the Pannonian Age (8.5-11.5 Ma) of the Vienna Basin. The yellowish to brownish fine to medium grained sands forming the dunes are traditionally interpreted as eolian in origin formed by wind-blown sands. Artificial newly outcropped profiles produced during the archaeological research were subjected to detailed lithofacies analyses. Morphoscopy of quartz grains were studied in selected samples. Age interpretations are based on optically stimulated luminescence (OSL) analyses. Based on these results, fluvial units predominate in the sedimentary succession and the dunes are interpreted as levees and point-bars. Aeolian origin of some part (?) of Pleistocene/Holocene dunes is therefore questioned. The dune could have originated in the Dryas III (Late Würm), i.e. 12 000-17000 BP and partly resedimented in the Holocene.

Links

GA16-15678S, research and development project

Name: Vývoj interakce přírodního prostředí a subsistenční strategie raně středověké společnosti

Investor: Czech Science Foundation

Citovat

NEHYBA, Slavomír, Marie DVOŘÁKOVÁ and Jan PETŘÍK. Fluvial vs. Aeolian origin of Pleistocene/Holocene dunes (South Moravia, Czech Republic). Online. Toulose, Francie: International Association of Sedimentologists, 2017, p. 645. ISBN 2-907205-78-1.

@inproceedings{1390759,
   author = {Nehyba, Slavomír and Dvořáková, Marie and Petřík, Jan},
   address = {Toulose, Francie},
   howpublished = {elektronická verze "online"},
   language = {eng},
   location = {Toulose, Francie},
   isbn = {2-907205-78-1},
   note = {Nepřenášet do RIV, výsledek má jen 1 stranu textu, dle M17+ musí mít 2. Není na WoS ani Scopus.},
   pages = {645-645},
   publisher = {International Association of Sedimentologists},
   title = {Fluvial vs. Aeolian origin of Pleistocene/Holocene dunes (South Moravia, Czech Republic)},
   year = {2017}
}

TY  - JOUR
ID  - 1390759
AU  - Nehyba, Slavomír - Dvořáková, Marie - Petřík, Jan
PY  - 2017
TI  - Fluvial vs. Aeolian origin of Pleistocene/Holocene dunes (South Moravia, Czech Republic)
PB  - International Association of Sedimentologists
CY  - Toulose, Francie
SN  - 2907205781
N1  - Nepřenášet do RIV, výsledek má jen 1 stranu textu, dle M17+ musí mít 2. Není na WoS ani Scopus.
N2  - The archaeological locality Pohansko (South Moravia, Czech Republic) represents evidence of a significant Early Medieval centre in the core area of the Great Moravian Empire, 9th century AD (interpreted as a munitio, emporium and palatium of the Moravian Early Medieval rulers). The site lies at an altitude of about 155 to 157 m a. s. l. and is situated within an extended flood plain near the confluence of the Morava and Dyje rivers filled with Holocene flood loams. The beginning of flood loam sedimentation is estimated to be about 3000-4000 BP at the initial phase of the Subboreal period. The marginal slopes of the valley protrude some 5 m above the flood plain and are composed of Middle Pleistocene (Riss) fluvial sandy gravels with Late Würmian dunes. In some places these dunes also protrude from under Holocene flood loams in the flood plain; one of them was used to build the Early Medieval fortified site. Originally the sand dunes had a height of between 6 and 8 m, but recently because of younger flood loam deposits, they are only 1-2 m above the flood plain. Some lower dunes were even buried under the flood loams. The bedrock of the Quaternary deposits in the area of Pohansko is represented by grey clays of the Pannonian Age (8.5-11.5 Ma) of the Vienna Basin. The yellowish to brownish fine to medium grained sands forming the dunes are traditionally interpreted as eolian in origin formed by wind-blown sands. Artificial newly outcropped profiles produced during the archaeological research were subjected to detailed lithofacies analyses. Morphoscopy of quartz grains were studied in selected samples. Age interpretations are based on optically stimulated luminescence (OSL) analyses. Based on these results, fluvial units predominate in the sedimentary succession and the dunes are interpreted as levees and point-bars. Aeolian origin of some part (?) of Pleistocene/Holocene dunes is therefore questioned. The dune could have originated in the Dryas III (Late Würm), i.e. 12 000-17000 BP and partly resedimented in the Holocene.
ER  -

NEHYBA, Slavomír, Marie DVOŘÁKOVÁ and Jan PETŘÍK. \textit{Fluvial vs. Aeolian origin of Pleistocene/Holocene dunes (South Moravia, Czech Republic)}. Online. Toulose, Francie: International Association of Sedimentologists, 2017, p.~645. ISBN~2-907205-78-1.

Detailed Information on Publication Record