Influence of neotectonics on land surface evolution in the upper part of the Blue Nile Basin (Ethiopia): findings from a DEM

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985891%3A_____%2F19%3A00522973" target="_blank" >RIV/67985891:_____/19:00522973 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216208:11310/19:10405056

Výsledek na webu

<a href="http://www.aucgeographica.cz/index.php/aucg/article/view/162/122" target="_blank" >http://www.aucgeographica.cz/index.php/aucg/article/view/162/122</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.14712/23361980.2019.13" target="_blank" >10.14712/23361980.2019.13</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Influence of neotectonics on land surface evolution in the upper part of the Blue Nile Basin (Ethiopia): findings from a DEM

Popis výsledku v původním jazyce

The morphometric analysis of lineaments, valleys and signs of erosion taken from a digital elevation model (DEM) made it possible to not only confirm most of the conclusions of the morphotectonic development of the Blue Nile Basin from the previously published results of structural, petrological, tectonic and geochronological analyses, but also to expand our knowledge by applying several new hypotheses. The relative age of the morpholineaments of particular directions was estimated from the character of topographic profiles. Faults, lineaments and valleys are predominantly oriented in a direction compatible to the published concepts of the tectonic development of the area. Overall, the most abundant NE-SW and NNE-SSW lines reflect a change of extension from a NW-SE to WNW-ESE direction during the Pliocene, in relation to the creation and development of the Main Ethiopian Rift (MER). This is confirmed by a more developed character of the valleys and less pronounced erosion activity of the NE-SW oriented valleys contrary to the deeper narrower NNE-SSW valleys characterised by downward and headward erosion in the second direction. The most pronounced morphological manifestations of the E-W extension of the MER and western Afar during the Quaternary are confined to the borders of the MER. The directions of the Pre-Neogene rift structures to the NW-SE and WNW-ESE are compatible with the oldest elements of the current landscape and with the relict fragments of the valley network on the SE boundary of the upper Blue Nile Basin, which could have been drained across current shoulders of the MER to the S and E before the Late Miocene.

Název v anglickém jazyce

Influence of neotectonics on land surface evolution in the upper part of the Blue Nile Basin (Ethiopia): findings from a DEM

Popis výsledku anglicky

The morphometric analysis of lineaments, valleys and signs of erosion taken from a digital elevation model (DEM) made it possible to not only confirm most of the conclusions of the morphotectonic development of the Blue Nile Basin from the previously published results of structural, petrological, tectonic and geochronological analyses, but also to expand our knowledge by applying several new hypotheses. The relative age of the morpholineaments of particular directions was estimated from the character of topographic profiles. Faults, lineaments and valleys are predominantly oriented in a direction compatible to the published concepts of the tectonic development of the area. Overall, the most abundant NE-SW and NNE-SSW lines reflect a change of extension from a NW-SE to WNW-ESE direction during the Pliocene, in relation to the creation and development of the Main Ethiopian Rift (MER). This is confirmed by a more developed character of the valleys and less pronounced erosion activity of the NE-SW oriented valleys contrary to the deeper narrower NNE-SSW valleys characterised by downward and headward erosion in the second direction. The most pronounced morphological manifestations of the E-W extension of the MER and western Afar during the Quaternary are confined to the borders of the MER. The directions of the Pre-Neogene rift structures to the NW-SE and WNW-ESE are compatible with the oldest elements of the current landscape and with the relict fragments of the valley network on the SE boundary of the upper Blue Nile Basin, which could have been drained across current shoulders of the MER to the S and E before the Late Miocene.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10508 - Physical geography

Projekt

<a href="/cs/project/GCP209%2F12%2FJ068" target="_blank" >GCP209/12/J068: Výzkum svahových pohybů a eroze jako indikátoru morfotektonické aktivity Etiopské vysočiny založený na DPZ</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2019

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Acta Universitatis Carolinae- Geographica

ISSN

0300-5402

e-ISSN

—

Svazek periodika

54

Číslo periodika v rámci svazku

2

Stát vydavatele periodika

CZ - Česká republika

Počet stran výsledku

23

Strana od-do

129-151

Kód UT WoS článku

000504042100002

EID výsledku v databázi Scopus

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