Ebro Basin continental sedimentation associated with late compressional Pyrenean tectonics(north-eastern Iberia): controls on basin margin fans and fluvial systems

2001 ◽  
Vol 13 (1) ◽  
pp. 65-89 ◽  
Author(s):  
C. Arenas ◽  
H. Millán ◽  
G. Pardo ◽  
A. Pocoví
Keyword(s):  
Ebro Basin ◽  
Fluvial Systems ◽  
North Eastern ◽  
Basin Margin

New data on the sedimentary processes and timing of the initial inundation of Lower Khuzestan (SW Iran) by the Persian Gulf

The Holocene ◽  
2016 ◽  
Vol 27 (4) ◽  
pp. 613-620 ◽  
Author(s):  
Frieda Bogemans ◽  
Mathieu Boudin ◽  
Rindert Janssens ◽  
Cecile Baeteman
Keyword(s):  
Persian Gulf ◽  
Sedimentary Environment ◽  
Hard Water ◽  
Fluvial Systems ◽  
The North ◽  
Holocene Transgression ◽  
North Eastern ◽  
Sw Iran ◽  
Fluvial Sedimentation ◽  
The Persian Gulf

The early- and mid-Holocene deposits of the Lower Khuzestan plain at the north-eastern margin of the Persian Gulf have been investigated by means of facies analysis of sediment successions of undisturbed cores. Organic material and molluscs have been selected for dating by radiocarbon whereby possible contamination by hard-water effect is discussed. The results suggest that the Holocene transgression in Mesopotamia may have taken place later than generally accepted. Before ca. 7700–7900 yr cal. BP, the plain was characterized by mud-dominated fluvial systems. During the mid-Holocene, tides invaded the existing valleys, and the sedimentary environment shifted from fluvial to estuarine but not as extensively as has previously been suggested. The estuarine environments lasted for about 2000–2500 years until ca. 4850–5000 yr cal. BP when the seaward part of the plain was again characterized by widespread fluvial sedimentation.

Paleohydraulic investigation of the Ebro Basin: Implications for Mars

2021 ◽  
Author(s):  
Heath Geil-Haggerty
Keyword(s):  
Water Discharge ◽  
Sedimentary Basins ◽  
Mass Conservation ◽  
Sediment Supply ◽  
Sediment Flux ◽  
River Channels ◽  
Ebro Basin ◽  
Fluvial Systems ◽  
Sediment Size ◽  
Basin Scale

<p>The stratigraphy preserved in Earth’s sedimentary basins offers a record of how landscapes have evolved with time.  This stratigraphy provides insights into the dynamic processes that shaped the surface of the earth.  Fluvial stratigraphy contains many elements that can be used to recreate past conditions in ancient river channels.  Paleohydraulic reconstruction uses measurements of fluvial stratigraphy to model the conditions in the system that created them.  This allows us to answer questions related to water discharge, sediment flux, and duration of fluvial activity.  These are key questions when investigated in the context of Mars.  Paleohydraulic models can be used as compelling analogs for similar systems on Earth as well as Mars and other rocky planets.           </p><p>This study examines what the record of Oligocene-Miocene fluvial stratigraphy in northeastern Spain’s Ebro Basin can tell us about water discharge and sediment flux across distributive fluvial systems at a basin scale.  The Cenozoic stratigraphy of northeastern Spain’s triangular shaped Ebro Basin embodies a classic example of the formation of a closed sedimentary basin.  The Ebro Basin contains a number of remarkably well exposed fluvial sedimentary deposits.  These deposits outcrop as distinctive laterally contiguous channel sand bodies.  Clastic sediment supply in the Ebro Basin is largely governed by tectonic uplift and basin subsidence related to the Pyrenean orogen with peripheral contributions from the Catalan Coast and Iberian Ranges.  We test the idea that the record of conditions in the fluvial systems should reflect the record of lacustrine chemical sediments through sediment mass conservation.  In order to test this hypothesis measurements of bedform height, barform height, sediment size, and paleochannel dimensions were collected in the field.  Our paleohydraulic model uses previously derived theoretical and empirical relationships to recreate the conditions in these ancient fluvial systems.  These results are scaled up by accounting for drainage density and intermittency in order to address the principal question at a basin scale.  Paleodischarges from the fluvial sediments are comparable to those from river chemistry calculations for the lacustrine facies. </p>

Palaeoshoreline for the Late Cretaceous marine platform in the Iberian Trough (Leonese Area, Spain) deduced from outcrop and subsurface analysis

2012 ◽  
Vol 4 (3) ◽  
Author(s):  
Antonio Herrero-Hernández ◽  
Fernando Gómez-Fernández
Keyword(s):  
Late Cretaceous ◽  
Seismic Analysis ◽  
Proximal Portion ◽  
Fluvial Systems ◽  
Depositional Sequences ◽  
Base Level ◽  
Isopach Maps ◽  
History Of ◽  
Marine Platform ◽  
Basin Margin

AbstractThe location of the Late Cretaceous paleoshoreline in the Leonese Area (Iberian Trough, Spain) has been investigated by seismic analysis through isobath and isopach maps.The succession can be divided into two depositional sequences: DS-1 and DS-2. These sequences are composed of fluvial systems at the base, with paleocurrents that flowed eastward and north-eastward. The DS-1 sequence (Late Albian-Middle Turonian) shows intertidal to subtidal and offshore deposits at the top, while the DS-2 sequence (Late Turonian-Campanian) presents intertidal to subtidal, tidal flat and shallow marine and lacustrine deposits at its top.The stratigraphic cyclicity based on systems tracts shows that these two depositional sequences exhibit remarkable eustatic control. Both sequences start at the base with a significant sedimentary supply from fluvial systems, related to eustatic fall episodes, and conclude at the top with transgressive periods. The evolution of the basin reveals the history of base-level changes and associated shifts in depositional trends during successive stages.The deeper sectors of the DS-1 sequence are located towards the northeastern part of the study area while the proximal portion of the basin-margin is located to the southwest. The paleoshoreline is placed in a direction oriented at 120. The variations in thickness are elongated in orientations between 030 and 050 and are mainly related to paleovalleys and tributary fluvial networks that supply sediment through the shoreline. It is possible that these variations may be related to active synsedimentary faults.Depocenters move toward the northeast and east during the DS-2 sequence while the proximal portion of the basin-margin moves to the southwest. The paleoshoreline has an orientation of 155 direction and moves basinward. The isopach maps show a group of corridors oriented at 130–140 and 165–170, interpreted as result of accumulation of sandy bodies such as inter and subtidal bars. The fluvial systems are transversal to the paleoshoreline direction.

scholarly journals A New Species of Glirid RodentVasseuromysfrom the Aragonian (Miocene) of the Ebro Basin (North-Eastern Spain)

2012 ◽  
Vol 57 (2) ◽  
pp. 225-239 ◽  
Author(s):  
Francisco J. Ruiz-Sánchez ◽  
Xabier Murelaga ◽  
Matthijs Freudenthal ◽  
Juan C. Larrasoańa ◽  
Miguel Garcés
Keyword(s):  
New Species ◽  
Ebro Basin ◽  
North Eastern ◽  
A New Species

Architecture of an Oligocene fluvial ribbon sandstone in the Ebro Basin, North-eastern Spain

Sedimentology ◽  
2009 ◽  
Vol 57 (3) ◽  
pp. 845-856 ◽  
Author(s):  
GUSTAVO GONZÁLEZ-BONORINO ◽  
FERNANDO COLOMBO ◽  
LILIANA ABASCAL
Keyword(s):  
Ebro Basin ◽  
North Eastern

scholarly journals Stratigraphic forward modelling of distributive fluvial systems based on the Huesca System, Ebro Basin, Northern Spain

2021 ◽  
Author(s):  
Swiad Snieder ◽  
Cedric M. Griffiths ◽  
Amanda Owen ◽  
Adrian J. Hartley ◽  
John A. Howell
Keyword(s):  
Forward Modelling ◽  
Northern Spain ◽  
Ebro Basin ◽  
Fluvial Systems

scholarly journals Patterns of occurrence of semi-aquatic reptiles in highly invaded Mediterranean rivers

NeoBiota ◽  
2018 ◽  
Vol 38 ◽  
pp. 23-35
Author(s):  
Daniel Escoriza
Keyword(s):  
Alien Species ◽  
Mediterranean Rivers ◽  
Fluvial Systems ◽  
Widespread Occurrence ◽  
North East ◽  
The North ◽  
North Eastern ◽  
Freshwater Fauna ◽  
Disturbed Habitats ◽  
Habitat Generalists

The fluvial systems in the north-east of the Iberian Peninsula are highly disturbed habitats, with widespread occurrence of alien species. Previous studies have shown that alien species have a major impact on native freshwater fauna, but it is not known what effect they have on semi-aquatic reptiles. Here the author investigated the factors that influence the occurrence of three species of semi-aquatic reptiles, one turtle (Mauremysleprosa) and two snakes (NatrixastreptophoraandNatrixmaura), at 261 sites in seven rivers/streams in Girona (north-eastern Spain). The studied semi-aquatic reptiles are habitat generalists which can occupy sections of rivers with altered regimes. The relationships of reptile presence to abiotic niche parameters and the presence of alien species were evaluated, as well as the patterns of pairwise co-occurrence between the reptiles. The presence of alien species did impact one out of three reptiles in this community. The association between both species of natricines was weakly negative, suggesting that interspecific competition does not structure their co-occurrences. The removal of alien species is the most appropriate strategy to preserve the complete diversity of native semi-aquatic reptiles.

Evolution of the central part of the northern Ebro basin margin, as indicated by its Tertiary fluvial sedimentary infill

1996 ◽  
pp. 166-172 ◽  
Author(s):  
P. F. Friend ◽  
M. J. Lloyd ◽  
R. McElroy ◽  
J. Turner ◽  
A. Van Gelder ◽  
...  
Keyword(s):  
Ebro Basin ◽  
Basin Margin
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