Heterogeneous extension and the role of transfer faults in the development of the southeastern Betic basins (SE Spain)

Tectonics ◽  
2014 ◽  
Vol 33 (12) ◽  
pp. 2467-2489 ◽  
Author(s):  
F. Giaconia ◽  
G. Booth-Rea ◽  
J. M. Martínez-Martínez ◽  
J. M. Azañón ◽  
F. Storti ◽  
...  
Keyword(s):  
Se Spain ◽  
Transfer Faults

THE ROLE OF CYTOKININS AND ETHYLENE INHIBITORS ON LENTICEL HYPERTROPHY GENERATION AND ETHYLENE PRODUCTION IN IN VITRO CULTURES OF POPULUS EUPHRATICA OLIVIER

1995 ◽  
Vol 43 (4) ◽  
pp. 339-345 ◽  
Author(s):  
M.D. Lledó ◽  
M.B. Crespo ◽  
J.B. Amo-Marco
Keyword(s):  
Ethylene Production ◽  
Populus Euphratica ◽  
In Vitro Cultures ◽  
Nodal Segments ◽  
Ethylene Inhibitors ◽  
Se Spain ◽  
Ethylene Formation ◽  
Free Media

Populus euphratica Olivier is native to the Irano—Turanian areas (Middle East). Elche (Alicante province, SE Spain) is known to be its only European location. Nodal segments from root shoots were established in vitro in a Murashige and Skoog medium supplemented with several cytokinins. Ethylene inhibitors AgNO3 and CoCl2 were used in combination with kinetin. Hormone-free media supplemented with sucrose (20–60 mg 1−1) was also tested. Ethylene was measured by gas chromatography, and both the percentage of sprouting shoots and lenticel hypertrophy in cultures were recorded. Ethylene production was higher in cultures supplemented with cytokinins (especially with meta-topolin), with high sprouting percentages, and lenticel hypertrophy. In cultures supplemented with 6-benzylaminopurine or 6-(γ,γ,-dimethylallylamino)-purine, ethylene production was lower and explants looked unhealthy. Ethylene formation was inhibited in cultures supplemented with AgNO3 (1 mg 1−1), which also decreased percentage of sprouting buds and lenticel hypertrophy.

The role of desalinisation to address aquifer overdraft in SE Spain

2014 ◽  
Vol 144 ◽  
pp. 247-257 ◽  
Author(s):  
David Martínez-Granados ◽  
Javier Calatrava
Keyword(s):  
Se Spain

Authigenesis of native sulphur and dolomite in a lacustrine evaporitic setting (Hellín basin, Late Miocene, SE Spain)

2011 ◽  
Vol 148 (4) ◽  
pp. 655-669 ◽  
Author(s):  
J. LINDTKE ◽  
S. B. ZIEGENBALG ◽  
B. BRUNNER ◽  
J. M. ROUCHY ◽  
C. PIERRE ◽  
...  
Keyword(s):  
Isotopic Composition ◽  
Late Miocene ◽  
Heterotrophic Bacteria ◽  
Carbon Isotopic Composition ◽  
Sulphate Reduction ◽  
Se Spain ◽  
Carbon Isotopic ◽  
Bacterial Sulphate Reduction ◽  
Strong Depletion

AbstractAbundant sulphur is present in the Late Miocene evaporitic sequence of the lacustrine Hellín basin in SE Spain. Weathering of Triassic evaporites controlled the chemical composition of the Miocene lake. The lacustrine deposits comprise gypsum, marlstones, diatomites and carbonate beds. Sulphur-bearing carbonate deposits predominantly consist of early diagenetic dolomite. Abundant dolomite crystals with a spheroidal habit are in accordance with an early formation and point to a microbial origin. The carbon isotopic composition of the dolomite (δ13C values between −10 and −4‰) indicates mixing of lake water carbonate and carbonate derived from the remineralization of organic matter by heterotrophic bacteria. Dolomite precipitated syngenetically under evaporitic conditions as indicated by high oxygen isotope values (δ18O between +6 and +11‰). Nodules of native sulphur are found in gypsum, carbonate beds and marlstone layers. Sulphur formed in the course of microbial sulphate reduction, as reflected by its strong depletion in34S (δ34S values as low as −17‰). Near to the surface many of the sulphur nodules were in part or completely substituted by secondary gypsum, which still reflects the sulphur isotopic composition of native sulphur (−18 to −10‰). This study exemplifies the role of bacterial sulphate reduction in the formation of dolomite and native sulphur in a semi-enclosed lacustrine basin during Late Miocene time.

Historical earthquakes in the Lower Segura basin (SE Spain): geological and archaeological evidence from pre-roman to modern times

2019 ◽  
Vol 62 (2) ◽  
pp. 247-269
Author(s):  
P.G. Silva ◽  
J.L. Giner-Robles ◽  
J. Elez ◽  
E. Roquero ◽  
M.A. Rodríguez-Pascua ◽  
...  
Keyword(s):  
Irrigation System ◽  
Historical Earthquakes ◽  
Environmental Damage ◽  
Secondary Effects ◽  
Se Spain ◽  
Blind Thrust ◽  
Estuarine Zone ◽  
Historical Times ◽  
Blind Thrust Fault

This paper deals with the analysis of ancient and historical earthquakes in the Lower Segura Depression (SE Spain) at the northern end of the Eastern Betic Cordillera Shear Zone (EBSZ), which is defined within the area by the Lower Segura blind-thrust fault. The work summarizes and updates the existing information on the building and environmental damage dispersed throughout several historical documents, as well as the new historical and archaeological research on the area. The analyses performed consider the evolving paleogeography of the old estuarine zone defined by Ibero-Roman "Sinus ilicitanus" and the ancient prograding delta of the Segura River over the marshes. Topographic data from old descriptions of the zone together with the analysis of the geometry of the medieval irrigation system in the growing delta from pre-Roman to modern (18th century) times, allow the paleogeographic evolution of the zone, until the eventual artificial infilling of the old embayment, to be outlined. Several strong earth- quakes (Intensity ≥ VIII EMS-98) occurred in the area during different historical times. Building damage for the different events was variable depending on the number of settlements (and increasing population) within the ancient embayment. Maximum Intensity X during the most recent earthquake (AD 1829 Torrevieja) mainly occurred over old lands reclaimed in the 18 th century. In addition, dominant earthquake secondary effects (EEEs) were caused by liquefaction processes. This study analyzes the dimensions and distribution of these EEEs for the two main earthquakes in the zone during the years AD 1048 and AD 1829 using the ESI-07 intensity scale. The results draw important inferences on the role of ancient paleo-geography in seismic hazard data from past earthquakes.

scholarly journals Disentangling the role of prefire vegetation vs. burning conditions on fire severity in a large forest fire in SE Spain

2020 ◽  
Vol 247 ◽  
pp. 111891 ◽  
Author(s):  
O. Viedma ◽  
F. Chico ◽  
J.J. Fernández ◽  
C. Madrigal ◽  
H.D. Safford ◽  
...  
Keyword(s):  
Forest Fire ◽  
Fire Severity ◽  
Se Spain

scholarly journals The role of near-field interaction between seismic waves and slope on the triggering of a rockslide at Lorca (SE Spain)

2012 ◽  
Vol 12 (12) ◽  
pp. 3631-3643 ◽  
Author(s):  
P. Alfaro ◽  
J. Delgado ◽  
F. J. García-Tortosa ◽  
J. J. Giner ◽  
L. Lenti ◽  
...  
Keyword(s):  
Seismic Waves ◽  
Near Field ◽  
Specific Interaction ◽  
Se Spain ◽  
Local Seismic Response ◽  
Geological Conditions ◽  
Seismic Amplification ◽  
Slope Instabilities ◽  
Near Field Effect

Abstract. A ~1000 m3 rockslide occurred close to Lorca (SE Spain) during the main shock (Mw = 5.1) of the May 2011 seismic sequence. The location of the rockslide, within 10 km of the earthquake epicenter and along the southern slope of a valley in which similar geological conditions occur on both slopes of the valley, suggests a significant near-field effect due to local seismic response. This could be related to the specific interaction between the topography and the obliquely propagating seismic waves. A dynamic stress strain numerical model was constructed using the FLAC 7.0 finite difference code to back analyze the Lorca rockslide event and relate its occurrence to both the local seismic amplification and the interaction between seismic waves and local topography. The results indicate that only for seismic waves with incidence angles in the range 0°–50° are the occurred slope instabilities expected. These results do not significantly change when varying the values for either stiffness or strength parameters within the range of the experimental data.

The role of topography and erosion in the development and architecture of shallow-water coral bioherms (Tortonian–Messinian, Cabo de Gata, SE Spain)

2009 ◽  
Vol 281 (1-2) ◽  
pp. 92-114 ◽  
Author(s):  
Raphaël Bourillot ◽  
Emmanuelle Vennin ◽  
Christophe Kolodka ◽  
Jean-Marie Rouchy ◽  
Antonio Caruso ◽  
...  
Keyword(s):  
Shallow Water ◽  
Se Spain ◽  
Water Coral ◽  
Coral Bioherms

The role of diagenesis and depositional facies on pore system evolution in a Triassic outcrop analogue (SE Spain)

2014 ◽  
Vol 51 ◽  
pp. 136-151 ◽  
Author(s):  
S. Henares ◽  
L. Caracciolo ◽  
G. Cultrone ◽  
J. Fernández ◽  
C. Viseras
Keyword(s):  
Pore System ◽  
Depositional Facies ◽  
Se Spain ◽  
System Evolution

The Role of Soil Seed Bank in the Early Stages of Plant Recovery After Fire in a Pinus Pinaster Forest in SE Spain

1996 ◽  
Vol 6 (1) ◽  
pp. 31 ◽  
Author(s):  
P Ferrandis ◽  
JM Herranz ◽  
JJ Martínez-Sánchez
Keyword(s):  
Seed Bank ◽  
Pinus Pinaster ◽  
Soil Seed Bank ◽  
Se Spain ◽  
Plant Recovery ◽  
Early Stages ◽  
Fire Effect ◽  
Species Establishment ◽  
Mediterranean Pine

The implication of the viable soil seed bank in the early stages of the plant recovery after fire was studied in a recently burnt Mediterranean pine forest of Pinus pinaster. Seed number contained in soil samples taken inmediately after fire and emergent seedling number recorded in the field during the subsequent year were compared. Although the fire effect was important, available seed density in the soil after fire was relatively high (around 2,200 seeds/m2). A small group of species containing the main shrub species in the unburnt community predominated both in the viable seed bank and field germination after fire. However, these species showed low germination rates in the field, as opposed to species with the lowest presence in the seed bark. The predominance of woody obligate seeders in the seed bark after fire and the high specific correspondence between seed bank and germination in the field, emphasize the important role of the seed bank contained in the soil before fire in the postfire species establishment.

The role of low-quality irrigation water in the desertification of semi-arid zones in Murcia, SE Spain

Geoderma ◽  
2003 ◽  
Vol 113 (1-2) ◽  
pp. 109-125 ◽  
Author(s):  
C. Pérez-Sirvent ◽  
M.J. Martı́nez-Sánchez ◽  
J. Vidal ◽  
A. Sánchez
Keyword(s):  
Irrigation Water ◽  
Arid Zones ◽  
Se Spain ◽  
Semi Arid
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