Palaeostresses associated with thrust sheet emplacement and related folding in the southern central Pyrenees, Huesca, Spain

1995 ◽  
Vol 152 (2) ◽  
pp. 353-364 ◽  
Author(s):  
B. MARTINEZ-PEÑA ◽  
A. M. CASAS-SAINZ ◽  
H. MILLAN-GARRIDO
1995 ◽  
Vol 152 (6) ◽  
pp. 1053-1054
Author(s):  
J. P. Turner ◽  
P. L. Hancock ◽  
M. B. Martínez-Peña ◽  
A. M. Casas-Sainz ◽  
H. Millán-Garrido

1994 ◽  
Vol 21 (3) ◽  
pp. 73-76 ◽  
Author(s):  
E. Gili ◽  
Enric Vicens ◽  
A. Obrador ◽  
Peter William Skelton ◽  
Gregorio López

The Holocene ◽  
2021 ◽  
pp. 095968362110332
Author(s):  
Valentí Rull ◽  
Núria Cañellas-Boltà ◽  
Teresa Vegas-Vilarrúbia

Palynological analysis of the last ca. 4300 cal year BP using a sediment core taken from high mountain (ca. 1900 m elevation) Lake Sant Maurici sediments (southern-central Pyrenees) showed remarkable vegetation constancy during the Bronze Age and the Middle Ages. Records of the Iron Age and the Roman period were missing due to a major sedimentary gap. During the studied periods, the vegetation around the lake was largely dominated by pine ( Pinus) forests with birch ( Betula), oak ( Quercus) and hazel ( Corylus) trees, as is the case today. The composition of these forests and the abundance of their components remained quite stable, despite the occurrence of temperature and moisture shifts. The degree of human disturbance, notably that of pastoralism and cereal cultivation by scattered and temporary settlements, was very low and had little or no effect on the dominant forests. This situation contrasts with most high-elevation (subalpine and alpine) environments of the central Pyrenees that were massively anthropized during the Middle Ages. Further research should be aimed at finding sediments corresponding to the Iron Age and the Roman period to verify whether the vegetation constancy can be extended throughout the Late-Holocene. Past records of this type may allow the estimation of natural and anthropogenic thresholds for irreversible forest changes, which would be useful for conservation purposes.


2021 ◽  
Vol 7 (1) ◽  
pp. 1015-1034
Author(s):  
Ermengol Gassiot-Ballbè ◽  
Niccolò Mazzucco ◽  
Sara Díaz-Bonilla ◽  
Laura Obea-Gómez ◽  
Javier Rey-Lanaspa ◽  
...  

Abstract After years of intense fieldwork, our knowledge about the Neolithisation of the Pyrenees has considerably increased. In the southern central Pyrenees, some previously unknown Neolithic sites have been discovered at subalpine and alpine altitudes (1,000–1,500 m a.s.l.). One of them is Cueva Lóbrica, 1,170 m a.s.l., which has an occupation phase with impressed pottery dated ca. 5400 cal BCE. Another is Coro Trasito, 1,558 m a.s.l., a large rock shelter that preserves evidence of continuous occupations in the Early Neolithic, 5300–4600 cal BCE. Evidence of human occupation at higher altitudes has also been documented. In the Axial Pyrenees, at the Obagues de Ratera rock shelter, 2,345 m a.s.l., an occupation has been dated to around 5730–5600 cal BCE. At Cova del Sardo, in the Sant Nicolau Valley, at 1,780 m a.s.l., a series of occupations have been excavated, dated to ca. 5600–4500 cal BCE. These sites allow us to discuss patterns of occupation of the mountainous areas between the Late Mesolithic and Early Neolithic. Recent data suggest that the last hunter–gatherer occupied all altitudinal stages of the Pyrenees, both in the outer and inner ranges. A change in the settlement pattern seems to have occurred in the Early Neolithic, which consisted of a concentration of occupations in the valley bottom and mid-slopes, in biotopes favourable to both herding and agriculture.


Author(s):  
P. Clariana ◽  
R. Soto ◽  
C. Ayala ◽  
A. M. Casas-Sainz ◽  
T. Román-Berdiel ◽  
...  

AbstractA new gravity survey (1164 gravity stations and 180 samples for density analysis) combined with two new geological cross sections has been carried out in a sector of the Central Pyrenees in order to improve the characterization of basement and cover architecture. From North to South, the study area comprises the southern half of the Axial Zone and the northernmost part of the South-Pyrenean Zone. New gravity data were combined with previous existing databases to obtain the Bouguer and residual anomaly maps of the study area. The two cross sections, oriented NNE–SSW, were built from field data and previous surficial and subsurface data and cross the La Maladeta plutonic complex. The residual anomaly map shows values ranging from −18 to 16 mGal and anomalies mainly oriented N120E. The two 2.5D modelled cross sections show similar observed gravity curves coinciding with similar interpreted structural architecture. Data show a gravity high oriented N120E coinciding with the Orri basement thrust sheet and an important gravity depression, with the same orientation, coinciding with the leading edge at depth of the Rialp basement thrust sheet and interpreted as linked to a large subsurface accumulation of Triassic evaporites. The volume at depth of the La Maladeta and Arties granites has been constrained through gravity modelling. This work highlights that the combination of structural geology and gravity modelling can help to determine the structural architecture of an orogen and localize accumulations of evaporites at depth.


CATENA ◽  
2017 ◽  
Vol 149 ◽  
pp. 668-688 ◽  
Author(s):  
Penélope González-Sampériz ◽  
Josu Aranbarri ◽  
Ana Pérez-Sanz ◽  
Graciela Gil-Romera ◽  
Ana Moreno ◽  
...  

1990 ◽  
Vol VI (2) ◽  
pp. 265-271 ◽  
Author(s):  
J. Verges ◽  
J. A. Munoz

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