Amelia Gómez-Villar

Amelia Gómez-Villar
Universidad de León | UNILEON · Department of Geography and Geology

PhD in Physical Geography

About

135
Publications
33,842
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1,387
Citations
Additional affiliations
March 1996 - May 2016
Universidad de León
Position
  • Professor (Associate)

Publications

Publications (135)
Article
Full-text available
Air and near-surface ground temperatures were measured using dataloggers over 14 years (2006-2020) in 10 locations at 2262 to 2471 m.a.s.l. in a glacial cirque of the Cantabrian Mountains. These sites exhibit relevant differences in terms of substrate, solar radiation, orientation, and geomorphology. Basal temperature of snow (BTS) measurements and...
Article
Full-text available
During the Late Pleistocene, the main mountain ranges of the Iberian Peninsula were covered by small icefields and cirque and alpine glaciers. The deglaciation triggered paraglacial processes that generated landforms, mostly within the ice-free glacial cirques. In this research we analyse the deglaciation process in the Muxivén Cirque (42°15′N – 6°...
Chapter
The Montes de León (northwest Spain) include the Aquilanos Mountains (2142 m), the Teleno Mountains (2182 m), and the Sierra de la Cabrera (2121 m), which are Paleozoic mountains with a predominance of slate and quartzite. During the maximum glacial advance, 94 small cirque and valley glaciers (up to 9 km long) occupying c. 116 km² were formed in t...
Chapter
Knowledge about the glacial geomorphology in the Leonese Cantabrian Mountains is synthesized in this chapter. After the Pyrenees, the Leonese Cantabrian Mountains hosted the largest glaciers in Iberia, with an ice surface extent exceeding 1200 km² and 22 glaciers with ice tongues >10 km. The largest glacier complexes developed in the valleys of the...
Article
Full-text available
Mining activity introduces severe changes in landscapes and, subsequently, in land uses. One of the most singular changes is the existence of pit lakes, which occur in active and, more frequently, abandoned mines. Pit lakes are produced by water table interception when open-pit mines deepen. Their characteristics are highly variable, depending on t...
Conference Paper
ABSTRACT The open pit mines produce drastic changes in the relief and in the landscapes where they are located. These changes depend on the size of the exploitations, the exploitation systems and the type of mineral extracted. The gold mining carried out by the Romans in the province of León required the mobilization of large volumes of rock to ext...
Preprint
Full-text available
Mining activity introduces severe changes in landscapes and, subsequently, in land uses. One of the most singular changes is the existence of pit lakes, which occur in active and, more frequently, abandoned mines. Pit lakes are produced by water table interception when open-pit mines deepen. Their characteristics are highly variable, depending on t...
Article
Dam-failure floods typically involve greater peak discharge than the largest meteorological flood at a basin. Determining the geomorphic effectiveness of extreme flooding caused by a breach mechanism provides insight into the role of flood scale on the resulting processes and landforms. Here, we present a geomorphological and hydraulic analysis of...
Article
The objective of this study was to assess whether it is possible to obtain a comprehensive record of the last deglaciation from the small Peña Negra glacial cirque in a marginal mountain range in the Iberian Range (northern Iberian Peninsula). The cirque is located in Sierra Cebollera, at an elevation slightly over 2000 m a.s.l. in the divide, and...
Article
With an extensive and high elevation surface (1800-1900 m a.s.l.), the Sancenas karst massif (Cantabrian Mountains) was home to a small icefield developed during late Pleistocene times. Glacial and karst processes are dominant in this region, generating many glaciokarst landforms which are uncommon in the glaciated mountains of Spain. Well-preserve...
Article
Relict rock glaciers are widespread in the Cantabrian Mountains, with more than 250 lobate, tongued‐shaped and complex landforms identified. Located mostly within glacial cirques, facing north and northeast, these landforms are indicative of the distribution of ancient permafrost. Macro‐fabric analysis allows us to reconstruct the past dynamics of...
Chapter
Full-text available
En la provincia de León existen numerosas lagunas de pequeño tamaño localizadas en diversos ámbitos geográficos. En este trabajo, se analizan los principales orígenes que explican su presencia, tanto para aquéllas que son naturales como para las de origen antrópico. Así, en las áreas de montaña son frecuentes las lagunas de origen glaciar, que pued...
Article
Deglaciated mountainous areas are usually affected by a great range of paraglacial processes that involve progressively denudation of glacial imprints. This study focuses on paraglacial processes and glacial landform preservation in six zones located in two catchments of the Cantabrian Mountains (NW Spain). These zones are adjacent but display impo...
Poster
Full-text available
The Demanda Sierra, at altitudes above 2000 m.a.s.l., is located in the Iberian Range (Northern Iberian Peninsula, 42º15' N). The main divide extends from west to east between 3º25' W and 2º52' W. The most relevant evidences of Pleistocene glaciation are found in small cirques above 1800 m a.s.l., most of them in the northern face. These cirques ho...
Article
Full-text available
The montane and subalpine belts in European mountains were affected by intense land use/land cover changes during the twentieth century. In the case of the subalpine belt, most European mountains were affected by complex deforestation processes from Neolithic times, leading to the expansion of summer grasslands to support grazing by transhumant she...
Article
Full-text available
Landforms resulting from the interaction between paleo-glaciers and karst are studied by using the Sierra de los Grajos (Cantabrian Mountains) as a model. This area contains glacial landforms that have not interested geomorphologists due to their low altitude (Peña Castillo is about 1857 m a.s.l.), the absence of glacial cirques and the scarcity of...
Article
In this study the spatial distribution of shallow landslides in the upper montane and subalpine belts of the Urbión Mountains (Iberian Range, northern Spain) was investigated, particularly in relation to the spatial organization of deforestation and land cover. The upper montane and subalpine belts have been deforested several times since the Neoli...
Article
In this study, fossil debris-covered glaciers are investigated and dated in the Sierra de la Demanda, northern Spain. They are located in glacial valleys of approximately 1 km in length, where several moraines represent distinct phases of the deglaciation period. Several boulders in the moraines and fossil debris-covered glaciers were selected for...
Poster
Full-text available
El estudio de las formas periglaciares es importante porque indica unas condiciones medioambientales en las áreas montañosas a caballo entre el último periodo frío cuaternario y las presentes. Su significado paleo-climático es máximo en un contexto actual de calentamiento global en el que algunas dinámicas residuales aún persisten. En la provincia...
Poster
Full-text available
El estudio de las formas periglaciares es importante porque indica unas condiciones medioambientales en las áreas montañosas a caballo entre el último periodo frío cuaternario y las presentes. Su significado paleo-climático es máximo en un contexto actual de calentamiento global en el que algunas dinámicas residuales aún persisten. En la provincia...
Article
Full-text available
The article presents the 1:25,000-scale geomorphological map of the upper reaches of the Curueño River, on the southern slope of the Central Cantabrian Mountains, NW Spain. The study area spans approximately 125 km2 and corresponds to the 1:25,000-scale Spanish National Topographical Map Sheet 104-I of Lugueros. The area is moderately mountainous w...
Article
Changes in land use related to mining in the north-western mountains of Spain are analysed. We studied 15 representative types of mining activity in the Sil River basin (León province), including three types of mineral resources: gravel, roofing slate and coal. We use colour orthopothos of 2014 to calculate areas occupied by dumps, lagoons, open pi...
Article
Full-text available
This paper is a synthesis of the landscape, geomorphic and functional evolution of the subalpine belt in the Urbión Sierra, providing a geoecological perspective of the interactions between human activity, spatial organization, geomorphological dynamics and recent land use changes. Landscape changes in the subalpine belt started at least during the...
Article
Full-text available
Los bloques aradores son una de las formas periglaciares más características de las montañas ibéricas, pero los estudios específicos sobre los mismos son muy escasos. En este trabajo se presentan datos de medio centenar de bloques de dos enclaves del noroeste ibérico: el Alto Sil (Cordillera Cantábrica) y el macizo de Vizcodillo (Sierra de la Cabre...
Conference Paper
Full-text available
Approximately 180 relict lobate and tongue-shaped rock glaciers are widespread in the Cantabrian Mountains, indicating past permafrost distribution in these mid-latitude mountains. They ere primarily located within glacial cirques, facing north and northeas, at the foot of quarzites and sandstones escarpments and over 1600 m, with some exceptions....
Article
Channel changes are the consequence of changes in sediment yield from the slopes and in the connectivity between slopes and channels because of distinct land use and climate impacts. In this study we investigated the characteristics and evolution of a short reach in the headwater of the Ijuez River, central–southern Pyrenees. Assessment of a series...
Article
Full-text available
El Dryas Reciente ( Younger Dryas ) (GS-1, entre 12,9 y 11,7 ka BP) se caracterizo por un marcado descenso de la temperatura a escala global. La consecuencia fue un re avance de los glaciares que afecto tambien a las cordilleras mas importantes de la Peninsula Iberica. Este trabajo revisa la informacion disponible sobre la localizacion, evolucion y...
Article
We review the evolution of glaciers in the Iberian Mountains during the Younger Dryas (12.9–11.7 ka, following the chronology of Greenland Stadial 1 – GS1) and compare with available environmental and climate data to investigate glacier dynamics during cold stadial episodes. The best examples of Younger Dryas moraines are found in the Central Pyren...
Article
The conversion of subalpine forests into grasslands for pastoral use is a well-known phenomenon, although for most mountain areas the timing of deforestation has not been determined. The presence of charcoal fragments in soil profiles affected by shallow landsliding enabled us to date the occurrence of fires and the periods of conversion of subalpi...
Article
Full-text available
Depopulation in Spanish mountain areas and livestock decrease, which traditionally grazed pasture lands, have favored an uncontrolled expansion of shrubs and, consequently, a significant increase of the fuel material and the fire risk, and the decrease of the landscape diversity. In the Cantabrian Mountain, Cytisus scoparius shows a large capacity...
Article
Full-text available
We review the effects of climate variability and land use / land cover changes in the Central Spanish Pyrenees at different spatial and temporal scales. Paleoclimatic studies based upon multi-proxy analyses of lacustrine, glacial and speleothematic deposits, among others, have demonstrated the occurrence of intense climatic fluctuations not only du...
Article
Full-text available
The La Balouta Valley, located in the extreme SW region of the Las Médulas Natural Monument and UNESCO World Heritage Site (León, Spain), is one of the largest gold-mining sites developed by Romans more than 2,000 years ago when excavating a thick series of red Miocene sediments in the area. The main determining feature of the La Balouta Valley, es...
Article
A total of 156 glacial cirques located on two different areas in the Cantabrian Mountains (NW Spain) were identified and measured in order to continue and expand the study of these large-scale erosional forms in European mountains. Environmental variables that may explain cirque distribution (altitude, aspect and lithology), and their most importan...
Article
Full-text available
El lago de La Baña se localiza en la cabecera del Valle del Lago, en un entorno con numerosos restos glaciares que indican una ocupación por el hielo relativamente extensa. Debido a ello, este lago se consideró de origen glaciar ya que se identificó como morrena la acuulación de grandes bloques que lo obtura. Sin embargo, el análisis sedimentológic...
Article
Full-text available
New data about the La Baña Lake origin (Cabrera Range, NW Spain) using geomorphological and sedimentological analysis. La Baña lake is located in the upper part of a glacial valley. Due to glacial morphology in the surroundings, the lake-dammed deposit, composed by big slate boulders, was considered a moraine. Macrofabric and sedimentology analysis...
Chapter
Se presentan los datos de temperatura del suelo y del aire de varios enclaves en el entorno de dos glaciares rocosos en el circo del Cerro Krund (Tierra del Fuego, Argentina), a altitudes de entre 750 y 885 m. Los datos obtenidos, junto a las observaciones realizadas en la zona y la dinámica observada entre 2004 y 2010 evidencian que el más elevado...
Chapter
Full-text available
In the Chile-Argentina border (35º55’S-70º22’W), around Cerro Campanario there are several rock glaciers developed over a glacial landscape that are partially fossilized by wind sediments accumulations. This is a striking example of the succession of geomorphic processes and spatial convergence of the resulting landforms, since the structural volca...
Chapter
RESUMEN En el área de estudio, que va desde el valle del río Pisuerga por el E hasta el del río Burbia por el O, se estudia la localización de un conjunto de formas de relieve y elementos de diverso tamaño de origen glaciar. Estos restos tienen un carácter heredado y son indicios del funcionamiento de sistemas morfo-climáticos de los paleoclimas, i...
Article
Full-text available
The dynamics of the torrential upper reach of the Ijuez River, Central Spanish Pyrenees, was analyzed in relation to the spatial organization of grain size. The reach is located in the Eocene flysch, which usually acts as a high sediment production area, particularly during periods of intense human activity. The Ijuez Valley was cultivated and dens...
Article
Free link to article: http://www.tandfonline.com/eprint/3Dqh9CSTgYXigxpIgK3h/full Fabric and grain-size analysis of eight deposits present in the Upper Sil River Basin palaeoglacial system of northwest Spain were used to interpret till types and to reconstruct the glacial paleoprocess history of this region. They are represented by lodgement, defo...
Article
Full-text available
La distribución de varios restos de origen glaciar a lo largo del valle de Viadangos de Arbás (Norte de León, Cordillera Cantábrica, España) demuestra su ocupación por el hielo al menos durante el último periodo glaciar. Los restos obedecen a distintos mecanismos ejercidos por el flujo del hielo y a procesos yuxtaglaciares (antiguas lagunas) y para...
Article
Several glaciers developed in the Cantabrian Mountains (NW Spain) during the last glacial maximum (LGM). In the last 15 years, several studies of glacial geomorphology have increased the knowledge about the limits of the glaciation, but little data are available about many valleys, especially on the northern slope, due to extensive postglacial eros...
Article
Debris flows occurred three weeks after a wildfire in August 1986 in the Najerilla River valley in the Iberian Range, northern Spain. The flows were triggered by a brief, intense rainstorm (approximately 25 mm h−1 over 15 min) in a small area with steep slopes covered by a thick colluvium of quartzite clasts. This storm resulted in the development...
Article
Full-text available
Las formas de relieve son el resultado de la acción de un con-junto de procesos que actúan bajo determinadas condiciones ambientales, es decir, bajo diferentes tipos de clima que configuran los sistemas morfoclimá-ticos. A lo largo del tiempo geológico se suceden sobre un mismo espacio diferentes sistemas climáticos cuyo resultado es la superposici...
Article
Full-text available
From 2003 to 2009 it has been tracked snowpatches in Alto Sil, in the Cantabrian Mountains. This work allowed us to locate 8 nivation hollows in this area. Currently 6 of them could be considered as active and 2 of them as inactive. A more detail study around Joyas del Nevadín and Valdeiglesia nivation hollows, allowed us to check the snow erosion...
Article
Spanish mountains have been affected by the expansion of shrubs and forests since the mid-20th century. This secondary succession in vegetation has some positive effects, but also drawbacks, such as an increase in fire risk, loss of diversity in land use, a reduction in landscape and cultural value, less water available in river channels and reserv...
Article
In the southwestern extreme of the León province (Spain), is located the Natural Monument of LaBaña lake. Its main value is constituted, on the one hand, by the clear glacial morphology, characterized by the presence of a large cirque, rock basins and moraines, and, in a second hand and more relevant, the presence of La Baña lake, the biggest lake...
Article
Full-text available
Check dams constructed in braided rivers in the Flysch Sector of the Central Spanish Pyrenees were studied in order to assess the main geomorphic consequences upstream and downstream the dams. A sudden decrease of sediment transport downstream the check dams resulted in the development of an incised and confined channel with a meandering pattern, l...
Conference Paper
Twenty days after a forest fire, a short and intense rainstorm occurred in September, 1987, triggered a series of confined and unconfined debris flows in the headwater of the Najerilla River basin, Iberian Range, northern Spain. These debris flows occurred in a very stable mountain environment, with steep slopes typically covered by dense shrub com...
Article
Full-text available
Se presenta la localización de 173 glaciares rocosos relictos (atendiendo a su forma en planta: de lengua, lobulados y complejos) en seis zonas de la Cordillera Cantábrica, establecidas según factores de tipo morfoestructural y/ o concentración de glaciares rocosos relictos. Se analiza como determinados elementos como la litología, pendiente y orie...
Article
Full-text available
The location of 173 complex, lobate and tongue-shaped relict rock glaciers in the Cantabrian Mountains are presented. Six zones were established based on morphostructural characteristics and/or rock glacier concentration. We analyzed the importance of lithology, slope and aspect, with original relief conditions and rock outcrops characteristics (fr...
Article
Full-text available
For the first time in a sector of the Cantabrian Mountains, the Alto Sil, a detailed avalanche hazard cartography has been carried out. This cartography is based in field observations, inquiries to local people and the use of a Geographic Information System. In a first approach we define areas with suitable slopes, orientations, altitudes and veget...
Article
Full-text available
From 2003 to 2009 it has been tracked snowpatches in Alto Sil, in the Cantabrian Mountains. This work allowed us to locate 8 nivation hollows in this area. Currently 6 of them could be considered as active and 2 of them as inactive. A more detail study around Joyas del Nevadin and Valdeiglesia nivation hollows, allowed us to check the snow erosion...