York University Cave and Pothole Club

Explorations in the Picos de Europa

View over the Cares Gorge from Vega Huerta (Photo: Dave Milne)

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GeoContexts

Expedition Summaries
1984    1987    1990
1985    1988    1991
1986    1989    1994
1995-2006

Caves
Pozo de Cuetalbo (M2)
Pozo de Llastrale (β3)
Sima de Cotalbin (K903) Thesaurus Fragilis (M921)

Survey Galleries

Image Galleries

Humour
Camping in β3, 1990

Contacts
Caving Clubs
Caving in the Picos

References

Acknowledgements

Geology    Stratigraphy    Vega Huerta

Surface Geology of the Western Massif

The Western Massif has been mapped and four major Variscan thrust sheets (or nappes). Each is overthrust on to the one immediately to the south so that the dip of the thrusts generally increases from south to north. Vega Huerta is located on the first (most southerly) nappe to be emplaced which is called the Frontal Nappe Unit. The highest mountain in the massif, Pena Santa, is located at the front of the second nappe, the Pena Santa Nappe Unit. Within the Frontal Nappe Unit the dips of the beds is generally 0 to 20 although the dip reaches 30 at the southern escarpment and steeper dips occur near major faults. This contrasts with the area to the north and around Treviso where the dip is rarely less than 45.

Geology    Stratigraphy    Vega Huerta

Bibliography

Article from BCRA Cave Science Vol. 14 (YUCPC) Geology and speleogenesis of the M2 Cave System, Western Massif, Picos de Europa, Northern Spain, Kevin J Senior (YUCPC), Cave Science, 1987, 14, 3, 93-104, in English. PDF (5MB)
 

WebAuthor: D.Milne[at]Tesco.Net