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Serpentinites from Cabo Ortegal (Galicia, Spain): a search for correct use as ornamental stones

By
Dolores Pereira
Dolores Pereira
1
Department of Geology
,
Universidad de Salamanca
,
37008 Salamanca
,
Spain
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Mercedes Peinado
Mercedes Peinado
1
Department of Geology
,
Universidad de Salamanca
,
37008 Salamanca
,
Spain
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Mariano Yenes
Mariano Yenes
1
Department of Geology
,
Universidad de Salamanca
,
37008 Salamanca
,
Spain
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Serafin Monterrubio
Serafin Monterrubio
1
Department of Geology
,
Universidad de Salamanca
,
37008 Salamanca
,
Spain
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Jose Nespereira
Jose Nespereira
2
Investigación y Control de Calidad
,
S.A., Parque Tecnológico de Boecillo R-102, Valladolid
,
Spain
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Jose Antonio Blanco
Jose Antonio Blanco
1
Department of Geology
,
Universidad de Salamanca
,
37008 Salamanca
,
Spain
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Published:
January 01, 2010

Abstract

Different varieties of serpentinites present at Cabo Ortegal were studied. For many years, the ‘Verde Pirineos’ type has been quarried and sold commercially, but its physical characteristics do not fulfil the requirements for its use as an ornamental stone. ‘Piedra de Doelo’ is the local name for a serpentinite that has been quarried and used for many centuries in a large number of historical buildings distributed throughout the area. The preservation status of the rock is very poor and the stone is severely affected by weathering. A third variety, similar to the ‘ophicalcite’ described in the literature, is currently under investigation with a view to studying the possibility of the resumption of serpentinite quarrying. Although serpentinites are commercially known as ‘green marbles’, Galician serpentinites do not fulfil the mineral requirements to be described as such. Study of the characteristics of serpentinites, including their mineralogy, may offer a clue to the correct use of Galician serpentinites.

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Contents

Geological Society, London, Special Publications

Natural Stone Resources for Historical Monuments

R Přikryl
R Přikryl
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Á Török
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Geological Society of London
Volume
333
ISBN electronic:
9781862395817
Publication date:
January 01, 2010

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