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Geological Society, London, Special Publications
Author(s)
D. Pereira;
D. Pereira
University of Salamanca, Spain
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B. R. Marker;
S. Kramar;
S. Kramar
Slovenian National Building and Civil
Engineering Institute, Slovenia
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B. J. Cooper;
B. J. Cooper
University of South Australia, Australia
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B. E. Schouenborg
B. E. Schouenborg
Geological Survey of Sweden, Sweden
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Geological Society of London
Volume
407
Copyright:
Geological Society of London
© Geological Society of London 2015; ISBN 978-1-86239-695-1$30
ISBN electronic:
9781862396951
ISBN print:
9781862396852
Publication date:
January 01, 2015
This volume provides a synopsis of current research on volcanic processes, as gained through the use of palaeomagnetic and rock magnetic techniques. Thermoremanent magnetization information provides a powerful means of deciphering thermal processes in volcanic deposits, including estimating the emplacement temperature of pyroclastic deposits, which allows us to understand better the rates of cooling during eruption and transport. Anisotropy of magnetic susceptibility and anisotropy of remanence are used primarily to investigate rock fabrics and to quantify flow dynamics in dykes, lava flows, and pyroclastic deposits, as well as identify vent locations. Rock-magnetic characteristics allow correlation of volcanic deposits, but also provide means to date volcanic deposits and to understand better their cooling history. Because lava flows are typically good recorders of past magnetic fields, data from them allow understanding of changes in geomagnetic field directions and intensity, providing clues on the origin of Earth’s magnetic field.
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Author(s)
F. Fratini
F. Fratini
1
CNR – Institute for the Conservation and Valorisation of Cultural Heritage, via Madonna del Piano, 10 Sesto Fiorentino-Florence, Italy
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;
E. Pecchioni
E. Pecchioni
2
Earth Science Department–University of Florence, Via G. La Pira, 4 50121 Florence, Italy
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;
E. Cantisani
E. Cantisani
1
CNR – Institute for the Conservation and Valorisation of Cultural Heritage, via Madonna del Piano, 10 Sesto Fiorentino-Florence, Italy
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;
S. Rescic
S. Rescic
1
CNR – Institute for the Conservation and Valorisation of Cultural Heritage, via Madonna del Piano, 10 Sesto Fiorentino-Florence, Italy
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;
S. Vettori
S. Vettori
1
CNR – Institute for the Conservation and Valorisation of Cultural Heritage, via Madonna del Piano, 10 Sesto Fiorentino-Florence, Italy
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Published:
January 01, 2015
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Citation
F. Fratini, E. Pecchioni, E. Cantisani, S. Rescic, S. Vettori, 2015. "Pietra Serena: the stone of the Renaissance", Global Heritage Stone: Towards International Recognition of Building and Ornamental Stones, D. Pereira, B. R. Marker, S. Kramar, B. J. Cooper, B. E. Schouenborg
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Abstract
The most frequently used material in Florentine Renaissance architecture was Pietra Serena, a sandstone that nowadays is found in a quite satisfactory state of conservation. The reason for this is that architects and stone cutters in the past made careful selections of the materials they employed. This conscientious picking out was very important because most sandstone layers have a composition that is not always suitable for assuring an acceptable durability. This paper deals with the mineralogical, chemical, petrographical and physical characteristics of the Pietra Serena sandstone quarried in the hills near Florence in order to verify what was affirmed by Vasari (1568), Tuscan painter, architect and historian of art of the 16th century, and other Tuscan naturalists regarding the quality of this sandstone.
As a matter of fact, analyses demonstrate that the Pietra Serena sandstones quarried in the hills of Settignano (to the northeast of Florence) and in the Gonfolina area (Lastra a Signa, to the west of Florence), are composed of layers particularly rich in calcite present mainly as sparitic cement. This calcitic cement gives great durability to the stone as is demonstrated by the good state of conservation of some Florentine monuments realized with Pietra Serena.
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