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- Arenisca Uncastillo
Arenisca Uncastillo
Gold-shaded sandstone, which main characteristics are its beauty and its durability. This material is used for coatings as well as paving, even though its specifications and its workability make it highly suitable for restoring and decorating applications.
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Through the microscope, it is a sandstone, of fine grain (particles’ average diameter: 150 microns), in which the cement and part of its components are of calcitic composition. The texture is grain-supported and the stone lacks of matrix. The detrital particles correspond to a mainly angular (32.1%) quartz and stone fragments (50.6%; silexitic, quartzitic/limolitic, calcitic and dolomitic stones). The cement (8.2%) is calcitic and increases the carbonated particles in a epitaxial way (in crystalline continuity). The opaque and ferruginous particles, of doubtful detrital form (they could be diagenetic) constitute 7.9% of the stone. The muscovite, tourmaline and rutile act as mineral accessories. |
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Geographically, the Uncastillo rock quarry is located in the Uncastillo’s municipality, in the province of Saragossa.
Geologically, this material belongs to the Uncastillo formation which is the time of: Miocene inferior (Aquitaniense-Burdigaliense), (Puigdefábregas, 1975) equivalent to the Sariñena formation (Quirantes, 1978), located in the north of the Ebro’s Depression and in contact with the Outer Mountain ranges. The Uncastillo’s sanstone is a detrital sedimentary rock formed by the accumulation of fluvial currents’ depositions. This form of accumulation of the sediment allows layers that can be parallel or intercrossed, with certain variability in the grain size and the composition based on the river energy, to form. Thanks to the compaction’s process of these sediments and cementation’s process by chemical precipitation in the interstices, the stone acquires its characteristics of hardness and cohesion.
The subhorizontal disposition of the Uncastillo’s sanstones layers allows OLNASA to do simple mechanical extraction, without the need of realizing great material's dismantling, which implies a low environmental and visual impact of the quarries.
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Natural stone types
Arenisca Uncastillo
