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Description
Modernist house built in 1905 in the upper part of Park Güell and near the Can Mora road. Modernist architects liked using local stones to build houses and walls. In this house, the ocher-colored limestones of the Devonias rose from the quarries near the Rovira hill were used.

The eye of the geologist
The geologist when there are buildings made of blocks of rock (ashlars) interprets that in the vicinity the source source of these rocks must be found, especially if the buildings have a certain age. This allows you to get an idea of ​​the geology of the surrounding area.

The limestone can easily be recognized thanks to its light color, its moderate hardness (3 on the Mohs scale) and to react with effervescence in the presence of hydrochloric acid.

History and interpretation
These sedimentary rocks are formed essentially by calcium carbonate (CaCO ₃ ) and their fossil content allows them to date between 420 - 360 Ma and indicates that they were formed in a marine environment.

The nodular aspect of these limestones is known by geologists like Faciques Griotte. Griotte limestone has ocher hues, with reddish levels due to the presence of hematites. The nodular aspect is the result of the processes of compaction and foundation of the sediment around fossil remains (goniatites). This facies owes its name to the similarity with the color of cherries Cherry, from Ukraine. It is characteristic of the Devonian of western Europe and is abundant in the Pyrenees and the Catalan Coastal Chain.

Interest
The limestone is a building material that is highly appreciated for its uniform texture, its clear color, the size of the microscopic crystals and the ease of breaking through plans that make it easy to operate.

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