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Ice and water in the Riera Major river, today, in Sant Sadurní d'Osormort, Osona region, which we can see in this series of photographs in Las Fotos de los Lectores de La Vanguardia.
The Riera Major originates in Montseny, within the municipality of Viladrau, crossing the Guilleries via Sant Sadurní d'Osormort and Vilanova de Sau, where it flows downstream into the Sau swamp, after traveling 133 kilometers.
On these cold days, a portion of the water freezes, given the little movement and the lower than normal flow rate due to the drought, forming these ephemeral natural sculptures.
One of the curiosities of the Riera Major as it passes through Sant Sadurní d'Osormort is that you can see a fish ladder. It is a type of transfer system, a channel with artificially increased roughness, which communicates the level of the reservoir upstream of the dam with the level of the river downstream of it.
Every stalactite begins to be created with a simple drop of mineralized water. When the drop falls, it leaves behind a fine trail of calcite. Each successive drop that forms and falls deposits another small layer of calcite.
