Gypsum (CaSO4 2H2O) is a mineral belonging to the sulfate group, which is composed of Calcium (Ca2+), Sulfate Anion (SO42-) and Water (H2O), and is part of a very important group of rocks called Evaporites. It is one of the essential raw materials in our society today, used in buildings as plaster for interior facades … Continue reading Gypsum from Fuentes de Ebro
The name of the Tagus river here is truly that, a large cut in the limestone, "a giant cut" from the knife of water and tectonic forces. The gancheros who amazed José Luis Sampedro used to come down here from Peralejos to Aranjuez on a river that still resembles this one: "The upper Tagus is … Continue reading Tajo (still) wild
Basidiomycete fungi are an essential part of forests. Considered in the past as parasites or destroyers of plant remains, they have also gained the status of symbiotic organisms, very important for the growth and health of many plant species. Their cycle is closely related to the physical environment in which they develop, as well as … Continue reading Rebozuelos
In the Geographical-Statistical-Historical Dictionary of Spain and its Overseas Possessions by Pascual Madoz, written between 1845 and 1850, the Ucero River appears with the following description: UCERO: river in the province of Soria, judicial district of Burgo: it has its source in the term of the town of the same name, where it is joined … Continue reading Ucero river
Norway has over 25,000 km of coastline facing the North Atlantic Ocean and oriented almost entirely to the west. It is one of the countries where populations of Atlantic salmon are maintained in an optimal state of conservation, and recreational fishing is a significant leisure activity and attraction for fishermen worldwide. Its recent geological history … Continue reading Summer Salmons
"The history of a stream, even one that is born and lost in the moss, is the history of infinity." This is how Elisée Reclus begins his book "History of a Stream", published 150 years ago in 1869. A book written for ordinary, poorly educated people, for workers caught up in the urban chaos of … Continue reading Story of a stream
If we could witness the first graphic representation of a map, we would see that it was made with a stick on the sand. It's hard for anyone to argue against it. If we used our imagination and attended the scene, we would see several people listening to the explanations given by the author of … Continue reading Maps and intemperie
I grew up on the outskirts of a big city, in one of those towns now absorbed by urban growth, where you could still see some countryside around and shepherds with their sheep a few days a week. In spring, specifically in early May, the empty lots were filled with colors: yellows, purples, reds, and … Continue reading Open field flowers
Rain, water falling from the clouds onto the fields, onto the trees, onto the birds that fly and seek shelter, onto the cattle that continue to graze impassively in the meadow and stare at us as we pass by, onto our heads. Sometimes rain is fine, delicate, feminine, almost eternal. It is the rain of … Continue reading Rain
Among the objects in the Oxus Treasure at the British Museum in London, from the Achaemenid era of 550 BC - 330 BC, one that caught our attention was a golden bream that held perfumed oil. It was discovered in 1880 on the north bank of the Amu Darya River in Tajikistan. Later, it was … Continue reading Day of barbels in the stream
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