In Rocks and materials of the Pyrenees mountains range (2021), Almarcegui enquires about the quantity and varieties of materials that constitute the Pyrenees mountain range, which came to be between eighty to twenty million years ago when the Iberic peninsula crashed into continental Europe. Where do the Pyrenees start and end? What is the desired degree of detail precision? How do these numeric facts influence our perception of the landscape? The result of these queries is a list of the weight of the rocks that conform the mountain range, calculated with the help of IGME (the Spanish Geological and Mining Institute).
Not dissimilarly, the artist carried out a calculation of the amount of sand that lies beneath the Netherlands for her project Sand in the Netherlands, presented at Into Nature – Drenthe Biennial 2021, with the help of TNO (the National Dutch Geological Institute).