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Silt is granular material of a size between sand and clay and composed mostly of broken grains of quartz. [1] Silt may occur as a soil (often mixed with sand or clay) or as sediment mixed in suspension with water. Silt usually has a floury feel when dry, and lacks plasticity when wet. Silt can also be felt by the tongue as granular when placed ...
Beech forests. A forest of European beech and European silver fir. Beech forests (Fagus sylvatica) are found in the mountain layer of the Iberian Eurosiberian region from 800 to 1500 metres up. The soil is cool, as often chalky as siliceous (rich in silica), and nearly always acidified by rain. The layer is characterised by the beech tree.
The La Plata basin is bounded by the Brazilian Highlands to the north, the Andes Mountains to the west, and Patagonia to the south. The watershed extends mostly northward from the source of the Río de la Plata for roughly 2,400 kilometres (1,500 mi), as far as Brasília and Cuiabá in Brazil and Sucre in Bolivia, spanning latitudes between 14 and 37 degrees south and longitudes between 43 and ...
Spanish has no official recognition in the Central American nation of Belize, a Commonwealth of Nations member state where English is the official national language. However, the country shares land borders with Spanish-speaking Mexico and Guatemala and, per the 2010 Belizean census, Spanish is spoken by a sizable portion of the population; 30% ...
The South Portuguese Zone now forms a thin triangle on the south end of Portugal. Only rocks from the Upper Devonian to Carboniferous are found in the south Portuguese Zone. The Late Devonian is represented by phyllite and quartzite beds with graded bedding. Volcanic rocks from Tournaisian and Lower Visean contain manganese, zinc and pyrite ores.
The World Reference Base for Soil Resources (WRB) is an international soil classification system for naming soils and creating legends for soil maps. The currently valid version is the fourth edition 2022. [1] It is edited by a working group of the International Union of Soil Sciences (IUSS). WRB, 4th edition (2022)
The Iberian Peninsula (IPA: / aɪ ˈ b ɪər i ə n /), [a] also known as Iberia, [b] is a peninsula in south-western Europe.Mostly separated from the rest of the European landmass by the Pyrenees, it includes the territories of Peninsular Spain [c] and Continental Portugal, comprising most of the region, as well as the tiny adjuncts of Andorra, Gibraltar, and, pursuant to the traditional ...
The very fertile soils from the erosion of the Andes formed the basis for the continent's only pre-Columbian state civilizations: those of the Inca Empire and its predecessors (Chavín, Nazca, Mochica, etc.). The area is still a major agricultural region. The Altiplano contains many rare minerals such as copper, tin, mercury ore.