|Regional Level Types|
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Province de Tucumán, Argentine
Provinz Tucumán, Argentinien
Provincia di Tucumán, Argentina
Provincia de Tucumán, Argentina
Provincia de Tucumán
Tukuman jisk'a suyu
Provincia de Tucumán
استان توکومان, آرژانتین
Tucumánin maakunta, Argentiina
Provinsi Tucumán, Argentina
Tukumanas province, Argentīna
Tukumano provincija, Argentina
Província de Tucumán
Provincia Tucumán, Argentina
Mkoa wa Tucumán, Argentina
Lalawigan ng Tucumán, Arhentina
Tajik (Cyrillic Script):
Located in the northwest of the country, Tucumán is the most densely populated, and the second-smallest by land area, of the provinces of Argentina. The capital is San Miguel de Tucumán, often shortened to Tucumán.
Neighbouring provinces are, clockwise from the north: Salta, Santiago del Estero and Catamarca. It is nicknamed El Jardín de la República (The Garden of the Republic), as it is a highly productive agricultural area.
Geological features and history:
The province of Tucumán has approximately 22,524 km² and has the most varied morphological characteristics: high mountains which are partly sterile, but generally covered with vegetation, with numerous streams, extensive plains, small desert areas, everything crossed by a dense drainage network of rivers.
Petrographically its mountain ranges are formed by deposits of various types and geological age.
The core of its mountains consists of older deposits of Precambrian age, composed of so-called metamorphic rocks, i.e. rocks which have undergone transformation processes by the action of physical and chemical agents. These ancient metamorphic rocks, forming the so-called "crystalline basement" and are especially slate, phyllitic shale, mica-bearing quartz, etc... in part migmatized and with intrusions of igneous rocks.
On this complex of ancient rocks were deposited more modern sediments, possibly of Mesozoic age. These Mesozoic deposits would be formed by conglomerates and consolidation of reddish sandstones, ancient rocks, partly calcareous Marl, i.e. a series of deposits still not completely well chronologically identified.
Then, in the Tertiary, sediments of fluvial origin, generally reddish sandstones, conglomerates, also volcanic tufaceous deposits, are deposited after having largely been eroded along with the more modern ones; composed of sediments of smaller grain size, mud, sand, loess and gravel deposits, and medium-sized sands, especially in terraces, usually form the surface of the flat areas of the province.
In the Precambrian or in the early stages of the Earth's history, silty, clay, charcoal and fine sands sediments were deposited, as a result of a process of sedimentation at the bottom of the sea, which at that time covered much of the surface of Tucumán.
When the sea disappeared by the rising land, materials gradually consolidated and later were affected by metamorphism, which transformed these sediments into the metamorphic rocks that we see today. As a result of this metamorphism and movements affecting the Earth's crust, cracks and planes of separation where subsequently ascended into the granitic magma (material in a state of fusion from the interior of the Earth) which cooled and crystallized to form the granite-like bodies of e.g. "San Ignacio", "Potrerillos", "Balcosna", etc...
After these events, the region suffered orogenic processes, i.e. suffered an uprising and the weathering agents acted on this formation, until the invasion of a sea possibly of Mesozoic age which deposited marine sediments, continuing until the mid-Tertiary. Volcanic activity followed and, as a result, the accumulation of materials and formation of deposits of ash, tuffs, gaps and eruptive rocks observable in many parts.
Later the basement was uplifted and erosion motivated the deposition of conglomeratic sediment.
In the Quaternary era, the first glacial demonstrations appear at summits as a result of the drop in temperature.
After glaciation, the climate improves and the temperature climbs, producing the effects of glacial erosion forming glacial deposits, subsequently dragging those deposits down to the foothills, where rainfall and minor rivers drag these sediments even further away from their original source.