Dobrogea Plateau

Hello and welcome for a new presentation of geography of Romania. Today we will talk about Dobrogea Plateau.

Of geological, rock components give the area the nickname Dobrogea mountains. It has a height of only 467 m on top of Greeks (Tutuiatul). Orogenesis that generated the Dobrogea mountains Hercynic (Devonian / Permian) in the north and Caledonian (Cambrian / Silurian) in the center. Height is generally low due to exogenous processes that have acted by eroding material constituent of rocks, exposing present atmospheric (surface) when rocks were forming at the base of the mountain chain (Greek borders). Of geographic range of heights in Dobruja Mountains are quartered make classification of geographically the plateau, which is situated between the Danube valley in the west and Black Sea in the north and east, is the only large extra-Carpathian unit, with aflorate oldest geological and morphological structures in Romania. On the surface, the oldest rocks are Proterozoic in Plateau Casimcei green schists, with over 600 million years old. The foundation of South Dobrogea there oldest rocks identified in wells and covered Paleozoic sedimentary layers present, Mesozoic and Neozoic that have a much higher age (1.6 billion years).

Dobrogea Plateau appears as a relatively rigid plateau formed on ancient rocks (shale green borders) and Mesozoic sedimentary deposits Neozoic strongly eroded by the action of exogenous long, with a mild relief, slightly wavy and relatively low altitude (200 -300m). The northern part is higher, sometimes reaching to 350-400 m to 467 m but the highest peak (peak Greeks Macin Mountains). The south is under 200m (maximum altitude is 204 m in Plateau Deliorman). In terms of tectonic, Dobrogea Plateau belong to different Microplate: in the north, the Black Sea microplate located in a subduction process (along a Benioff plane) in the Curvature Carpathians and the Moesian microplate south (including the foundation of the Romanian Plain and Dobrogea South). There landforms associated influenced by petrography and structure: a relief "granitic" train debris and steep in Macin Mountains ancient eroded peneplain preserved on the surface of green shale, small karst forms on Jurassic limestones, waving large structural surfaces adapted Neozoic formations of South Dobrogea. There are also north (Macin Mountains, Hills Tulcea and Babadag), a set of forms of sedimentation (inselberguri, aprons erosion) and the substrate loess forms of settlement and sufoziune.

Dobrogea Plateau are the main subdivisions of the North Dobrogea Massif and South Dobrogea Plateau, separated by Harsova-Capu Midia line. North Dobrogea Massif is taller, with a varied relief and a general inclination from the Danube to the sea. Consists of Macin Mountains (also known as the Pricopan) Peak Niculitel Tulcea Hills (continue with porch Agighiol) Nalbant Depression, Babadag (stretched from the Danube to the Black Sea, with maximum altitude of 401m), Plateau Casimcei consisting of green shale (the maximum altitude 325m), continued Hamangia porch, Jurassic limestones intersected by a small river Casimcea generated complex karst (caves from the mouth of Dobrogea and "key" Dobrogea). Sometimes Casimcei Plateau is considered a separate major subdivision of Dobrogea, the same rank with the other two and called Central Dobrogea. South Dobrogea Plateau is lower (below 200m), is widely curly after Sarmatian limestone folds and tilts from the sea to the Danube. Have a strong endorheic valleys. South-west, with maximum altitudes of 204m, generically called "Deliorman" (continuing into Bulgaria). Subdivisions are high littoral zone, Medgidia Plateau (Valley of Carasu) Negru Voda and Plateau Plateau Oltina changed into.

Not too much, not too little. God bless you!