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Sigillara specimen (bark removed), found in the Nordstern mine, Flöz Zollverein 2/3 at a depth of 1000m.. During the Carboniferous Period, in the Paleozoic era, which began 360 million years ago and ended 300 million years ago, layers of slate, coal and sandstone were formed. 400 to 300 million years ago, new mountains were uplifted during the Variscan mountain-building period.
[6] [7] [8] Quizlet's blog, written mostly by Andrew in the earlier days of the company, claims it had reached 50,000 registered users in 252 days online. [9] In the following two years, Quizlet reached its 1,000,000th registered user. [10] Until 2011, Quizlet shared staff and financial resources with the Collectors Weekly website. [11]
Rather, the Ruhr was "a symbol of German Power and a source of French humiliation". [3] As early as February 5, 1945, France's provisional head of government Charles de Gaulle broadcast a speech introducing the vision of a "Ruhr basin" ("Ruhrbecken") as free from a future German state or German states. At the conferences of the Allies, the ...
The 1911 edition of Encyclopædia Britannica has only one definition of "Ruhr": "a river of Germany, an important right-bank tributary of the lower Rhine". The use of the term "Ruhr" for the industrial region started in Britain only after World War I, when French and Belgian troops had occupied the Ruhr district and seized its prime industrial assets in lieu of unpaid reparations in 1923.
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There are five Ruhr reservoirs on the river, often used for leisure activities. Hengsteysee between Dortmund and Hagen, surface area: 1.36 km 2, height of the weir 4.5 m; Harkortsee between Herdecke and Wetter; surface area: 1.37 km 2, height of the weir 7.8 m; Kemnader See between Witten and Bochum; surface area: 1.25 km 2, height of the weir 2 m
The Ruhr Area, the industrial engine of West Germany, is shown in brown as it was to some extent under the control of the International Authority for the Ruhr. Pre-war German territory east of the Oder-Neisse line is shown in gray, because it was assigned to Poland or annexed by the Soviet Union.
According to the surveys of the Federal Forest Inventory, 48.0 percent of the German forest area is private forest, 29.0 percent state forest of the federal states, 19.4 percent corporate forest and 3.5 percent federal state forest. [9] The federal state with the largest private forest share is North Rhine-Westphalia with 66.8 percent. With 46. ...