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Saar–Nahe Basin
Saar–Nahe Basin is a molasse basin in southwest Germany. The basin is located south of the Hunsrück mountains between the rivers Nahe and the Saar. The aggregation of sediments in the basin started in the late Carboniferous and Early Permian as part of the Variscan orogeny The Variscan or Hercynian orogeny was a geologic mountain-building event caused by Late Paleozoic continental collision between Euramerica (Laurussia) and Gondwana to form the supercontinent of Pangaea. Nomenclature The name ''Variscan'', comes f .... See also * Saar-Nahe Hills Further reading * * * * * * * * * * * * * * * {{DEFAULTSORT:Saar-Nahe Basin Structural geology Sedimentology Geology of Germany Basins of Europe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Molasse
__NOTOC__ The term "molasse" () refers to sandstones, shales and conglomerates that form as terrestrial or shallow marine deposits in front of rising mountain chains. The molasse deposits accumulate in a foreland basin, especially on top of flysch-like deposits, for example, those that left from the rising Alps, or erosion in the Himalaya. These deposits are typically the non-marine alluvial and fluvial sediments of lowlands, as compared to deep-water flysch sediments. Sedimentation stops when the orogeny stops, or when the mountains have eroded flat. Stanley, Steven M., ''Earth System History'', New York: W.H. Freeman and Company, 1999, p.243 The molasse can sometimes completely fill a foreland basin, creating a nearly flat depositional surface, that nonetheless remains a structural syncline. Molasse can be very thick near the mountain front, but usually thins out towards the interior of a craton; such massive, convex accumulations of sediment are known as ''clastic wedge I ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sedimentary Basin
Sedimentary basins are region-scale depressions of the Earth's crust where subsidence has occurred and a thick sequence of sediments have accumulated to form a large three-dimensional body of sedimentary rock. They form when long-term subsidence creates a regional depression that provides Accommodation (geology), accommodation space for accumulation of sediments. Over millions or tens or hundreds of millions of years the deposition of sediment, primarily gravity-driven transportation of water-borne eroded material, acts to fill the depression. As the sediments are buried, they are subject to increasing pressure and begin the processes of compaction (geology), compaction and lithification that transform them into sedimentary rock. Sedimentary basins are created by deformation of Earth's lithosphere in diverse geological settings, usually as a result of plate tectonics, plate tectonic activity. Mechanisms of crustal deformation that lead to subsidence and sedimentary basin formati ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hunsrück
The Hunsrück () is a long, triangular, pronounced upland in Rhineland-Palatinate, Germany. It is bounded by the valleys of the Moselle-Saar (north-to-west), the Nahe (south), and the Rhine (east). It is continued by the Taunus mountains, past the Rhine and by the Eifel past the Moselle. To the south of the Nahe is a lower, hilly country forming the near bulk of the Palatinate region and all of the, smaller, Saarland. Below its north-east corner is Koblenz. As the Hunsrück proceeds east it acquires north-south width and three notable gaps in its southern ridges. In this zone are multi-branch headwaters including the Simmerbach ending at Simmertal on the southern edge. This interior is therefore rarely higher than above sea level. Peaks and escarpments are principally: the (Black Forest) Hochwald, the Idar Forest, the Soonwald, and the Bingen Forest. The highest mountain is the Erbeskopf (816 m; 2,677 ft), towards the region's south-west. Notable towns are Simmern, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nahe (Rhine)
The Nahe () is a river in Rhineland-Palatinate and Saarland, Germany, a left tributary to the Rhine. It has also given name to the wine region Nahe (wine region), Nahe situated around it. The name Nahe is derived from the Latin word ''Nava'', which is supposed to be based upon the Celtic origin for ''the wild river''. The Nahe separates the northern part of the Palatinate (region), Palatinate from the Hunsrück. It rises in the area of Nohfelden (Saarland), flowing through Rhineland-Palatinate and joining the Rhine in Bingen am Rhein, Bingen. Its length is . Towns along the Nahe include Idar-Oberstein, Kirn, Bad Kreuznach and Bingen. Hydrology The drainage basin of the river covers an area of . Due to this relatively large area compared to the river's length high floods can occur along its middle and lower course within only a few hours, however flowing off also quickly. In 1993 and 1995 in Bad Kreuznach a flow of more than was measured and more than at its mouth into th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Saar (river)
The Saar (; french: Sarre ) is a river in northeastern France and western Germany, and a right tributary of the Moselle. It rises in the Vosges mountains on the border of Alsace and Lorraine and flows northwards into the Moselle near Trier. It has two headstreams (the ''Sarre Rouge'' and ''Sarre Blanche'', which join in Lorquin), that both start near Mont Donon, the highest peak of the northern Vosges. After (129 kilometres; 80 miles in France and on the French-German border, and 117 kilometres; 73 miles in Germany) the Saar flows into the Moselle at Konz (Rhineland-Palatinate) between Trier and the Luxembourg border. It has a catchment area of . The Saar flows through the following departments of France, states of Germany and towns: * Moselle (F): Abreschviller (Sarre Rouge), Lorquin, Sarrebourg, Fénétrange *Bas-Rhin (F): Sarre-Union * Moselle (F): Sarralbe, Sarreguemines *Saarland (D): Saarbrücken, Völklingen, Wadgassen, Bous, Saarlouis, Dillingen, Merz ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Carboniferous
The Carboniferous ( ) is a geologic period and system of the Paleozoic that spans 60 million years from the end of the Devonian Period million years ago ( Mya), to the beginning of the Permian Period, million years ago. The name ''Carboniferous'' means "coal-bearing", from the Latin '' carbō'' ("coal") and '' ferō'' ("bear, carry"), and refers to the many coal beds formed globally during that time. The first of the modern 'system' names, it was coined by geologists William Conybeare and William Phillips in 1822, based on a study of the British rock succession. The Carboniferous is often treated in North America as two geological periods, the earlier Mississippian and the later Pennsylvanian. Terrestrial animal life was well established by the Carboniferous Period. Tetrapods (four limbed vertebrates), which had originated from lobe-finned fish during the preceding Devonian, became pentadactylous in and diversified during the Carboniferous, including early amphibian line ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cisuralian
The Cisuralian is the first Series (stratigraphy), series/Epoch (geology), epoch of the Permian. The Cisuralian was preceded by the Pennsylvanian (geology), Pennsylvanian and followed by the Guadalupian. The Cisuralian Epoch is named after the western slopes of the Ural Mountains in Russia and Kazakhstan and dates between 298.9 ± 0.15 – 272.3 ± 0.5 Mya. The Cisuralian is often synonymous with the informal terms early Permian or lower Permian. It corresponds approximately with the Wolfcampian in southwestern North America. The series saw the appearance of beetles and Fly, flies and was a relatively stable warming period of about 21 million years. Name and background The Cisuralian is the first series or epoch of the Permian. The Cisuralian was preceded by the last Pennsylvanian epoch (Gzhelian) and is followed by the Permian Guadalupian Epoch. The name "Cisuralian" was proposed in 1982, and approved by the International Subcommission on Permian Stratigraphy in 1996. The Ci ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Variscan Orogeny
The Variscan or Hercynian orogeny was a geologic mountain-building event caused by Late Paleozoic continental collision between Euramerica (Laurussia) and Gondwana to form the supercontinent of Pangaea. Nomenclature The name ''Variscan'', comes from the Medieval Latin name for the district '' Variscia'', the home of a Germanic tribe, the Varisci; Eduard Suess, professor of geology at the University of Vienna, coined the term in 1880. (Variscite, a rare green mineral first discovered in the Vogtland district of Saxony in Germany, which is in the Variscan belt, has the same etymology.) ''Hercynian'', on the other hand, derives from the Hercynian Forest. Both words were descriptive terms of strike directions observed by geologists in the field, ''variscan'' for southwest to northeast, ''hercynian'' for northwest to southeast. The ''variscan'' direction reflected the direction of ancient fold belts cropping out throughout Germany and adjacent countries and the meaning shifted from d ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Saar-Nahe Hills
The Saar-Nahe Hills or Saar-Nahe Uplands (german: Saar-Nahe-Bergland or ''Saar-Nahe-Berg- und Hügelland'') is a major natural region (major landscape unit group, level 3) in the German states of Rhineland-Palatinate and the Saarland. The region of hills and mountains covers an area of 4,185 km²Emil Meynen, Josef Schmithüsen: ''Handbuch der naturräumlichen Gliederung Deutschlands.'' Bundesanstalt für Landeskunde, Remagen/Bad Godesberg 1953–1962 (9 Lieferungen in 8 Büchern, aktualisierte Karte 1:1.000.000 mit Haupteinheiten 1960). (including the Sobernheim Valley) running from Saarbrücken, Kaiserslautern and the Palatine Forest in the south to the Hunsrück in the northeast. It contains the catchment area of the Nahe (Rhine), Nahe as far as Bad Kreuznach as well as small sections of the Middle Saar (river), Saar in the west. Location and boundaries The Saar-Nahe Hills are located between the Hunsrück to the north-northwest, the Lower Naheland to the north, the Alzey H ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Structural Geology
Structural geology is the study of the three-dimensional distribution of rock units with respect to their deformational histories. The primary goal of structural geology is to use measurements of present-day rock geometries to uncover information about the history of deformation (strain) in the rocks, and ultimately, to understand the stress field that resulted in the observed strain and geometries. This understanding of the dynamics of the stress field can be linked to important events in the geologic past; a common goal is to understand the structural evolution of a particular area with respect to regionally widespread patterns of rock deformation (e.g., mountain building, rifting) due to plate tectonics. Use and importance The study of geologic structures has been of prime importance in economic geology, both petroleum geology and mining geology. Folded and faulted rock strata commonly form traps that accumulate and concentrate fluids such as petroleum and natural gas. Simil ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sedimentology
Sedimentology encompasses the study of modern sediments such as sand, silt, and clay, and the processes that result in their formation (erosion and weathering), transport, deposition and diagenesis. Sedimentologists apply their understanding of modern processes to interpret geologic history through observations of sedimentary rocks and sedimentary structures. Sedimentary rocks cover up to 75% of the Earth's surface, record much of the Earth's history, and harbor the fossil record. Sedimentology is closely linked to stratigraphy, the study of the physical and temporal relationships between rock layers or strata. The premise that the processes affecting the earth today are the same as in the past is the basis for determining how sedimentary features in the rock record were formed. By comparing similar features today to features in the rock record—for example, by comparing modern sand dunes to dunes preserved in ancient aeolian sandstones—geologists reconstruct past environmen ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Geology Of Germany
The geology of Germany is heavily influenced by several phases of orogeny in the Paleozoic and the Cenozoic, by sedimentation in shelf seas and epicontinental seas and on plains in the Permian and Mesozoic as well as by the Quaternary glaciations. Regional geological setting Germany is located between the geologically very old (Precambrian) East European Craton (Baltica) to the north and north-east (that further north is exposed as the Baltic Shield), and the geologically young (Cenozoic) Alpine-Carpathian Orogen to the south. The corresponding crustal provinces of Germany are thus geologically "middle-aged" and were accreted onto the East European Craton during the Paleozoic through plate tectonic processes. These areas form the geological basement of Germany. The basement is the oldest of the four geological crustal levels (''German: '') that overlap in Central Europe, north of the Alps. The levels mainly reflect the age relationships of rocks and the great tectonic trends ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
