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Kanalkombination ist fĂŒr die
Kartierung der OberflĂ€chengeologie geeignet. Der Ugab River durchquert hier den Ausbiss einer geologischen Einheit, die âZerrissene Turbidite Systemâ genannt wird. Sie ist aus gefalteten, niedriggradig metamorphen neoproterozoischen Sedimentgesteinen aufgebaut, die in 5 Formationen untergliedert werden kann. Die meisten dieser Formationen können recht gut in der Falschfarbenaufnahme identifiziert werden: Die ZebrapĂŒts-Formation (grĂ€ulich bis gelblich), die Brandberg-West-Formation (ein dĂŒnnes violettes Band, zu geringmĂ€chtig, um im Westen des Gebietes deutlich erkennbar zu sein, aber anscheinend mit gröĂerer AusbissflĂ€che im Osten aufgrund sehr enger Faltung), die Brak-River-Formation (gelb- bis dunkelbraun), die Gemsbok-River-Formation (die etwas breiteren violetten BĂ€nder) und die Amis-River-Formation (orange bis rötlich-braun). Die gelblichen, brĂ€unlichen und rötlichen Farbtöne zeigen siliziklastische Gesteine an (Tonsteine und Sandsteine, einschlieĂlich âGrauwackeâ), wĂ€hrend Violett Karbonatgesteine anzeigt.
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surficial geology. The Ugab River here crosses the outcrop of a geological unit which is called âZerrissene
Turbidite Systemâ. It is made up of folded, low grade metamorphosed Neoproterozoic sedimentary rocks which can be subdivided into 5 formations. Most of these formations are quite good identifiable in the false color image: The ZebrapĂŒts Formation (greyish to yellowish), the Brandberg West Formation (a thin violet band, too thin to be clearly visible in the western part of the area, but apparently with larger outcrop area in the east due to very narrow folding), the Brak River Formation (yellowish to dark brown), the Gemsbok River Formation (the broader violet bands), and the Amis River Formation (orange to reddish-brown). The yellowish, brownish and reddish colors are indicative of siliciclastic rocks (claystones and sandstones, incl. âgreywackeâ) while violet is indicative of carbonates.
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This contrast-enhanced false color image has the
Landsat band combination 7-5-4, which means that the red (3), green (2), and blue (1) bands that comprise true color images are replaced by two mid-infrared (7 and 5) and one near-infrared (4) bands. This band combination is appropriate for mapping the
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Diese kontrastverstÀrkte
Falschfarbenaufnahme besitzt die Landsat-Kanalkombination 7-5-4, was bedeutet, dass der Rot- (3), GrĂŒn- (2) und Blaukanal (1), aus denen Echtfarbenbilder zusammengesetzt sind, durch zwei mittlere Infrarot- (7 und 5) und einen Nah-Infrarotkanal (4) ersetzt wurden. Diese
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False color satellite image of a part of the Ugab River valley, Namibia. â The Ugab river is an ephemeral river that only flows above the surface of its sandy bed a few days each year, but its subterranean water is an important resource for species in the
Damaraland region of northern Namibia,
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Falschfarben-Satellitenaufnahme eines Teils des Tals des Ugab River, Namibia. â Der Ugab ist ein periodisch wasserfĂŒhrender Fluss, der nur ein paar Tage im Jahr an der OberflĂ€che seines sandigen Bettes flieĂt, jedoch ist sein unterirdisches Wasser eine bedeutende
Ressource fĂŒr die Arten im
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Sedimentology of the Zerrissene Turbidite System, Damara Orogen, Namibia.
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