. Gesammelte reprints/Atlantic ozeanographische und meteorologische Laboratorien [und] Pacific ozeanographische Laboratories. Ozeanographie Zeitschriften.. ISL. 4n Bögen. (IHSh. RAI.. Tabi I I. Isi ein Bogen Fic;. 3. Querschnitt der Puerto Rico Graben (nach Ewingand Hee/en, 1955). Vertikale Überhöhung: 50 zu 1. äußere Kante, und es ist in der Regel ein Gebiet von robusten (aber relativ kleinen) unteren relief Features und eine komplexe crustal Struktur. Die insellage Hang der Insel arc ist auch durchsetzt mit Schluchten und scharfe, in der Regel kleine, topographische Vertiefungen und Erhebungen. Jedoch, wie Kontras

• Bildanbieter: The Book Worm / Alamy Stock Foto
• Bild-ID: REH2TF
• Dateigröße: 7,2 MB (152,7 KB Komprimierter Download)
• Freigaben (Releases): Model - nein | Eigentum - nein
• Format: 1744 x 1433 px | 29,5 x 24,3 cm | 11,6 x 9,6 inches | 150dpi

Weitere Informationen

Dieses Bild ist ein gemeinfreies Bild. Dies bedeutet, dass entweder das Urheberrecht dafür abgelaufen ist oder der Inhaber des Bildes auf sein Urheberrecht verzichtet hat. Alamy berechnet Ihnen eine Gebühr für den Zugriff auf die hochauflösende Kopie des Bildes.

Dieses Bild kann kleinere Mängel aufweisen, da es sich um ein historisches Bild oder ein Reportagebild handel

. Collected reprints / Atlantic Oceanographic and Meteorological Laboratories [and] Pacific Oceanographic Laboratories. Oceanography Periodicals.. ISL.4n ARCS. (iHSh.RAI.. Tabi I I. Isi An Arcs Fic;. 3. Cross section of the Puerto Rico Trench (after Ewingand Hee/en, 1955). Vertical exaggeration: 50 to 1. outer ridge, and it is generally an area of rugged (but relatively small-scale) bottom relief features and a complex crustal structure. The insular slope of the island arc is also riddled with canyons and sharp, usually small-scale, topographic depressions and elevations. However, as contrasted to the outer ridge, the insular slope frequently shows benches and ridges which can be followed parallel to the island arc sometimes for several hundred kilo- meters. Menard (W64)says:"'Almost everyone who sees an echogram of the side benches and bottom troughs of trenches believes that they are produced by normal faulting. That is, the benches are the upper surfaces of fault blocks which have moved down into the trenches and been rotated away from the trenches so they are excellent traps for sediment. Likewise, the troughs in the center can hardly be anything but grabens." Studies of the Aleutian Arc (Gibson and Nichols, 1953; Gates and Gibson, 1956) showed that several canyons, sharp depres- sions, and ridges are connected to known fault zones mapped on the islands. Location of volcanic necks, plugs and dikes were found to be con- nected to tensional faulting on several islands of the Aleutian Arc (Knappen. 1929; Coals, 1950). Well-developed double island arcs are less com- mon than the single arcs and consist of two generally parallel arcuate trends (Fig. 4). As recognized half a century ago by Brouwer. the inner arc consists of volcanic islands or when the islands themselves are not present, a drowned ridge or a /one of submarine volcanoes The volcanoes are characteristically sleep cones o' the explosive, andesitic type. On the outer, convex side of this andc

Stockbilder mithilfe von Tags suchen

• bookcentury1900
• booksponsorlyrasismemb
• b��chercollectionamericana