An island arc origin for the Canyon Mountain ophiolite complex, eastern Oregon, U.S.A. Earth Planet. Sci. Lett. 53, 255-265.Gerlach DC,Ave Lallemant HG,Leeman WP.An island arc origin for the Canyon Mountain ophiolite complex, Eastern Oregon, US A. Earth and Planet . 1981...
Results of simple model calculations that integrate cumulate compositions from the Kohistan arc terrain are presented in order to develop a consistent petrogenetic model to explain the Kohistan island arc granitoids. The model allows a quantitative approximation of the possible relative roles of fractional...
Kunming region of southwestern YZP. All these aulacogens ended without any diastrophism. On the southern margin of SKP, there may have developed an island-arc system with the Qinling Group as the arc and the Kuanping Group as the back-arc basin. Both groups yield Mesoprotrozoic isotopic ...
The Paleocene Tarkhov and Eocene Baklan Formation are the lower and upper members, respectively, of a continuousisland-arc sequence at the Kamchatsky Mys Peninsula on the Pacific side of the Kamchatka Peninsula. We studied Paleocene tuffs at five localities and Eocene tuffs and basalts at nine ...
The morphology of the inferior margin of the acetabular area, viewed laterally or medially, forms a convex arc relatively similar to that seen in AR-63. In contrast, in lateral view, the superior outline of the acetabular area of LM2 differs from that of AR-63 with an "elevation" of ...
Backarc rifting centers are particularly interesting because of their analogous tectonic settings with the Japan arc of Miocene age where many Kuroko-type volcanic massive sulfide deposits (VMSDs) formed in association with bimodal volcanisms... JI Ishibashi,T Urabe - Springer US 被引量: 189发表:...
(~ 120 m deep) part of the Late Hesperian northern ocean. Previous publications support the validity of this choice of sea level. For example, Rodriguez, et al.6found that the − 3800 m elevation forms the lowest extents of the oldest megatsunami lobes and superposed backwash channels. ...
(4) The rhyolite source rocks were metamorphosed supracrustal rocks comprising metamorphosed mafic volcanic and terrigenous clastic rocks of the Xinghua Ferry Group, which forms the basement of the Xingan Block. (5) The high Nb–Ta rhyolite was formed in a tectonic setting which developed after th...
8.5–8.7). Tectonic instability prevents the extensive progradation of clinoforms, due to the frequent collapse of unstable slopes, and promotes the development of ramps (Figs. 7.15 and 8.1). Shelf-slope systems may still form, but typically with narrow shelves, as in the case of forearc ...
1. As Breder stated, the suffix “-form” (e.g., in anguilliform) refers to the types of movement and not to the body forms, and is therefore not strictly parallel to words such as “fusiform.” Indeed, one fish may show more than one mode of swimming, as in the surfperch Cyma...