Browsing by Publisher "Gebruder Borntraeger Verlagsbuchhandlung"

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    Morphogenesis of the basin of Pasinler (North-East Anatolia); [Zur Morphogenese des Beckens von Pasinler (Nordostanatolien)]
    (Gebruder Borntraeger Verlagsbuchhandlung, 2005) Dayan E.
    Intramontanous basins are evident in northeast Anatolia. The Erzurum basin-zone, which is named after the biggest city of the region called Erzurum, is a west-east running morphological depression line in the area of Çayirli-Aşkale-Erzurum-Pasinler and Horasan. The basin of Pasinler is divided from the Erzurum-basin only by a volcanic barrier (Deveboynu geçidi) east of Erzurum. It raises 2,050 m above sea level. The build-up of this area has been marked by distinct compressing tectonics since the Cenozoic. Seismic activity is mirroring these compressive forces that are a consequence of the collision of the northern and southern plates. This elongated intramontanous basin-zone with its straight-lined west-east direction shows the same strike like the older subsurface. It broke down inbetween the North-Anatolian ophiolite suite that has been rising since the upper Miocene. The sinking of the intramontanous basin of Pasinler had its beginning as early as the lower Pliocene. The eastern Erzurum basin, namely the basin of Pasinler, has a certain exceptional position between the intramontanous basins. This is due to the fact that limnic sedimentation is still evident in the higher Pliocene, while in contrast for nearly all other basins this is not the case. It even persisted during the Pleistocene. The erosion and outwash processes of the basin of Pasinler are marked by river terraces at least for the younger Pleistocene. The diverse climatic influences with partly different morphodynamics are always showing only modifying effects, This is also the case for the basin of Pasinler. The overall mostly important determining parameters for the formation of the basin are tectonics, rock sequences and lithology. This research is based on fieldwork and excavations in the basin of Pasinler. It was realized by a research project thankworthy supported by the Atatürk University of Erzurum. © 2005 Gebrüder Borntraeger, D-14129 Berlin · D-70176 Stuttgart.
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    Revision of the late Carnian - Early Norian conodonts from the Stefanion section (Argolis, Greece) and their palaeobiogeographic implications
    (Gebruder Borntraeger Verlagsbuchhandlung, 2007) Noyan Ö.F.; Kozur H.W.
    Late Tuvalian and early Norian conodonts from the Stefanion section (Argolis, Greece, northern Pindos shelf) were investigated and compared with Carnian conodonts from the Epidauros section (Argolis, inner Maliak fragment), and with late Tuvalian and early Norian conodonts from the Neotethys in the south and the Meliata-Hallstatt Ocean in the north. Three new species, Epigondolella rigoi KOZUR n. sp., E. stefanionensis NOYAN n. sp. and Metapolygnathus multinodosus NOYAN n. sp., are established. The long early Norian E. abneptis Zone is replaced in its lower part by the E. quadrata Zone of ORCHARD and in its upper part by the new E. rigoi Zone. The middle Carnian (Julian) Hallstatt Limestones of the Epidauros section have a Pindos-Huglu Ocean conodont fauna unlike Julian Hallstatt Limestones of the Meliata-Hallstatt and Küre oceans. This suggests that the Meliata-Hallstatt Ocean was not the continuation of the Maliak Ocean. In the late Tuvalian, Metapolygnathus multinodosus NOYAN n. sp. is common in the Stefanion section, as it is in the same stratigraphie interval of the Neotethys. In contrast, this species is absent in the northern Tethys region. This confirms the very close connection of the Pindos-Huǧlu Ocean with the Neotethys s. s. in postCordevolian time. Prior to the Julian, a faunistic barrier appears to have separated the Neotethys s. s. from the Pindos-Huglu Ocean. © 2007 E. Schwelzerbart'sche Verlagsbuchhandlung,.
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    Age stucture of young- and old-growth Quercus pyrenaica stand in Spain
    (Gebruder Borntraeger Verlagsbuchhandlung, 2007) Barbour M.G.; Sánchez-Mata D.; Rodriguez-Rojo P.; Barnhart S.; Ugurlu E.; Llamas F.; Loidi J.
    Our objective was to examine the age structure of successionally young and mature old-growth stands dominated by Quercus pyrenaica, widely distributed on silicious substrates at 400-1800 m elevation in the Iberian Peninsula, France, and Morocco. Many hectares of young forest are recovering from intensive grazing and wood cutting as a result of land abandonment during the past several decades. Eight early-successional undisturbed stands, one intermediate-aged stand, and four old-growth stands were sampled. Age was determined by coring a subset of trees of various diameters and applying a regression formula to the dbh of 1316 trees among all 13 stands, so that every diameter could be expressed in years of age. Linear regression formulas accounted for 69-81 % of all diameter-age variation. For young stands, almost 2/3 of all trees were 30-39 yr of age, a dip in regeneration characterized the most recent 30 yr, and the oldest tree encountered was 90 yr old. For old stands, more than half the trees were 56-125 yr of age, a dip in regeneration characterized the most recent 75 yr, and the oldest tree encountered was 358 yr old. Thus, both young and mature stands showed depressed regeneration for at least the past three decades, a phenomenon shared by ecologically related oaks in California, where such age structures are interpreted as evidence of long-term population imbalance and instability. © 2007 Gebrüder Borntraeger.