Die subnivale Höhenstufe und ihre Untergrenze in den Bündner und Walliser Alpen

Furrer, G.

doi:10.5194/gh-20-185-1965

Cited by 9 publications

(3 citation statements)

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“…In the latter region, research on the distribution of solifluction landforms and the quantification of past and present solifluction rates has a long tradition (e.g. Furrer 1954 ; 1965 ; Gamper 1983 ; 1987 ; Matsuoka et al 1997 ; 2011 ; Krummenacher et al 1998 ). In the Austrian Alps farther to the east of the Swiss Alps, solifluction landform detection and process monitoring has been carried out by, for example, Höllermann ( 1967 ), Stingl ( 1969 ), Stocker ( 1973 ; 1984 ), and Höfner ( 1993 ).…”

Section: Introductionmentioning

confidence: 99%

Solifluction rates and environmental controls at local and regional scales in central Austria

Kellerer‐Pirklbauer

2017

Norsk Geografisk Tidsskrift - Norwegian Journal of Geography

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Solifluction is a widespread periglacial phenomenon. Little is known about present solifluction rates in Austria. The author monitored five solifluction lobes during a four-year period. Annual rates of surface velocity, vertical velocity profiles, depths of movement, and volumetric velocities were quantified using near-surface markers and painted lines. Environmental conditions were assessed using air temperature, soil texture, and ground temperature-derived parameters. The latter were used to estimate the relevance of needle-ice creep, diurnal frost creep, annual frost creep, and gelifluction. The mean surface velocity rates were 3.5–6.1 cm yr−1 (near-surface markers) and 6.2–8.9 cm yr−1 (painted lines), respectively, indicating a high relevance of needle-ice creep. The mean depth of movement was 32.5–40 cm. The mean volumetric velocities were 71–102 cm3 cm−1 yr−1. Solifluction rates at the five sites did not correlate with each other due to site-specific controls. No statistically significant correlations were quantified between solifluction rates and different environmental parameters due to data gaps and short time series, thus highlighting the importance of long-term monitoring. Nevertheless, the results suggest that longer zero curtain periods, longer seasonal ground thawing periods, later start of the seasonal snow cover, more freeze-thaw cycles, and cooler early summer temperatures promote solifluction.

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Section: Introductionmentioning

confidence: 99%

Solifluction rates and environmental controls at local and regional scales in central Austria

Kellerer‐Pirklbauer

2017

Norsk Geografisk Tidsskrift - Norwegian Journal of Geography

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“…The Ducan region near Davos in south-eastern Switzerland (Canton of Grisons) belongs to the Austroalpine Silvretta nappe and with the Prosanto Formation provides an important site for Middle Triassic vertebrate fossils (e.g., Bürgin et al, 1991 ; Furrer, 1995 ), which has been excavated systematically under supervision of one of us (HF) since 1996 (Furrer, 2009 ). The fossil record of the formation includes mainly actinopterygian fish and small marine reptiles, but also invertebrates and plant remains (an overview can be found in Furrer, 2019 ), with few land-living organisms being washed in from nearby islands during storms (Furrer, 2009 ). The organisms lived in an intraplatform basin, which was separated from the open ocean of the Palaeotethys and became embedded under relatively calm and probably anoxic conditions (Furrer, 1995 ; Fig.…”

Section: Geology Stratigraphy and Palaeontology Of The Prosanto Forma...mentioning

confidence: 99%

A new pachypleurosaur from the Early Ladinian Prosanto Formation in the Eastern Alps of Switzerland

et al. 2022

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The Alpine Prosanto Formation (Middle Triassic) cropping out in the Ducan region in eastern Switzerland has yielded a rich fish and reptile fauna. Here, we present new pachypleurosaur remains from the upper part of the formation (Early Ladinian), similar to the previously known pachypleurosaurs from the Middle Triassic UNESCO World Heritage Site of Monte San Giorgio in southern Switzerland/northern Italy. From these remains, a new pachypleurosaur species, Prosantosaurus scheffoldi nov. gen. et spec., is described on the basis of six fairly complete skeletons, one disarticulated specimen and an isolated skull. As is typical for pachypleurosaurs and most other Triassic marine reptiles, the new taxon is based to a large degree on a combination of characters (e.g., nasals articulating broadly with the anterior margins of the prefrontals and lacking posterior processes; postorbitals with rounded anterior processes that articulate with the postfrontals anterolaterally) rather than on many unambiguous autapomorphies, although a few of the latter were found including (1) a premaxilla which is excluded from entering both the external and internal nares and (2) a parietal, which is distinctly longer than wide and carrying distinct anterolaterally angled processes. Phylogenetic relationships of the new taxon are tested within European Pachypleurosauria, revealing that the new species is the sister taxon to a clade including Serpianosaurus, Proneusticosaurus, and the monophyletic Neusticosaurus spp. Mapping of palaeogeographic and stratigraphical distribution of valid European pachypleurosaurs shows that a formerly proposed scenario of migration of pachypleurosaurs from the eastern Palaeotethys during the Olenekian into the Germanic Basin and a subsequent diversification and invasion during the Anisian into the intraplatform basins of the South Alpine realm must be re-assessed. The exceptional preservation and preparation of the Ducan fossils further allow the description of tooth replacement patterns for the first time in a European pachypleurosaur species. The “alveolarization” of replacement teeth, the horizontal replacement pattern, and the subsequent remodelling of the functional alveoli during tooth replacement supports the monophyly of Sauropterygia as discussed before.

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“…Eingehende situmetrische Untersuchungen, z. B. an rezenten Struktur¬ bodenformen (Furrer, 1965und Elsaßer, 1966 (Bachmann, 1966 (Furrer, 1965(Furrer, und 1966Bachmann, 1966;Elsasser, 1966 (Furrer, 1965(Furrer, , 1966Bachmann, 1966;Elsasser, 1966 (Furrer, 1966 (Furrer, 1965). Wenn die Ergebnisse ins Dreieck übertragen werden, weisen «Zwischen¬ streifenwerte» eine bedeutend größere Streuung auf als «Streifenwerte» (Bachmann, 1966 (Bachmann, 1966 …”

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Die Situmetrie (Einregelungsmessung) als morphologische Untersuchungsmethode

Furrer¹,

Bachmann²

1968

Geogr. Helv.

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Die subnivale Höhenstufe und ihre Untergrenze in den Bündner und Walliser Alpen

Abstract: Einen wesentlichen Bestandteil der Hochgebirgslandschaft bildet neben der alpinen und der nivalen die subnivale Höhenstufe mit ihrem solifluidalen Formenkreis (Troll 1955). Nach A. Penck (1910)

Cited by 9 publications

References 1 publication

Solifluction rates and environmental controls at local and regional scales in central Austria

Solifluction rates and environmental controls at local and regional scales in central Austria

A new pachypleurosaur from the Early Ladinian Prosanto Formation in the Eastern Alps of Switzerland

Die Situmetrie (Einregelungsmessung) als morphologische Untersuchungsmethode

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