Trift-Formation
Zurück zu Aar-MassivDarstellung und Status
- Index
- hTr
- Farbe CMYK
- 40 / 20 / 40 / 0
- Farbe RGB
- R: 160 G: 180 B: 160
- Rang
- lithostratigraphische Formation
- Gebrauch
- Element ist in Gebrauch
- Status
- informeller Begriff
Nomenklatur
- Deutsch
- Trift-Formation
- Français
- Formation du Trift
- Italiano
- Formazione del Trift
- English
- Trift Formation
- Herkunft des Namens
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Triftgletscher (BE), Innertkirchen (Das Typusprofil liegt unterhalb der Triffthütte SAC)
- Historische Varianten
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Trift-Formation (Schenker 1986, Schenker & Abrecht 1987), Trift Formation (Berger et al. 2017)
- Nomenklatorische Bemerkungen
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Glacier du Trift, pont suspendu du Trift
Beschreibung
- Beschreibung
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Tonschiefer, Konglomerate und vulkanogene Abfolgen (Pyroklastite und Rhyolithe)
- Mächtigkeit
- Max. 140 m am Chilchlistock, ca. 100 m an der Trifthütte.
Alter
- Alter Top
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- Late Pennsylvanian
- Alter Basis
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- Late Pennsylvanian
Paläogeografie und Tektonik
- Paläogeografie
- Europäischer Kontinent
- Tektonische Einheit (bzw. Überbegriff)
Referenzen
- Neubearbeitung
-
(2017) :
Geological Map of the Aar Massif, Tavetsch and Gotthard Nappes. Geological Special Map 1:100'000, Explanatory Notes 129
p.46: The Trift Formation, outcropping in the Trift area, contains a fine- to coarse-grained clastic metasedimentary rocks (metaconglomerates) with volcanic and volcaniclastic intercalations (Fig.6, see also detailed lithostratigraphic descriptions given by SCHENKER & ABRECHT 1987 and OBERHÄNSLI et al.1988). SCHENKER & ABRECHT (1987) reported a metamorphic garnet-biotite parageneses in the more sandy parts of the formation. This indicates the influence of the thermal aureole of the intruding Variscan plutonic rocks since the much younger regional Alpine metamorphism did not reach temperatures high enough to form this parageneses. Despite the lack of outcropping intrusive contacts, it was assumed that also this formation has been buried at depths, which would be consistent with the intrusion depth estimated for plutonic rocks of the Haslital Group (p. 51 f.). The Trift Formation generally marks the southeastern border of the Ferden-Guttannen Zone (Guttannen Gneiss Complex, SCHENKER & ABRECHT 1987). Further to the southwest, two small and isolated occurrences of Late Carboniferous rocks north of the Hienderstock and south of the Agassizhorn are assigned to the Trift Formation due to their similar tectonic position at the southeastern border of the Guttannen Gneiss Complex.