Buechbrunnen-Schotter

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Representation and status

Index
-
CMYK Color
-
RGB color
R: 190 G: 215 B: 180
Rank
lithostratigraphic Formation
Validity
Unit is in Use
Status
informal term
SCS note
-
SCS date
-
Comment
-

Nomenclature

German
Buechbrunnen-Schotter
French
Gravier de Buechbrunnen
Italian
Ghiaia di Buechbrunnen
English
Buechbrunnen Gravel
Origin of the Name

Hardau (SH), Schaffhausen

Historical Variants
Obere Klettgauschotter (Graf & Hofmann 2000), Buechbrunnen-Schotter (Graf 2009 S.67)
Nomenclatorial Remarks
-

Synonyms

Synonyms
Non-synonyms
Possible confusion

Description

Description
-
Geomorphology
-
Thickness
ca. 10 m

Components

Lithological content
  • gravel : grains > 2 mm (visible to the naked eye ; rock = rudite: conglomerate or breccia)
Mineral content
-
Fossil content
-

Hierarchy and succession

Superordinate unit
Subordinate units
Units at roof
    -
Units at floor
Lateral equivalents
Upper boundary
-
Lower boundary
-
Stratigraphic discussion
-

Age

Age at top
Middle Pleistocene
Note about top
-
Age at base
Middle Pleistocene
Note about base
-
Dating method
-

Geography

Geographical extent
-
Type area
Type locality
-
Type profile
-
Reference profiles
-
Point of interest
-

Paleogeography and tectonic

Paleogeography
-
Kind of protolith
  • sedimentary
Conditions of formation
Glazifluviatile Ablagerung.
Sequence
-
Tectonic Unit (resp. main category)
Hochterrasse
Metamorphism
non metamorphic
Metamorphic facies
-
Note on metamorphism
-

References

Definition
Graf Hansruedi (2009): Stratigraphie von Mittel- und Spätpleistozän in der Nordschweiz. , Beitr. Geol. Karte Schweiz (N.F.) 168, 198 S.

S.67: Bei dessen Rückzug wurden die eben abgelagerten Sedimente zum Teil erodiert, und im Oberklettgau entstand der ca. 10 m mächtige Buechbrunnen-Schotter («Obere Klettgauschotter» nach GRAF & HOFMANN 2000), mit den charakteristischen Blockhorizonten, die in der Kiesgrube der GU AG (Fig. 17) im Gebiet Buechbrunnen besonders deutlich ausgebildet sind.
Revision
Preusser Frank, Graf Hans Rudolf, Keller Oskar, Krayss Edgar, Schlüchter Christian (2011): Quaternary glaciation history of northern Switzerland. , E&G Quaternary Science Journal 60/2-3, 282-305

The following phase of sedimentation (Beringen Glacial) is characterised by the direct presence of glaciers in Oberklettgau. The presence of the two branches of Rhine glacier (Lake Constance, Walensee) in the region is evidenced by petrography of the gravel. The ice reached towards the present village of Löhningen and left tills in the marginal areas of Oberklettgau, fluvial sand and gravel down-valley, and fine-grained sediments in smaller side valleys (‘Buechbrunnen-Schotter’ and ‘Benzen-Formation’; Fig. 10). Sedimentary evidence reveals that the glaciation comprises two advances separated by a phase of ice retreat. First results of IRSL dating imply an age of ca. 150 ka for the first ice advance towards the Klettgau (Preusser & Graf 2002; Graf 2009a).
Important publications
  • Lowick Sally E., Buechi Marius W., Gaar Dorian, Graf Hans R., Preusser Frank (2015): Luminescence dating of Middle Pleistocene proglacial deposits from northern Switzerland: methodological aspects and stratigraphical conclusions. , Boreas
  • (2000): Zur Eiszeitgeologie des oberen Klettgau (Kanton Schaffhausen, Schweiz).
  • Graf Hansruedi (2009): Stratigraphie von Mittel- und Spätpleistozän in der Nordschweiz. , Beitr. Geol. Karte Schweiz (N.F.) 168, 198 S.

Material and varia

Applications
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