Malor-Member

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Representation and status

Color CMYK
(0%,8%,51%,4%)
Color RGB
R: 245 G: 225 B: 120
Rank
lithostratigraphic Member (Subformation)
Validity
Unit is in Use
Status
valid formal name

Nomenclature

Deutsch
Malor-Member
Français
Membre du Malor
Italiano
Membro del Malor
English
Malor Member
Origin of the Name

Malorrus = Ahornenrus (GL)

Historical Variants

Malorschichten (Frey 1965), Malor Member (Menkveld-Gfeller et al. 2016)

Description

Description

Das Malor-Member besteht aus plattigen Mergeln mit eingeschalteten, feinen Sandstein- und Glimmersandsteinlagen. In den Sandsteinen können lokal Graduierung und Parallellamination beobachtet werden. Die Matrix ist kalkig, kann aber lokal auch silifiziert sein. In den obersten Lagen des Members treten Fragmente von karbonatisierten Andesiten auf.

Thickness
Wenige Zentimeter bis 15-25 m (Frey 1965), 30-40 m (Menkveld-Gfeller et al. 2016).

Hierarchy and sequence

Units at roof
Upper boundary

Ahornen-Member

Lower boundary

Globigerinenschiefern = Stad-Formation

Age

Age at top
  • Priabonian
Age at base
  • Priabonian
Dating Method

Biostratigraphie: Grossforaminiferen

Geography

Geographical extent
Zentral- und Ostschweiz (Klausenpass bis Linthtal).
Type locality
  • Ahornenrus = Malorrus (GL)
    Site particularities
    • typische Fazies
    Site accessibility
    • Grat
    Coordinates
    • (2716150 / 1192700)
    Note
    • Frey 1965, Menkveld-Gfeller et al. 2016

Palaenography and tectonic

  • Paleogene of the Helvetics
Tectonic unit (resp. main category)
Kind of protolith
  • sedimentary
Metamorphism
non metamorphic

References

Definition
Menkveld-Gfeller Ursula, Kempf Oliver, Funk Hanspeter (2016) : Lithostratigraphic units of the Helvetic Palaeogene: review, new definition, new classification. Swiss J. Geosc. 109/2, 171-199

p.188: The Malor Member was described by Frey (1965; ‘‘Malor-Schichten’’) at its type locality Ahornenrus [today Malorrus] (2716.150/1192.700).

Lithology: The Malor Member emanates from the Stad Formation by inserting fine-grained sandstone- and micaceous sandstone layers. Also, sandy limestone beds repeatedly occur in alternation with slaty marlstone.

Gradation and parallel lamination can be seen locally in the sandstones. The matrix is calcareous but can also be siliceous locally (oily gloss). In the highest layers, scattered fragments of carbonated andesite occur. The entire thickness is approx. 30–40 m. Overyling strata: Ahornen Member; underlying strata: Stad Formation. Biostratigraphy: Priabonian, Larger foraminifera. Current geographical extent: Central and Eastern Switzerland: Klausenpass to Linth valley. Tectonic units: Central and Eastern Switzerland: Lower Helvetic.
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