Earth:Toundoute Continental Series

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Toundoute Continental Series
Stratigraphic range: Pliensbachian–Toarcian
TypeGeological formation
Sub-unitsD to H (see below)
UnderliesUnseen, alluvium
OverliesEarly Jurassic dolomite
AreaOuarzazate Province
ThicknessUndetermined
Lithology
PrimaryClay, sandstone, conglomerate
OtherGypsum, marl
Location
Coordinates [ ⚑ ] : 31°18′N 6°36′W / 31.3°N 6.6°W / 31.3; -6.6
Paleocoordinates [ ⚑ ] 26°36′N 3°24′W / 26.6°N 3.4°W / 26.6; -3.4
RegionOuarzazate Province
Country Morocco
ExtentHigh Atlas
Type section
Named forToundoute
Named byMontenat et al.
LocationToundoute
Year defined2005
Thickness at type section~340 m (1,120 ft)
Toundoute Continental Series is located in Morocco
Toundoute Continental Series
Toundoute Continental Series (Morocco)

The Toundoute Continental Series is a geological unit in Morocco. It is a terrestrial deposit which overlies marine dolomites of equivalent age to the Lias Group of Europe. It is dated to the Pliensbachian to Toarcian stages of the Early Jurassic by equivalence in stratigraphy with the Azilal Formation and Wazzant Formation. The dinosaurs Tazoudasaurus and Berberosaurus are known from the unit.

Lithology

Stratigraphy

The lithology of the unit is divided into 5 units from D to H, (A-C represent the units of the underlying marine dolomite, with C representing a transition to terrestrial environment).[1]

Stratigraphy of the Toundoute Continental Series
Unit Lithology Thickness (metres) Dinosaur fossils
Alluvium Holocene conglomerate
H Clay-sandstone series ≥ 100
G Clay-sandstone series, with gypsum layer present at the top, just below this a second dinosaur bearing horizon is present with very similar lithology to unit F. 50 Tazoudasaurus, Berberosaurus
F Greenish grey clay-marl, detrital gravel to pebble sized clasts with lignite and bones. ≤ 5 Present, indeterminate
E Alternation of red brown clay, fine sandstone and sandstone coarse conglomerates 100
D Clay, fine sandstone and conglomerate, large volcanic rocks present 80

References

  1. Montenat, Christian; Monbaron, Michel; Allain, Ronan; Aquesbi, Najat; Dejax, Jean; Hernandez, Jean; Russell, Dale; Taquet, Philippe (August 2005). "Stratigraphie et paléoenvironnement des dépôts volcano-détritiques à dinosauriens du Jurassique inférieur de Toundoute (Province de Ouarzazate, Haut-Atlas – Maroc)" (in fr). Eclogae Geologicae Helvetiae 98 (2): 261–270. doi:10.1007/s00015-005-1161-x. ISSN 0012-9402.