Earth:Toundoute Continental Series
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Toundoute Continental Series Stratigraphic range: Pliensbachian–Toarcian | |
---|---|
Type | Geological formation |
Sub-units | D to H (see below) |
Underlies | Unseen, alluvium |
Overlies | Early Jurassic dolomite |
Area | Ouarzazate Province |
Thickness | Undetermined |
Lithology | |
Primary | Clay, sandstone, conglomerate |
Other | Gypsum, marl |
Location | |
Coordinates | [ ⚑ ] : 31°18′N 6°36′W / 31.3°N 6.6°W |
Paleocoordinates | [ ⚑ ] 26°36′N 3°24′W / 26.6°N 3.4°W |
Region | Ouarzazate Province |
Country | Morocco |
Extent | High Atlas |
Type section | |
Named for | Toundoute |
Named by | Montenat et al. |
Location | Toundoute |
Year defined | 2005 |
Thickness at type section | ~340 m (1,120 ft) |
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]
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
- ↑ 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.