Pliensbachian


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Pliensbachian

[plēnz′bäk·ē·ən]
(geology)
A European stage of geologic time: Lower Jurassic (above Sinemurian, below Toarcian).
References in periodicals archive ?
For this purpose, the Upper Sinemurian, Pliensbachian and Lower Toarcian (Lower Jurassic) deposits of the Asturian Basin in northern Spain, including more than 100 m thick succession containing organic-rich and black shale deposits, have been studied.
This formation is one of two comprising the Laberge group of rocks, which are a northwest-trending linear belt of Early Sinemurian to Late Pliensbachian muddy turbidites, graywackes and conglomerates (Johannson, 1993).
2015): Palaeobiogeographical affinity of the early Pliensbachian (Early Jurassic) brachiopod assemblage of the Northern Caucasus (Russia): A new evidence.
2012): High-resolution chemostratigraphic records from Lower Pliensbachian belemnites: Palaeoclimatic perturbations, organic facies and water mass exchange (Asturian basin, northern Spain).
The Es Raco Quartzitic Sandstone Member is early Pliensbachian in age and associated with sea level fall and progrodation of local deltas with the following transgressive facies within a platform environment (Alvaro et al.
2007): Lithostratigraphy, sequence stratigraphy and depositional setting of the Pliensbachian and Toarcian series in the Lusitanian Basin, Portugal.
The overlying Vale das Fontes Fm represents the return to a marly sedimentation, which characterizes almost the entire Pliensbachian (Jamesoni-Margaritatus Zone) of most of the Lusitanian Basin.
The transgressive peak of the Cycle LJ-2 (Gomez and Goy, 2005) has been dated northeast of the Montalban Fault as Lower Pliensbachian Jamesoni Zone on the basis of the ammonoids and brachiopods found in the deposits of the Almonacid de la Cuba Fm (Sequeiros et al 1978; Comas-Rengifo, 1985; Comas-Rengifo et al.
2) Field occurrences in the first 5 m of the sublithographic limestones from the basal Pliensbachian (beds 5a and lower part of 5b of Mouterde, 1955), at 30 m from the base of "Calcarios e margas de Peniche" Formation.
1996): The Pliensbachian (Early Jurassic) "anoxic event in Asturias, northern Spain: Santa Mera Member, Rodiles Formation.
Also anoxic sediments are recorded in some periods like the Pliensbachian / Toarcian in the deepest basin parts.