Early–Middle Triassic fluvial ecosystems of Mallorca (Balearic Islands): Biotic communities and environmental evolution in the equatorial western peri-Tethys

2021 ◽  
pp. 103783
Author(s):  
Rafel Matamales-Andreu ◽  
Enrique Peñalver ◽  
Eudald Mujal ◽  
Oriol Oms ◽  
Frank Scholze ◽  
...  
Keyword(s):  
Middle Triassic ◽  
Balearic Islands ◽  
Environmental Evolution ◽  
Fluvial Ecosystems ◽  
Early Middle Triassic

scholarly journals Integrated bio- and cyclostratigraphy of Middle Triassic (Anisian) ramp deposits, NW Bulgaria

2019 ◽  
Vol 70 (4) ◽  
pp. 325-354 ◽  
Author(s):  
George Ajdanlijsky ◽  
André Strasser ◽  
Annette E. Götz
Keyword(s):  
Middle Triassic ◽  
Time Frame ◽  
Small Scale ◽  
Lateral Migration ◽  
Sea Level Changes ◽  
Orbital Cycles ◽  
Sequence Boundaries ◽  
Bounding Surfaces ◽  
Early Middle Triassic ◽  
Major Sequence

Abstract A cyclostratigraphic interpretation of peritidal to shallow-marine ramp deposits of the early Middle Triassic (Anisian) Opletnya Member exposed in outcrops along the Iskar River gorge, NW Bulgaria, is presented. Based on facies trends and bounding surfaces, depositional sequences of several orders can be identified. New biostratigraphic data provide a time frame of the studied succession with placement of the boundaries of the Anisian substages and show that the Aegean (early Anisian) substage lasted about 1.6 Myr. In the corresponding interval in the two studied sections, 80 elementary sequences are counted. Five elementary sequences compose a small-scale sequence. The prominent cyclic pattern of the Opletnya Member can thus be interpreted in terms of Milankovitch cyclicity: elementary sequences represent the precession (20-kyr) cycle and small-scale sequences the short eccentricity (100-kyr) cycle in the Milankovitch frequency band. Medium-scale sequences are defined based on lithology but only in two cases can be attributed to the long eccentricity cycle of 405 kyr. The transgressive-regressive facies trends within the sequences of all scales imply that they were controlled by sea-level changes, and that these were in tune with the climate changes induced by the orbital cycles. However, the complexity of facies and sedimentary structures seen in the Opletnya Member also implies that additional factors such as lateral migration of sediment bodies across the ramp were active. In addition, three major sequence boundaries have been identified in the studied sections, which can be correlated with the boundaries Ol4, An1, and An2 of the Tethyan realm.

Late Permian to Middle Triassic correlations and palaeogeographical reconstructions in south-western European basins: New sedimentological data from Minorca (Balearic Islands, Spain)

2009 ◽  
Vol 220 (1-2) ◽  
pp. 77-94 ◽  
Author(s):  
Bastien Linol ◽  
Antoine Bercovici ◽  
Sylvie Bourquin ◽  
José Bienvenido Diez ◽  
José López-Gómez ◽  
...  
Keyword(s):  
Middle Triassic ◽  
Balearic Islands ◽  
Late Permian ◽  
Western European

The oldest Diptera (Insecta) from the Upper Buntsandstein (early Middle Triassic) of Europe

Zootaxa ◽  
2021 ◽  
Vol 5067 (1) ◽  
pp. 135-143
Author(s):  
ELENA D. LUKASHEVICH
Keyword(s):  
Fossil Record ◽  
New Genus ◽  
Middle Triassic ◽  
Insect Fauna ◽  
The Family ◽  
Lower Franconia ◽  
Grès À Voltzia ◽  
Early Middle Triassic

The fossil record of Triassic Diptera is still poor, with the oldest dipteran assemblage described from the Upper Buntsandstein of the ‘Grès à Voltzia’ Formation (early Anisian, France). From the stratigraphically closest insect fauna of the Röt Formation of Lower Franconia, Germany, the first Diptera, Bashkonia franconica gen. et sp. nov. is described based on an isolated wing. The new genus is assigned to the family Nadipteridae, bridging the gap between two other genera included.  

Early-Middle Triassic Intrusions in Western Inner Mongolia, China: Implications for the Final Orogenic Evolution in Southwestern Xing-Meng Orogenic Belt

2019 ◽  
Vol 30 (5) ◽  
pp. 977-995 ◽  
Author(s):  
Min Liu ◽  
Shaocong Lai ◽  
Da Zhang ◽  
Renzhi Zhu ◽  
Jiangfeng Qin ◽  
...  
Keyword(s):  
Inner Mongolia ◽  
Middle Triassic ◽  
Orogenic Belt ◽  
Early Middle Triassic
Sign in / Sign up

Export Citation Format

Share Document