Dinoflagellate cyst superdominance assemblages from the Upper Cretaceous of the Santos Basin, offshore SE Brazil, and their palaeoecological significance

2017 ◽  
pp. 285-292 ◽  
Author(s):  
M. Arai ◽  
M. C. Viviers
Keyword(s):  
Upper Cretaceous ◽  
Dinoflagellate Cyst ◽  
Se Brazil

scholarly journals Organic-walled dinoflagellate cyst records from a prospective Turonian – Coniacian (Upper Cretaceous) GSSP, Słupia Nadbrzeżna, Poland

2016 ◽  
Vol 65 ◽  
pp. 17-24 ◽  
Author(s):  
Kate Olde ◽  
Ian Jarvis ◽  
Martin Pearce ◽  
Ireneusz Walaszczyk ◽  
Bruce Tocher
Keyword(s):  
Upper Cretaceous ◽  
Dinoflagellate Cyst

scholarly journals Provenance and weathering index of the Upper Cretaceous São Carlos Formation and its tectonic significance in the eastern Bauru Basin, SE Brazil

2019 ◽  
Vol 19 (3) ◽  
pp. 77-94
Author(s):  
Lara Ferreira Neves ◽  
Alessandro Batezelli
Keyword(s):  
Trace Elements ◽  
Chemical Weathering ◽  
Upper Cretaceous ◽  
Source Area ◽  
Sedimentary Basins ◽  
Major And Trace Elements ◽  
Published Data ◽  
Weathering Index ◽  
Se Brazil ◽  
Eastern Border

Geochemistry of major and trace elements has been used as an important tool for the study of provenance and tectonic and climatic evolution of sedimentary basins. The São Carlos Formation is an Upper Cretaceous unit that lies on the eastern border of the Bauru Basin. Despite the paleontological and paleodepositional studies performed in this unit in the last years, little is known about the correspondence between tectonic and climatic conditions acting during the first stages of sedimentation. The hypothesis of this paper is to evaluate São Carlos and Araçatuba formations and understand the evolution of the eastern border of the basin. Thus, were conducted geochemical studies using X-ray fluorescence on sandstones, siltstones, and shales from the São Carlos Formation. According to the chemical weathering index, which presented values ranging from 57.12 to 71.58%, the oxides of major elements indicate that moderate weathering processes affected the source area, possibly associated with the arid-semiarid climate. Alkaline rocks, granites, gneisses, and metasediments were the main lithotypes of the source area. Ternary diagrams show that the tectonic environment was equivalent to the passive continental margin, coinciding with the Serra do Mar and, secondarily, Alto Paranaíba Uplift regions. Based on major and trace elements, their ratios, and published data on the basin, was elaborated a paleogeographic model of the eastern border of the Bauru Basin, concluding that the source area of the sediments was constituted by intermediate and felsic rocks, sometimes recycled by sedimentary processes.

Dinoflagellate cyst biostratigraphy of the Coniacian–Santonian (Upper Cretaceous): New data from the English Chalk

2008 ◽  
Vol 150 (1-4) ◽  
pp. 59-96 ◽  
Author(s):  
Iain M. Prince ◽  
Ian Jarvis ◽  
Martin A. Pearce ◽  
Bruce A. Tocher
Keyword(s):  
Upper Cretaceous ◽  
Dinoflagellate Cyst

scholarly journals Upper Cretaceous dinoflagellate cyst stratigraphy, onshore West Greenland

1996 ◽  
Vol 170 ◽  
pp. 1-104
Author(s):  
H Nøhr-Hansen
Keyword(s):  
Upper Cretaceous ◽  
Geological Survey ◽  
West Greenland ◽  
Dinoflagellate Cyst ◽  
Sequence Stratigraphic ◽  
Stratigraphic Analysis

This study is part of the Geological Survey of Greenland (GGU) project 'Sequence stratigraphic analysis of the Cretaceous sediments in West Greenland', and aims to establish a palynostratigraphy for the Disko-Nuussuaq- Svartenhuk Halvø area in West Greenland.

scholarly journals A Cretaceous dinoflagellate cyst zonation for NE Greenland

2019 ◽  
Vol 157 (10) ◽  
pp. 1658-1692 ◽  
Author(s):  
H. Nøhr-Hansen ◽  
S. Piasecki ◽  
P. Alsen
Keyword(s):  
North Sea ◽  
Lower Cretaceous ◽  
Upper Cretaceous ◽  
Barents Sea ◽  
The South ◽  
Norwegian Sea ◽  
Dinoflagellate Cyst ◽  
The North ◽  
Northern North Sea ◽  
First Time

AbstractA palynostratigraphic zonation is for the first time established for the entire Cretaceous succession in NE Greenland from Traill Ø in the south to Store Koldewey in the north (72–76.5° N). The zonation is based on samples from three cores and more than 100 outcrop sections. The zonation is calibrated to an updated ammonite zonation from the area and to palynozonations from the northern North Sea, Norwegian Sea and Barents Sea areas. The palynozonation is primarily based on dinoflagellate cyst and accessory pollen. The Cretaceous succession is divided into 15 palynozones: seven Lower Cretaceous zones and eight Upper Cretaceous zones. The two lowermost zones are new. The following five (Lower Cretaceous) zones have already been described. Two of the Upper Cretaceous zones are new. The zones have been subdivided into 20 subzones, 11 of which have been described previously and one of which has been revised/redefined. Nine subzones (Upper Cretaceous) are new. More than 100 stratigraphical events representing more than 70 stratigraphic levels have been recognized and presented in an event-stratigraphic scheme.

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