Microbial components and metamorphic grade of Miaolingian (Cambrian) black shales from the Burin Peninsula, Newfoundland, Canada DOI
Blanca Martínez-Benítez, Andrea Mills, J. Javier Álvaro

et al.

Atlantic Geoscience, Journal Year: 2025, Volume and Issue: 61, P. 207 - 223

Published: May 17, 2025

The analysis of microbial and palynological remains in Cambrian shales is useful for biostratigraphic palaeoecological purposes but, outcrops affected by contact metamorphism, also discriminating burial metamorphic temperatures. composition the Miaolingian black from Pleasant View Formation (Inlet Group) Burin Peninsula consists monospecific cyanobacterial associations Bavlinella faveolata, a cosmopolitan taxon that characterized eutrophication episodes Neoproterozoic to times. specimens show varying degrees degradation under thin-section (2D) Field Emission Gun Scanning Electron Microscopy (FEGSEM, 3D). Raman Spectra Carbonaceous Materials (RSCM) thermometry applied both acritarchs meshworks amorphous organic matter has reported average temperatures 300 343 ºC, whereas standardized Crystallinity Index Standard value 0.35 suggests slightly below anchizone-epizone boundary, established at ºC. most likely fit peak temperature recorded black-shale samples, collected close Upper Devonian St. Lawrence granitic intrusions, within 300-350 ºC interval.

Language: Английский

Middle Ordovician climatic and oceanic destabilization in a slope-setting of the Yangtze platform, South China, and its role as a regional brake on the Ordovician radiations DOI
C. Fang, Mu Liu, Chengcheng Zhang

et al.

Palaeogeography Palaeoclimatology Palaeoecology, Journal Year: 2024, Volume and Issue: 648, P. 112265 - 112265

Published: May 14, 2024

Language: Английский

Citations

7
Microbial components and metamorphic grade of Miaolingian (Cambrian) black shales from the Burin Peninsula, Newfoundland, Canada DOI
Blanca Martínez-Benítez, Andrea Mills, J. Javier Álvaro

et al.

Atlantic Geoscience, Journal Year: 2025, Volume and Issue: 61, P. 207 - 223

Published: May 17, 2025

The analysis of microbial and palynological remains in Cambrian shales is useful for biostratigraphic palaeoecological purposes but, outcrops affected by contact metamorphism, also discriminating burial metamorphic temperatures. composition the Miaolingian black from Pleasant View Formation (Inlet Group) Burin Peninsula consists monospecific cyanobacterial associations Bavlinella faveolata, a cosmopolitan taxon that characterized eutrophication episodes Neoproterozoic to times. specimens show varying degrees degradation under thin-section (2D) Field Emission Gun Scanning Electron Microscopy (FEGSEM, 3D). Raman Spectra Carbonaceous Materials (RSCM) thermometry applied both acritarchs meshworks amorphous organic matter has reported average temperatures 300 343 ºC, whereas standardized Crystallinity Index Standard value 0.35 suggests slightly below anchizone-epizone boundary, established at ºC. most likely fit peak temperature recorded black-shale samples, collected close Upper Devonian St. Lawrence granitic intrusions, within 300-350 ºC interval.

Language: Английский

Citations

0