scholarly journals Astronomical time scale for the Middle Oxfordian to Late Kimmeridgian in the Swiss and French Jura Mountains

2007 ◽  
Vol 100 (3) ◽  
pp. 407-429 ◽  
Author(s):  
André Strasser
Keyword(s):  
Time Scale ◽  
Jura Mountains ◽  
French Jura ◽  
Astronomical Time

Towards a stable astronomical time scale for the Paleocene: Aligning Shatsky Rise with the Zumaia – Walvis Ridge ODP Site 1262 composite

2015 ◽  
Vol 48 (1) ◽  
pp. 91-110 ◽  
Author(s):  
Frederik J. Hilgen ◽  
Hemmo A. Abels ◽  
Klaudia F. Kuiper ◽  
Lucas J. Lourens ◽  
Mariëtte Wolthers
Keyword(s):  
Time Scale ◽  
Shatsky Rise ◽  
Walvis Ridge ◽  
Astronomical Time

scholarly journals Solar System chaos and the Paleocene–Eocene boundary age constrained by geology and astronomy

Science ◽  
2019 ◽  
Vol 365 (6456) ◽  
pp. 926-929 ◽  
Author(s):  
Richard E. Zeebe ◽  
Lucas J. Lourens
Keyword(s):  
Solar System ◽  
Time Scale ◽  
Dynamical Evolution ◽  
Resonance Transition ◽  
Fundamental Frequencies ◽  
Thermal Maximum ◽  
Astronomical Time ◽  
Geologic Data

Astronomical calculations reveal the Solar System’s dynamical evolution, including its chaoticity, and represent the backbone of cyclostratigraphy and astrochronology. An absolute, fully calibrated astronomical time scale has hitherto been hampered beyond ~50 million years before the present (Ma) because orbital calculations disagree before that age. Here, we present geologic data and a new astronomical solution (ZB18a) showing exceptional agreement from ~58 to 53 Ma. We provide a new absolute astrochronology up to 58 Ma and a new Paleocene–Eocene boundary age (56.01 ± 0.05 Ma). We show that the Paleocene–Eocene Thermal Maximum (PETM) onset occurred near a 405-thousand-year (kyr) eccentricity maximum, suggesting an orbital trigger. We also provide an independent PETM duration (170 ± 30 kyr) from onset to recovery inflection. Our astronomical solution requires a chaotic resonance transition at ~50 Ma in the Solar System’s fundamental frequencies.

scholarly journals Evolution of a Late Oxfordian: early Kimmeridgian carbonate platform, French Jura Mountains

2015 ◽  
Vol 108 (2-3) ◽  
pp. 273-288 ◽  
Author(s):  
Nicolas Olivier ◽  
Elsa Cariou ◽  
Pierre Hantzpergue
Keyword(s):  
Carbonate Platform ◽  
Jura Mountains ◽  
French Jura
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