Results 21 to 30 of about 1,798,975 (310)
ASTRONOMICAL CALIBRATION OF THE FAMENNIAN (UPPER DEVONIAN) TIME SCALE [PDF]
Geological Society of America Abstracts with Programs, 2017 The Late Devonian was affected by major, irreversible changes including two of the most severe biodiversity crises in Earth’s history, the so-called Kellwasser and Hangenberg Events (respectively near the Frasnian – Famennian (F-F) and the Devonian – Carboniferous (D-C) boundaries).
Pas, D. +5 more
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Extracting causation from millennial-scale climate fluctuations in the last 800 kyr
Scientific Reports, 2022 The detection of cause-effect relationships from the analysis of paleoclimatic records is a crucial step to disentangle the main mechanisms at work in the climate system.
Marco Baldovin +3 more
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Energies, 2023 The late Eocene succession of the Dongying Depression forms a highly productive hydrocarbon source. However, due to lack of an unambiguous fine chronostratigraphic framework for the late Eocene stratigraphy, it is challenging to understand the paleolake ...
Zhongheng Sun +4 more
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TIME SCALES FOR ACHIEVING ASTRONOMICAL CONSENSUS [PDF]
International Journal of Modern Physics D, 2008 The history of science can be recounted in many ways: by addressing the work of one person or school; by starting with the ancients and working chronologically up to the present; by focusing on a particular century; or by tracing a particular important idea as far back and forward as it can be found. The present discussion does none of these.
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Adiabatic Invariants in Stellar Dynamics: I. Basic concepts [PDF]
, 1994 The adiabatic criterion, widely used in astronomical dynamics, is based on the harmonic oscillator. It asserts that the change in action under a slowly varying perturbation is exponentially small.
Weinberg, Martin D.
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Implications of astronomical climate cycles to the chronology of the Triassic [PDF]
, 2000 A high resolution climate record from a thick, continuous sedimentary sequence in the Newark basin provides the basis for an astronomically calibrated time scale for the Late Triassic.
Kent, Dennis V., Olsen, Paul E.
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Astronomical Units, Constants and Time-Scales [PDF]
Highlights of Astronomy, 1974 As I have already reported (Trans. IAU XVA, 9, 1973), the Working Group on Units and Time-scales was not able to reach any firm conclusions on whether the concepts of the astronomical unit and ephemeris time should be retained or replaced by the SI unit of length (metre) and atomic time.
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Distinct responses of East Asian summer and winter monsoons to astronomical forcing [PDF]
Climate of the Past, 2011 Influences of the Earth's astronomical forcing on the evolution of East Asian monsoon have been demonstrated with various geological records and climate models. Here, we present time series of climatic proxies from the Chinese Loess Plateau and Sanbao/
Z. G. Shi +5 more
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BP Gulf of Mexico Neogene Astronomically-tuned Time Scale (BP GNATTS) [PDF]
GSA Bulletin, 2019 AbstractThis paper introduces an integrated Neogene microfossil biostratigraphic chart developed within post-merger BP for the Gulf of Mexico Basin and is the first published industrial framework “fully-tuned” to orbital periodicities. Astronomical-tuning was accomplished through a 15-year research program on the Ocean Drilling Program’s (ODP) Leg 154 ...
J.A. Bergen +8 more
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