Early Eocene carbon isotope excursions and landscape destabilization at eccentricity minima: Green River Formation of Wyoming

Astronomical calibration of the Ypresian timescale: implications for seafloor spreading rates and the chaotic behavior of the solar system?

“…At this point more precise estimates of the mean width of magnetic anomalies and their error are required to be able to evaluate and improve the GPTS in the late Eocene. However, comparison to the GPTS models from terrestrial successions corroborates the finding (Westerhold et al, 2015) that the model of Tsukui and Clyde (2012) more closely resembles the marine GPTS than the model of Smith et al (2010Smith et al ( , 2014 (Fig. 6).…”

“…(b) Geomagnetic polarity timescale of CK95 (Cande and Kent, 1995), GPTS2004 (Ogg and Smith, 2004), and GPTS2012 Vandenberghe et al, 2012) compared to astronomical calibrations of magnetochrons from Contessa Highway (Jovane et al, 2010), Site 1260 , Site 1258 (Westerhold and Röhl, 2009;Westerhold et al, 2012), Site 1263 (Westerhold et al, 2015), and the new Ypresian GPTS (this study, W16) from 40 to 54 Ma. Terrestrial calibration of the GPTS from the Green River Formation (Smith et al, 2010(Smith et al, , 2014Tsukui and Clyde, 2012) is also shown. Small red dots with error bars mark the radioisotopic calibration points used for CK95, GPTS2004, GPTS2012, and Smith et al (2010); green circles show calibration points for the terrestrial sections used by Tsukui and Clyde (2012).…”

Examining the spatial consistency of palaeosol proxies: Implications for palaeoclimatic and palaeoenvironmental reconstructions in terrestrial sedimentary basins

“…Hamer et al ., ; Weissmann et al ., ; Smith et al ., ). This finding is congruent with the concept that sedimentary processes within large continental basins like the GRB may exhibit cyclical, and perhaps orbitally forced (Hamer et al ., ; Abels et al ., ; Smith et al ., ), patterns of stability/instability on long timescales, particularly during periods characterized by extreme climate conditions (e.g. Foreman et al ., ; Smith et al ., ).…”

“…Smith et al ., , ), this and other well‐developed and widespread palaeocatenas throughout the stratigraphic section (Hyland & Sheldon, ) also indicate at least periodic stability within the broader setting of a large distributive fluvial system (e.g. Hamer et al ., ; Weissmann et al ., ; Smith et al ., ). This finding is congruent with the concept that sedimentary processes within large continental basins like the GRB may exhibit cyclical, and perhaps orbitally forced (Hamer et al ., ; Abels et al ., ; Smith et al ., ), patterns of stability/instability on long timescales, particularly during periods characterized by extreme climate conditions (e.g.…”

“…This finding is congruent with the concept that sedimentary processes within large continental basins like the GRB may exhibit cyclical, and perhaps orbitally forced (Hamer et al ., ; Abels et al ., ; Smith et al ., ), patterns of stability/instability on long timescales, particularly during periods characterized by extreme climate conditions (e.g. Foreman et al ., ; Smith et al ., ). Based on these results, it is clear that the continued study of terrestrial sediments like palaeosols is crucial for understanding and providing analogues for basin depositional characteristics and pedogenesis under various timescales and palaeoenvironmental conditions, and may lead to important developments in terms of predicting critical zone characteristics and surface processes in the future.…”