ArticleScientific reports2026
Orbital pacing of environmental perturbations in a Greenhouse World: a 40-Myr record from Upper Devonian-Lower Carboniferous successions on the eastern margin of Gondwana.
Article in Scientific reports, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
0 citing papers in PubMed.
No citing paper in PubMed yet.
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
5 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Orbital pacing of environmental changes during the Late Devonian-Early Carboniferous (Famennian-Viséan, ~ 372-330 Ma) greenhouse Earth is investigated using high-resolution gamma-ray (GR) logs, chemostratigraphy (ICP-OES, ICP-MS, pXRF), and cyclostratigraphic analysis (multitaper method, wavelet transforms, Fischer plots, Dynamic Noise after Orbital Tuning sea-level modeling) of two petroleum wells from the Jurgurra Terrace, Canning Basin, Western Australia. The sedimentary successions (Nullara, May River, Laurel, Anderson formations) reveal a ubiquitous ~ 5-Myr orbital eccentricity amplitude modulation cycle, along with shorter Milankovitch cycles (405-kyr long-eccentricity, 100-kyr short-eccentricity, 40-50-kyr obliquity, 20-25-kyr precession), and sedimentation rates of 3.5-4.5 cm/kyr derived from evolutionary Time Optimization (eTimeOpt) and orbital tuning. Key findings are: (1) The Hangenberg Event (HE; ~ 3925-4030 m in Rafael 1) and Lower Alum Shale Event (LASE; ~ 3690-3770 m) coincide with 405-kyr eccentricity maxima, imposing monsoonal intensification, nutrient input, and euxinia (recorded by high V/Cr, U/Th, and organic carbon burial). (2) The Late Tournaisian Cooling Event (LTCE; ~ 3500 m) is synchronous with 100-kyr eccentricity-driven glacial-interglacial cycles, with lowered sea level, high Rb/Sr values, and siliciclastic progradation. (3) Wavelet analysis reveals a hierarchical orbital structure in which precession-paced ventilation ended anoxic intervals (e.g., post-HE re-oxygenation), whereas Fischer plots show highstand systems tracts equate to condensed, organic-rich sediment at eccentricity maxima. Geochemical proxies (Sr/Ba, Mg/Ca) also record salinity fluctuations that can be linked to orbital-scale hydrological cycling. DYNOT modeling illustrates that ~ 5-Myr amplitude modulation cycles controlled long-term climate stability, enhancing redox and sea-level extremes. These cycles, supported by global analogs (Ordovician-Silurian, Late Cenozoic), emphasize orbital forcing as the leading cause of greenhouse climate instability and its implications for determining Earth's climatic sensitivity in the absence of ice. The research connects celestial mechanics and Devonian-Carboniferous environmental disasters with improved predictive models for orbital signatures in the sedimentary record.
Indexed as
Identifiers
What OpenQuestion holds
Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.