title: The Sun-Earth connect 3: lessons from the periodicities of deep time influencing sea-level change and marine extinctions in the geological record.
abstract: A number of papers since Rampino and Stothers published in Science 1984 have reported common periodicities in a wide range of climate, geomagnetic, tectonic and biological proxies, including marine extinctions. Single taper and multitaper spectral analysis of marine fluctuations between the Late Cretaceous and the Miocene replicates a number of the published harmonics. Whereas these common periodicities have been argued to have a galactic origin, this paper presents an alternative fractal model based on large scale fluctuations of the magnetic field of the Sun. The fluctuations follow a self-similar matrix of periodicities and the solutions of the differential equation allow for models to be constructed predicting extreme events for solar emissions. A comparison to major Phanerozoic extinction, climate and geomagnetic events, captured in the geological record, show a striking loop symmetry summarised in major 66 Ma irradiance and electromagnetic pulses from the Sun.
authors.affiliation: Geography and Planning, University of New England, Armidale, 2350 Australia.
authors.forename: Robert Gv
authors.initials: RG
authors.lastname: Baker
authors.affiliation: Earth Sciences, University of New England, Armidale, 2350 Australia.
authors.forename: Peter G
authors.initials: PG
authors.lastname: Flood
keywords: Geological record; Periodicity; Self-similarity; Solar model