Late Jurassic-Early Cretaceous Time Scales and Oceanic Magnetic Anomaly Block Models

Channell, James E T; Erba, Elisabetta; Nakanishi, Masao; Tamaki, Kensaku

doi:10.2110/pec.95.04.0051

Cited by 138 publications

(144 citation statements)

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“…top of the Transitional lithozone sensu Landra et al 2000) is situated almost three metres below a bundle of organic-rich horizons that are considered to be a local equivalent of the Livello Selli Event (LSE), usually referred to the early Aptian Ocean Anoxic Event 1a (Erba 1996 for references). It should be noted that Erba (in Cecca and Landra 1994) previously reported the first occurrence of the calcareous nannofossil R. irregularis Thierstein at 2.95 m, and Channell et al (1995) recognized the base of the reversed magnetozone CM0r between 4.5 m and meter 23 m at section C of Cesana Brianza. Both micropalaeontological and magnetostratigraphic markers have repeatedly been used to define the base of the Aptian Stage in the Maiolica Formation (Erba 1996).…”

Section: Central Italymentioning

confidence: 91%

New Heteroceratidae (Ammonoidea) from the late Barremian deepening succession of Marseille (Bouches-du-Rhône, France)

Frau¹,

Delanoy²,

Massé³

et al. 2016

Acta Geologica Polonica

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Investigation of the late Barremian deepening succession of the Provence platform, cropping out south of Marseille (Bouches-du-Rhône, France), has yielded a new ammonite fauna belonging to the Martelites sarasini Subzone (Martelites sarasini Zone). The fauna is dominated by representatives of the Heteroceratidae Spath, characterized by different patterns of coiling, high intraspecific variabilities and dwarfism. These heteroceratids are distinctive and utterly different from all previously known taxa, and this justifies the introduction of the new taxa Heteroceras denizoti sp. nov., Heteroceras veratiae sp. nov., Calanquites gen. nov., based on Imerites katsharavai Rouchadzé; Giovaraites gen. nov., based on Giovaraites massiliae gen. et sp. nov., Barguesiella gen. nov., based on Barguesiella goudesense gen. et sp. nov. and the closely allied Barguesiella mantei gen. et sp. nov. The occurrence of the latter species at the top of the Maiolica Formation in Italy questions its early Aptian age assumed in the literature. The newly described fauna could be considered as the first case of micromorphy in the Heteroceratidae. Its biostratigraphy, palaeoenvironmental and palaeobiogeographical significance are discussed.

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Section: Central Italymentioning

confidence: 91%

New Heteroceratidae (Ammonoidea) from the late Barremian deepening succession of Marseille (Bouches-du-Rhône, France)

Frau¹,

Delanoy²,

Massé³

et al. 2016

Acta Geologica Polonica

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“…1). Here, the time scale from late Cretaceous to present is like in Cande and Kent (1995), and before 118.0 Ma, we have modified the scale of Channell et al (1995) to be consistent with the one by Cande and Kent (1995). We can regard the distribution in Fig.…”

Section: Explanation Of CML Modelmentioning

confidence: 93%

“…1. Log-log plot of the cumulative distribution of polarity reversal length using data from Cande and Kent (1995) and Channell et al (1995).…”

Section: Explanation Of CML Modelmentioning

confidence: 99%

A Coupled Map Lattice model for geomagnetic polarity reversals that exhibits realistic scaling

Seki

Ito

2014

Earth Planet Sp

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Seki and Ito (1993) showed that the geomagnetic polarity reversals had a power-law distribution and presented a simple model in which the geodynamo was assumed to be a system of magnetic spins in a critical phase-transition state. We present an improved, more realistic model, and obtain a power exponent in agreement with the observed value, which is about −1.5. The revised model is a Coupled Map Lattice (CML). A CML is a dynamical system with discrete time and space, but continuous state. In the present model, elementary dynamo evolves autonomously according to the Lorenz map obtained from Rikitake dynamo dynamics. We examine the behavior of the system and the distribution of polarity reversal intervals for various values of parameters. We find some sets of the parameters which yield a power exponent close to −1.5.

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“…Subsequently, Alvarez et al (1977) recognized sets of magnetic polarity reversals within the Cenozoic Gubbio (Italy) sedimentary sequence. William Lowrie studied the geological and physical processes that permit pelagic sediments to keep magnetization and defined the magnetostratigraphy of those Italian sections (Lowrie et al 1982), allowing the scientific community to build and further refine the GPTS (Cox et al 1963;Heirtzler et al 1968;LaBreque et al 1977;Berggren et al 1985;Cande & Kent 1992Huestis & Acton 1997;Singer et al 2002;Channell et al 1995;Malinverno et al 2012;Ogg 2012). Today, geomagnetic reversals are routinely recognized along stratigraphic sections composed of sedimentary (marine or continental) or volcanic materials.…”

Section: Discovery Of Geomagnetic Reversalsmentioning

confidence: 99%

Magnetic methods and the timing of geological processes

Jovane

Hinnov²,

Housen

et al. 2013

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Magnetostratigraphy is best known as a technique that employs correlation among different stratigraphic sections using the magnetic directions that define geomagnetic polarity reversals as marker-horizons. The ages of the polarity reversals provide common tie points among the sections, allowing accurate time correlation. Recently, magnetostratigraphy has acquired a broader meaning, now referring to many types of magnetic measurements within a stratigraphic sequence. Many of these measurements provide correlation and age control not only for the older and younger boundaries of a polarity interval, but also within intervals. Thus, magnetostratigraphy no longer represents a dating tool based only on the geomagnetic polarity reversals, but comprises a set of techniques that includes measurements of all geomagnetic field parameters, environmental magnetism, rock magnetic and palaeoclimatic change recorded in sedimentary rocks, and key corrections to magnetic directions related to geodynamics, tectonics and diagenetic processes.

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Late Jurassic-Early Cretaceous Time Scales and Oceanic Magnetic Anomaly Block Models

Cited by 138 publications

References 0 publications

New Heteroceratidae (Ammonoidea) from the late Barremian deepening succession of Marseille (Bouches-du-Rhône, France)

New Heteroceratidae (Ammonoidea) from the late Barremian deepening succession of Marseille (Bouches-du-Rhône, France)

A Coupled Map Lattice model for geomagnetic polarity reversals that exhibits realistic scaling

Magnetic methods and the timing of geological processes

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