Astronomical duration of polarity Chron C31r (Lower Maastrichtian): cyclostratigraphy of ODP Site 762 (Indian Ocean) and the Contessa Highway section (Gubbio, Italy)
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The duration of polarity Chron C31r is estimated with a
cyclostratigraphic approach. Two sites are investigated: ODP
Site 762 (Indian Ocean) and the Contessa Highway section
(Gubbio, Italy). Cyclostratigraphic analysis is performed on
greyscale variations (Site 762) and magnetic susceptibility
variations (Contessa section). Both sites reveal an astronomical
control of the sedimentation, highlighted by the identification
of all the orbital periodicities. Cyclostratigraphic
signals are tuned on 405 ka eccentricity cycles extracted from
the La04 astronomical solution. In both sites, cycle counting
gives an estimate of the duration of polarity Chron C31r of
about 2.09 ± 0.03 Ma.
cyclostratigraphic approach. Two sites are investigated: ODP
Site 762 (Indian Ocean) and the Contessa Highway section
(Gubbio, Italy). Cyclostratigraphic analysis is performed on
greyscale variations (Site 762) and magnetic susceptibility
variations (Contessa section). Both sites reveal an astronomical
control of the sedimentation, highlighted by the identification
of all the orbital periodicities. Cyclostratigraphic
signals are tuned on 405 ka eccentricity cycles extracted from
the La04 astronomical solution. In both sites, cycle counting
gives an estimate of the duration of polarity Chron C31r of
about 2.09 ± 0.03 Ma.
| Original language | English |
|---|---|
| Journal | Geological Magazine |
| Pages (from-to) | 345-351 |
| Number of pages | 7 |
| ISSN | 0016-7568 |
| DOIs | |
| Publication status | Published - Nov 2011 |
| Externally published | Yes |
ID: 272601475