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astrochronology

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Journal Article
Journal: Geology
Published: 01 June 2014
Geology (2014) 42 (6): 491-494.
... further constrain the obtained time scale by incorporating astrochronological duration estimates for the Givetian and Frasnian stages. The combination of radioisotopic dating and astrochronology results in a reduction of the uncertainty on the numerical age of the stage boundaries concerned by several...
FIGURES
Series: SEPM Special Publication
Published: 01 January 2004
DOI: 10.2110/pec.04.81.0027
EISBN: 9781565762176
...., 1997 ; Krijgsman et al., 1999 ; Sierro et al., 2001 ) to extend the astrochronology of the Mediterranean records back into the Middle Miocene (to about 12 Ma). Accord-ing to many authors ( Lourens et al., 1992 ; Lourens et al., 1996 ; Versteegh, 1994 ; Van Vugt, 2000 ) the sediments from...
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Journal Article
Journal: Geology
Published: 01 August 2000
Geology (2000) 28 (8): 695-698.
... of precession-induced oscillations of annual rainfall in southern Spain that were, in part, responsible for the increasing input of freshwater into the Mediterranean at times of sapropel formation. We demonstrate that gamma-ray and sonic astrochronology can be successfully used for interregional correlation...
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Journal Article
Journal: GSA Bulletin
Published: 01 July 2014
GSA Bulletin (2014) 126 (7-8): 956-973.
... integrate new radioisotopic data of improved accuracy with a recently published astrochronologic framework for the Niobrara Formation. New 40 Ar/ 39 Ar laser fusion ages corresponding to eight different ammonite biozones are determined by analysis of legacy samples, as well as newly collected material...
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Journal Article
Journal: GSA Bulletin
Published: 01 July 2014
GSA Bulletin (2014) 126 (7-8): 974-989.
..., including a new age from the Dunveganoceras pondi biozone (uppermost Lincoln Limestone Member), provide geochronologic constraints for the cyclostratigraphic analysis. Astrochronologic testing of the 5-mm-resolution XRF weight percent CaCO 3 data via average spectral misfit analysis yields strong evidence...
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Series: GSA Special Papers
Published: 01 April 2009
DOI: 10.1130/2009.2452(19)
... succession of pelagic limestone and marls that provides the means for an accurate and precise astrochronologic calibration of the Eocene-Oligocene transition. This 38.5-m-thick section overlaps the Oligocene section, which, at meter level 188, contains the Rupelian-Chattian boundary corresponding to the O4...
Journal Article
Journal: Geology
Published: 30 November 2018
Geology (2018) 47 (1): 19-22.
... resolution enables the detection of millennial-scale climate change as recorded by elemental abundances. We used a previously published astrochronology for the section to transform the studied series from the stratigraphic into the time domain. Spectral analysis of the time-calibrated log-transformed Ti...
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Journal Article
Journal: Geology
Published: 01 June 2017
Geology (2017) 45 (6): 567-570.
... a lack of chronostratigraphic constraints that are needed to provide the boundary conditions for geochemical models. In this study we use magnetostratigraphy and astrochronology to establish a chronostratigraphic framework for the excursion. Paleomagnetic and isotopic results from the Flinders Ranges...
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Journal Article
Journal: Geology
Published: 01 January 2012
Geology (2012) 40 (1): 7-10.
...Stephen R. Meyers; Sarah E. Siewert; Brad S. Singer; Bradley B. Sageman; Daniel J. Condon; John D. Obradovich; Brian R. Jicha; David A. Sawyer Abstract We develop an intercalibrated astrochronologic and radioisotopic time scale for the Cenomanian-Turonian boundary (CTB) interval near the Global...
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Series: GSA Special Papers
Published: 01 April 2009
DOI: 10.1130/2009.2452(08)
... with the La2004 eccentricity curve, we propose an astrochronological calibration for this important time period. Constrained by three radioisotopically dated volcanic ashes and based on a band-pass version of eccentricity that exhibits expected amplitude modulations, our astrochronology yields a refined age...
Journal Article
Journal: GSA Bulletin
Published: 01 September 2004
GSA Bulletin (2004) 116 (9-10): 1043-1058.
... data with the continental Newark astrochronological polarity time scale (APTS) for development of an integrated Late Triassic time scale. The relatively stable average values of δ 18 O centered on 0‰ are a strong indication that the Cherty Limestone at Pizzo Mondello suffered very little diagenetic...
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<b>Astrochronologic</b> calibration of the Contessa Road–Bottaccione (CR-BTT) comp...
Published: 01 November 2018
Figure 11. Astrochronologic calibration of the Contessa Road–Bottaccione (CR-BTT) composite section plotted against chemostratigraphic and magnetostratigraphic records. The tuning was performed using the ∼4 m (E1) component. The lower panel represents the short eccentricity (black line) and long
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<b>Astrochronologic</b> calibration of the Smirra 1 core together with the bulk ca...
Published: 01 November 2018
Figure 12. Astrochronologic calibration of the Smirra 1 core together with the bulk carbon isotope and magnetostratigraphic records. The tuning was performed using the ∼360 cm (E1) component. The lower panel represents the short eccentricity (black line) and long eccentricity (gray line) from
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<b>Astrochronologic</b> calibration of the Contessa Road–Bottaccione (CR-BTT) comp...
Published: 01 November 2018
Figure 11. Astrochronologic calibration of the Contessa Road–Bottaccione (CR-BTT) composite section plotted against chemostratigraphic and magnetostratigraphic records. The tuning was performed using the ∼4 m (E1) component. The lower panel represents the short eccentricity (black line) and long
Image
<b>Astrochronologic</b> calibration of the Smirra 1 core together with the bulk ca...
Published: 01 November 2018
Figure 12. Astrochronologic calibration of the Smirra 1 core together with the bulk carbon isotope and magnetostratigraphic records. The tuning was performed using the ∼360 cm (E1) component. The lower panel represents the short eccentricity (black line) and long eccentricity (gray line) from
Image
SEDIMENTATION RATE CONSTRAINTS FOR THE ANGUS CORE <b>ASTROCHRONOLOGIC</b> TESTING,...
Published: 01 July 2014
TABLE 1. SEDIMENTATION RATE CONSTRAINTS FOR THE ANGUS CORE ASTROCHRONOLOGIC TESTING, BASED ON RADIOISOTOPICALLY DATED BENTONITES
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<b>Astrochronologic</b> information further constrains Devonian chronology. Devoni...
in > Geology
Published: 01 June 2014
Figure 2. Astrochronologic information further constrains Devonian chronology. Devonian time scale shown is the result of subsampling those chronologies that are in agreement with astrochronologic time constraints. Combination of U-Pb radioisotopic dating and astrochronology yields significant
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Comparison of Maastrichtian <b>astrochronologies</b>, with grey bands indicating t...
Published: 01 March 2014
Fig. 5. Comparison of Maastrichtian astrochronologies, with grey bands indicating the identified 405 kyr cycles, numbered Ma 405 1, Ma 405 2, …, from the K–Pg boundary downwards, following Husson et al . (2011) . From left to right is shown the cyclostratigraphic interpretation of Husson et
Journal Article
Journal: GSA Bulletin
Published: 01 November 2018
GSA Bulletin (2018) 131 (3-4): 499-520.
...Figure 11. Astrochronologic calibration of the Contessa Road–Bottaccione (CR-BTT) composite section plotted against chemostratigraphic and magnetostratigraphic records. The tuning was performed using the ∼4 m (E1) component. The lower panel represents the short eccentricity (black line) and long...
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Series: Geological Society, London, Special Publications
Published: 01 January 2018
DOI: 10.1144/SP450.17
EISBN: 9781786203311
... for the base-Artinskian, 272.95±0.11 Ma for the Cisuralian–Guadalupian boundary, 265.22±0.34 Ma for the base-Capitanian, 254.14±0.12 Ma for the base-Changhsingian and 251.90±0.10 Ma for the Permian–Triassic boundary. Extension of modern astrochronological methods to the Palaeozoic Era presents new...
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