10.6084/m9.figshare.3457649.v1
Mark A. Woods
Mark A.
Woods
Philip R. Wilby
Philip R.
Wilby
Melanie J. Leng
Melanie
J. Leng
Adrian W.A. Rushton
Adrian W.A.
Rushton
Mark Williams
Mark
Williams
The Furongian (late Cambrian) Steptoean Positive Carbon Isotope Excursion (SPICE) in Avalonia
Geological Society of London
2016
Olenus Biozone
coeval base
siliciclastic succession
excursion approaches
Furongian
145 m
Carbon Isotope Excursion
palaeocontinental Baltica
English succession
Steptoean
Outwoods Shale Formation
Glyptagnostus reticulatus Biozone
SPICE
Geology
2016-06-22 11:40:19
Dataset
https://geolsoc.figshare.com/articles/dataset/The_Furongian_late_Cambrian_Steptoean_Positive_Carbon_Isotope_Excursion_SPICE_in_Avalonia/3457649
<p>The Steptoean Positive Carbon Isotope Excursion (SPICE) of earliest late Cambrian (Furongian) age is identified in England.
The excursion is found within a <em>c</em>. 145 m thick siliciclastic succession within the middle and higher part of the Outwoods Shale Formation of Warwickshire,
and reaches a maximum δ<sup>13</sup>C<sub>org</sub> amplitude of 4.1‰ at values of −25.6‰. Biostratigraphical data show that the excursion occupies the greater part of the <em>Olenus</em> Biozone, an equivalent of the <em>Glyptagnostus reticulatus</em> Biozone that marks the base of the Furongian and coeval base of the Steptoean in North America. The amplitude of the excursion
approaches that recorded in limestone-dominated Laurentian successions, and is greater than that recently documented for organic-rich
mudstones of palaeocontinental Baltica in southern Sweden. A minor positive excursion above the SPICE may equate with a similar
excursion recognized in Siberia. The SPICE in the Outwoods Shale Formation seems closely linked to the widely recognized early
Furongian eustatic sea-level rise. There is no evidence in the English succession for slightly later regression, elsewhere
considered coincident with the peak of the excursion and pivotal to some previous models explaining the SPICE.
</p>