scholarly journals High resolution carbon isotopic analysis across the Ordovician-Silurian boundary of the Wangjiawan section, South China

2007 ◽  
Vol 64 ◽  
pp. 83-87
Author(s):  
Hiromi Yamamoto ◽  
Yoshitaka Hamada ◽  
Yue Li ◽  
Yusuke Setsuda ◽  
Ryo Matsumoto
Keyword(s):  
High Resolution ◽  
South China ◽  
Isotopic Analysis ◽  
Carbon Isotopic

scholarly journals dummyHigh resolution carbon isotopic analysis across the Ordovician-Silurian boundary of the Wangjiawan section, South China

1500 ◽  
Vol 99964 ◽  
pp. 99983-99987
Author(s):  
authorHiromi dummyYamamoto ◽  
authorYoshitaka dummyHamada ◽  
authorYue dummyLi ◽  
authorYusuke dummySetsuda ◽  
authorRyo dummyMatsumoto
Keyword(s):  
South China ◽  
Isotopic Analysis ◽  
Carbon Isotopic

scholarly journals Isotopic Evidence for Long-Distance Connections of the AD Thirteenth-Century Promontory Caves Occupants

2021 ◽  
pp. 1-23
Author(s):  
Jessica Z. Metcalfe ◽  
John W. Ives ◽  
Sabrina Shirazi ◽  
Kevin P. Gilmore ◽  
Jennifer Hallson ◽  
...  
Keyword(s):  
Material Culture ◽  
Thirteenth Century ◽  
Isotopic Analysis ◽  
Bone Collagen ◽  
Turnover Rates ◽  
Long Distance ◽  
Carbon Isotopic ◽  
Local Plant ◽  
Northern Utah ◽  
C Value

The Promontory caves (Utah) and Franktown Cave (Colorado) contain high-fidelity records of short-term occupations by groups with material culture connections to the Subarctic/Northern Plains. This research uses Promontory and Franktown bison dung, hair, hide, and bone collagen to establish local baseline carbon isotopic variability and identify leather from a distant source. The ankle wrap of one Promontory Cave 1 moccasin had a δ13C value that indicates a substantial C4 component to the animal's diet, unlike the C3 diets inferred from 171 other Promontory and northern Utah bison samples. We draw on a unique combination of multitissue isotopic analysis, carbon isoscapes, ancient DNA (species and sex identification), tissue turnover rates, archaeological contexts, and bison ecology to show that the high δ13C value was not likely a result of local plant consumption, bison mobility, or trade. Instead, the bison hide was likely acquired via long-distance travel to/from an area of abundant C4 grasses far to the south or east. Expansive landscape knowledge gained through long-distance associations would have allowed Promontory caves inhabitants to make well-informed decisions about directions and routes of movement for a territorial shift, which seems to have occurred in the late thirteenth century.

scholarly journals Phylogenetic model of <i>Follicucullus</i> lineages (Albaillellaria, Radiolaria) based on high-resolution biostratigraphy of the Permian Bancheng Formation, Guangxi, South China

2014 ◽  
Vol 33 (2) ◽  
pp. 179-192 ◽  
Author(s):  
Lei Zhang ◽  
Tsuyoshi Ito ◽  
Qinglai Feng ◽  
Martial Caridroit ◽  
Taniel Danelian
Keyword(s):  
High Resolution ◽  
South China ◽  
Guangxi Province ◽  
Phylogenetic Model ◽  
Stratigraphic Ranges ◽  
Abundant Genus ◽  
Radiolarian Assemblages

Abstract. High-resolution sampling was performed on four Permian sections in Guangxi Province, South China (Gujingling, Sanpaoling, Guoyuan and Yutouling sections). We report abundant and well-preserved Guadalupian–Lopingian radiolarian assemblages, with 25 species belonging to three genera of the order Albaillellaria. Among them, the most abundant genus is Follicucullus with 17 species: F. bipartitus, F. charveti, F. sp. cf. F. charveti, F. dilatatus, F. falx, F. sp. cf. F. falx, F. guangxiensis, F. hamatus, F. monacanthus, F. sp. cf. F. monacanthus, F. orthogonus, F. sp. cf. F. orthogonus, F. porrectus, F. scholasticus, F. sp. cf. F. scholasticus, F. ventricosus and F. sp. cf. F. ventricosus. On the basis of composite stratigraphic ranges, this study suggests four Interval Zones in ascending order, namely F. monacanthus, F. porrectus, F. scholasticus and F. charveti Interval Zones. We provide a phylogenetic model for Follicucullus based on their morphological affinities and stratigraphic distribution. The genus Follicucullus originated from Pseudoalbaillella fusiformis, with F. monacanthus as the forerunner species from which two contemporary species then radiated: F. dilatatus and F. porrectus. Follicucullus porrectus is a long-lasting species, it is abundant in our material and several Follicucullus lineages originated from it. In terms of evolution it is considered to be the ancestor of a number of Follicucullus species.

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