scholarly journals Localized backarc extension in an overall compressional setting during the assembly of Nuna: Geochemical and isotopic evidence from Orosirian (1883‐1848 Ma) mafic magmatism of the Aillik Group, Labrador, Canada

2021 ◽  
Author(s):  
A.M. Hinchey
Keyword(s):  
Mafic Magmatism ◽  
Isotopic Evidence

Spectroscopic and oxygen isotopic evidence for low and high temperature origin of talc

1986 ◽  
Vol 109 (3) ◽  
pp. 253-263 ◽  
Author(s):  
Yves Noack ◽  
Alain Decarreau ◽  
Alain Manceau
Keyword(s):  
High Temperature ◽  
Isotopic Evidence ◽  
Oxygen Isotopic

Origin of the Sudbury Complex by Meteoritic Impact: Neodymium Isotopic Evidence

Science ◽  
1985 ◽  
Vol 230 (4724) ◽  
pp. 436-439 ◽  
Author(s):  
B. E. FAGGART ◽  
A. R. BASU ◽  
M. TATSUMOTO
Keyword(s):  
Meteoritic Impact ◽  
Isotopic Evidence

Early Maize in Northeastern North America: A Comment on Emerson and Colleagues

2021 ◽  
Vol 86 (2) ◽  
pp. 425-427
Author(s):  
John P. Hart ◽  
William A. Lovis ◽  
M. Anne Katzenberg
Keyword(s):  
North America ◽  
Great Lakes ◽  
Empirical Evidence ◽  
River Valley ◽  
Human Bone ◽  
Northeastern North America ◽  
Isotopic Evidence ◽  
St Lawrence River

Emerson and colleagues (2020) provide new isotopic evidence on directly dated human bone from the Greater Cahokia region. They conclude that maize was not adopted in the region prior to AD 900. Placing this result within the larger context of maize histories in northeastern North America, they suggest that evidence from the lower Great Lakes and St. Lawrence River valley for earlier maize is “enigmatic” and “perplexing.” Here, we review that evidence, accumulated over the course of several decades, and question why Emerson and colleagues felt the need to offer opinions on that evidence without providing any new contradictory empirical evidence for the region.

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