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Dating Chilesaurus to Tithonian (Jurassic)



Ben Creisler
bcreisler@gmail.com


A new paper:


Manuel Suárez , Rita De La Cruz, Mark Fanning, Fernando Novas &
Leonardo Salgado (2015)
Tithonian age of dinosaur fossils in central Patagonian, Chile: U–Pb
SHRIMP geochronology.
International Journal of Earth Sciences (advance online publication)
DOI: 10.1007/s00531-015-1287-7
http://link.springer.com/article/10.1007/s00531-015-1287-7

Three Tithonian concordant U–Pb SHRIMP zircon ages of 148.7 ± 1.4,
147.9 ± 1.5 and 147.0 ± 1.0 from tuffs intercalated in a clastic
sedimentary succession with exceptional dinosaur bones including the
new taxon Chilesaurus diegosuarezi gen. et sp. nov. exposed in central
Chilean Patagonia (ca. 46°30′S) are reported herein. The fossiliferous
beds accumulated in a synvolcanic fan delta reaching a shallow marine
basin as indicated by glauconite present in some of the beds, and
coeval with the beginning of the transgression of the Aysén Basin.