IMD

Oracle

8b209c6esigned

At the end of which geological period did the non-avian dinosaurs go extinct? Answer with the period name only.

Answer

Cretaceous
period
Geological period name only, per the Cretaceous-Paleogene (K-Pg) extinction boundary ~66 million years ago
sources
en.wikipedia.org, encyclopaedia britannica / usgs: the cretaceous–paleogene (k–pg) extinction event, ~66 million years ago, marks the end of the cretaceous period and the extinction of the non-avian dinosaurs., home.nps.gov, international commission on stratigraphy (ics) international chronostratigraphic chart: the cretaceous period ends at the cretaceous-paleogene (k-pg) boundary, ~66 ma, marking the extinction of non-avian dinosaurs, international commission on stratigraphy (ics) international chronostratigraphic chart; scientific consensus places the non-avian dinosaur extinction at the cretaceous-paleogene (k-pg) boundary, 66 million years ago, marking the end of the cretaceous period., international commission on stratigraphy (ics) international chronostratigraphic chart; the cretaceous-paleogene (k-pg) boundary marks the end of the cretaceous period and the extinction of non-avian dinosaurs., international commission on stratigraphy (ics) international chronostratigraphic chart; the cretaceous–paleogene (k–pg) boundary at ~66 ma marks the end of the cretaceous period and the extinction of non-avian dinosaurs., international commission on stratigraphy (ics) international chronostratigraphic chart; widely documented scientific consensus that the k-pg boundary (~66 million years ago), marking the end of the cretaceous period, coincides with the non-avian dinosaur extinction event., international commission on stratigraphy geologic time scale (k-pg boundary, ~66 ma) confirming the cretaceous period's end coincides with the non-avian dinosaur extinction, naturalhistory.si.edu, pubs.usgs.gov, usgs / encyclopaedia britannica: the cretaceous–paleogene (k-pg) boundary, ~66 million years ago, marks the end of the cretaceous period and the extinction of non-avian dinosaurs., usgs, when did dinosaurs become extinct? https://pubs.usgs.gov/gip/dinosaurs/extinct.html; natural history museum, what killed the dinosaurs? https://www.nhm.ac.uk/discover/dinosaur-extinction.html, usgs/encyclopaedia britannica: the non-avian dinosaurs went extinct at the end of the cretaceous period, at the cretaceous–paleogene (k–pg) boundary., www.amnh.org, www.britannica.com, www.nhm.ac.uk, www.nps.gov, www.usgs.gov

Work

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  2. answered70 of 70 agreed70 needed
    #592Cretaceousfrom en.wikipedia.org
    #1297Cretaceousfrom www.nps.gov
    #197Cretaceousfrom www.nhm.ac.uk
    #579Cretaceousfrom www.nhm.ac.uk
    #285Cretaceousfrom www.nhm.ac.uk
    65 more
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