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Cretaceous-Tertiary boundary

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Cre`ta´ceous-Tert´i`ar`y boun´da`ry    (krė`tā´shŭs)
n.1.a thin layer of geologic deposits, of varying thickness in different parts of the world, found between the geological strata identified as Cretaceous and the strata above, identified as Tertiary; also, the time point or period marking the boundary between the Cretaceous and Tertiary periods.
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In 2003, they reported that rock strata in North America dating to the Cretaceous-Tertiary boundary showed little evidence of charcoal, which would be expected to be produced from burning vegetation.
'Dino-killing' meteorite did not start global wildfires 65 million ... by Asian News International
Everybody knows about the cretaceous-tertiary boundary when all the dinosaurs went extinct," said Carpenter.
One third of reef-building corals face extinction, study shows by guardian.co.uk / guardian.co.uk
The Cretaceous unit cropping out in the map area consists of the late Cretaceous Owl Creek Formation with the Cretaceous-Tertiary boundary forming the upper contact.
Geology of the Walnut Miss.-Tenn. 7.5 minute topographic quadrangle by Swann, Charles T. / Journal of the Mississippi Academy of Sciences
 
 
 
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