Cretacious Tertiary Boundary

From Bill Bryson's Book: "A Short History of Nearly Everything".

From Bill Bryson’s Book: “A Short History of Nearly Everything”.

Iridium Anomaly is the asteroid-laden dust layer I often describe as “Dinosaur-killing cloud of extra-terrestrial dust from the K-T Band”, quoting Jim Broda.

Sediment from the first core taken that displayed a clear chemical signature … not big, but a tiny spike at the depth in the core of about 65 million years ago, called the Cretacious Tertiary Boundary. The sediment is from 30.44°19.9’ north, 157°49.4’ west, 3100 to 3115 meters deep.  It’s from ship LongLines, cruise 44, October 1976, Leg #1.

The split core samples in the image show the dark area called “the injecta layer” and K/T Boundary.

Thanks to Brian Huber at the Smithsonian's Museum of Natural History,  for giving me permission to use this slide.

Thanks to Brian Huber at the Smithsonian’s Museum of Natural History, for giving me permission to use this slide.

 

I have this material because I made a gift to memorialize Charles David Hollister, which I gave to the Woods Hole Oceanographic Institution.  A small amount of the sediment remains.  For more information, search with keywords found in text here as well as the name Luis Walter Alvarez, a physicist awarded with a Nobel Prize in 1968.

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