NATURAL HISTORY - K-T BOUNDARY MATERIAL GROUP Upper Cretaceous Period (Campanian), 76-75 million years BP A group of samples of material from the K-T Boundary of the Upper Cretaceous Period of Trochu, Alberta. 54 grams total, 3-32mm (1/4 - 1 1/4"). Fine condition. [No Reserve] Provenance From the Pradi Collection, Boston, USA; acquired during 1980s. Footnotes Essentially carbon, this material also sometimes contains Cretaceous aged amber. Further evidence of the impact of an asteroid as the cause of this last great extinction can be determined from the presence of the element iridium found within this layer. Iridium of this concentration does not form naturally on the earth, but is commonly found in celestial objects such as asteroids.
NATURAL HISTORY - K-T BOUNDARY MATERIAL GROUP Upper Cretaceous Period (Campanian), 76-75 million years BP A group of samples of material from the K-T Boundary of the Upper Cretaceous Period of Trochu, Alberta. 54 grams total, 3-32mm (1/4 - 1 1/4"). Fine condition. [No Reserve] Provenance From the Pradi Collection, Boston, USA; acquired during 1980s. Footnotes Essentially carbon, this material also sometimes contains Cretaceous aged amber. Further evidence of the impact of an asteroid as the cause of this last great extinction can be determined from the presence of the element iridium found within this layer. Iridium of this concentration does not form naturally on the earth, but is commonly found in celestial objects such as asteroids.
.jpg?w=400 "Source: Christie's")
.jpg "Source: Christie's")
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.jpg "Source: Christie's")
.jpg "Source: Christie's")
