Parts of it can be found as far away from the Yucatan as Raton Basin, Colorado. The two prevailing theories for the event that precipitated its formation are that a cataclysmic volcanic eruption occurred, or that a gigantic meteor struck the earth, forming the Chixculub crater. The clay that constitutes it was found to contain a high percentage of iridium by Luis and Walter Alvarez, supporting the meteor theory. For 10 points, what is this term given to the point in time between two eras of the Pharenzoic when all the dinosaurs and many other forms of life were exterminated?
Parts of it can be found as far away from the Yucatan as Raton Basin, Colorado. The two prevailing theories for the event that precipitated its formation are that a cataclysmic volcanic eruption occurred, or that a gigantic meteor struck the earth, forming the Chixculub crater. The clay that constitutes it was found to contain a high percentage of iridium by Luis and Walter Alvarez, supporting the meteor theory. For 10 points, what is this term given to the point in time between two eras of the Pharenzoic when all the dinosaurs and many other forms of life were exterminated?
Parts of it can be found as far away from the Yucatan as Raton Basin, Colorado.
{K-T} Boundary [or {Cretaceous-Tertiary} Boundary]