LBNL Image Library -- Collection BERKELEY-LAB/PEOPLE/INDIVIDUALS

Image File: 96703338
Title: Luis Alvarez and son Walter near Gubbio, Italy
Description: At a limestone outcropping near Gubbio, Italy, physicist Luis Alvarez and his geologist son Walter, examined the clay layer that launched their theory of 'The Great Dying.' Surprisingly high concentrations of iridium in the clay at Gubbio and many other sites indicated that the mass extinction was the result of a collision between Earth and a huge extraterrestrial object.
Citation Caption: LBL Research Review, Vol. 12, No. 1, Spring 1987, p.19 | At a limestone outcropping near Gubbio, Italy, physicist Luis Alvarez and his geologist son Walter, examined the clay layer that launched their theory of 'The Great Dying.' Surprisingly high concentrations of iridium in the clay at Gubbio and many other sites indicated that the mass extinction was the result of a collision between Earth and a huge extraterrestrial object.
Date: September 1981
Division: Physics
People: Luis Alvarez, Walter Alvarez
TEID Doc ID: XBD 9607-03338.TIF