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The next meeting of the Los Alamos Geological Society will begin at 7:30 p.m. Tuesday at the Christian Church, 92 East Road. The featured speaker will be Dr. Robert Hermes of Los Alamos National Laboratory. His talk is entitled, “Trinitite — The Atomic Rock.”
The world’s first atomic explosion at the Trinity Site, N.M. on July 16, 1945 was the culmination of the Manhattan Project. The explosion left a green, glassy material composed of melted arkosic sand, which was highly radioactive due to both fission products and neutron activation of the sand alluvium from the Oscuro Mountain range in southern New Mexico.
The topics covered will include the discovery of microtektites in ant sand obtained from the Trinity Site, the theory of how trinitite was actually formed (not like everyone thinks), residual radioactivity, micro XRF and petrographic analysis, numerous photographs and a display of interesting types of trinitite from Hermes’ personal collection (which will soon be included in a new Trinity Site display at the Bradbury Science Museum). The topic of nuclear forensics will also be discussed, and in addition, Hermes will bring a Geiger counter and samples of the glassy material obtained from the first Russian atomic bomb, which was a carbon copy of the “Gadget.”
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