In this episode we continue into the next logical topic, absolute dating, which is done via measurement of radioactive parent and daughter isotopes. Thus we move from the 19th century and classical physics into yet another way in which 20th century physics has revolutionized science.
Paul gives a rundown, with many apologies for the exact data of isotope numbers and half-life lengths he has managed to forget, of the theory of radioactive decay. Bill, our proxy for the man on the street, starts us off with a common notion of half-life. From there we cover some of the basics and most commonly used isotopic systems: uranium-lead, thorium-lead, a discussion of why carbon 14 is so seldom used in geology, potassium-argon, and a note that more systems are always being brought into use. We discuss the distinct types of rocks that are best used for radiometric dating and how the relative dating methods have to be used in an interwoven system with radiometric dating in order to assemble the whole system of geochronology that we use today.
We end the podcast with a discussion of how science is the very opposite of a conspiracy theory or a political campaign. The geologic dating systems need interlocking data, and they also benefit from it. In such a system, contradictions do spring up--one study doing biostratigraphy might conflict with another using zircons. What science does is not to sweep that under the rug...instead we throw resources and graduate students at it until we get a resolution to the conflict.
(Zircon photo credit Harald Schillhammer via mindat.org. Note the pink and brown coloration...brown zircon is commonly that color due to radiation damage from the uranium and thorium it contains.)
Ep 147 - Daniel Shields on Nature and Nature’s God
Ep 146 - TSSM Takes a Break
Ep 145 - Faith Journeys That Make a World of Difference: Paul Seungoh Chung
Ep 144 - Matthew & Chantal of 5th Place on Emotional Fitness
Ep 143 - Scott Gazzoli and Spirit over Show
Ep 142 - Matt Swaim: Symbols and Substance, in Faith and Online
Ep 141 - Louis Albarran and the Faith of Real People
Bonus - Society of Catholic Scientists 2022
Ep 140 - Chris Bell – Views from a Pro-Life Lifetime
Ep 139 - Pondering Big Issues Powered by Uranium
Ep 138 - Darcia Narvaez, Insights About Humanity for a Suffering World
Ep 137 - Francis Bacon and the New Organon
Ep 136 - Deacon Harold: Life Rich in Reality, Reality Rich in Life
Ep 135 - A Visit to the Universe of Fr. Robert Spitzer, SJ
Ep 134 - Bill on Journalism and Truth with Franciscan Dave
Cybersecurity Bonus Episode with Matthew Cloud
Episode 133 - Cybersecurity Education as a Vocation with Matthew Cloud
Ep 132 – The Long Road to Mathematical Physics
Ep 131 - Jordan Wales and the Moral Theology of AI
Episode 130 - Natasha Toghramadjian’s Research into Earth-Shaking Impacts
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