This is Throwback Thursday #135.  In these, we look back into the past at ESCONI specifically and Earth Science in general.  If you have any contributions, (science, pictures, stories, etc …), please send them to esconi.info@gmail.com.  Thanks!

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25 Years Ago – November 1997

• Fluorite was the topic of the General Meeting.  Jack Masters of the ISGS was the presenter.
• The Paleontology Study Group discussed the Pennsylvanian Period.
• Don Cronauer gave a presentation on fossil jewelry to the Lapidary Study Group.
• The newsletter had an article about Paul Sereno’s “Tracking Dinosaurs on Wandering Continents” at the University of Chicago.

50 Years Ago – November 1972

• The topic of the General Meeting was “The Mississippian Indians of Cahokia” by James P. Anderson, Curator of the Cahokia Mounds Museum in East St. Louis, IL
• The Mineralogy Study Group had a program on “Keokuk Geodes” by Horace Greene.
• Joe Valenta gave a program about faceting to the Lapidary Study Group.
• The Micro-Mount of the Month was “Pecos Diamonds” by Dick Ade.
• Anthropologist Dr. Louis Leakey died at age 69 in London.

70 Years Ago – November 1952

• An auction was held on November 7th, 1952.  Material was donated by ESCONI members.
• Stevens Norvell wrote an article about Illinois’ crypto-volcano for the newsletter.  The This hidden volcano is located under the Village of Des Plaines.
• Mexican Onyx can be found in a deposit in the Galena-Dubuque area near Dickeyville.  If you go seeking it, stop at the famous Dickeyville Grotto.
• Bill Kelly wrote a tip on determining “good” Limburger cheese.  Place a known “good” chunk next to a questionable piece.  If the “good” one moves away, the later piece is “bad”.