We live and spend our vacations on an ancient subcontinent. It has been the subject of violent geological forces for billions of years. Significantly, the record of those events is right there to see on our exposed earth surface and in the records of those who mined the resulting metallic formations. Learn more in a free lecture sponsored by the library at 2:00PM on July 19, followed by an optional field trip on July 20. Dick Thiede will present a free lecture on "The Spectacular Geology of Iron County and The Northern Highlands" on Friday, July 19 at 2:00 p.m. at the Mercer Public Library. We will journey through 4.5 billion years of our history with emphasis on the unlikely chain of events of the last 1.9 billion years that created vast mineral wealth and shaped our county and the whole subcontinent. In the lecture, we will look at rock samples which show evidence of the beginnings of multicellular life 1.9 billion years ago, the tremendous and violent volcanic activity which created precious metal deposits in our neighborhoods, and the repeated transitions from ocean to soaring mountain ranges. We will discuss millions of years of “rock cycles” which are still […]