Seminar Details

Seminar Lab Date: November 9, 2026

Seminar Lab Subject: New Mapping of the Baraboo Hills Unravels a More Complex Geologic History for Southern Wisconsin (V)

Seminar Lab Presenter: Esther Stewart, Ph.D., Senior Geologist, WI Geological & Natural History Survey

Seminar Lab Location:

**Virtual Online Lecture**

Participation instructions will be e-mailed to GSM members. If you are not a member of GSM and wish to attend this free seminar online, register as follows by 8 AM CT Monday, Nov 9: Go to the Contact menu above and select “Ask GSM”. In the form that appears, enter your name and e-mail address. Enter “Nov 9 lecture” in the subject line. In the message body, please enter the city and state or country from which you will view the seminar. You will receive instructions by e-mail prior to the lecture. Check your spam folder if the instructions do not appear in your in-box at least one hour prior to the lecture.

Seminar Lab Detail:

Summary: The Baraboo Hills of southern Wisconsin preserve over a billion years of earth history spanning growth of the ancient North American continent, flooding by tropical seas, and more recent glaciation. New geologic mapping of the Baraboo Hills adds detail to the oldest, Precambrian rock units and advances our understanding of how these rocks formed. In this talk I’ll present an overview of the new geologic map and how it contributes to our understanding of Wisconsin geology.  

Biography: Esther Stewart has been a geologist with the WGNHS since 2013. Prior to joining WGNHS she worked for ExxonMobil in Houston, TX for several years. She earned her masters in geology from Idaho State University and recently completed her PhD at UW-Madison. Her research interests involve using geologic maps and stratigraphic frameworks to address practical issues in Wisconsin.