Skip to content
Geological Society of Minnesota

Geological Society

of Minnesota

  • Welcome Page
  • Road Markers
  • MembersExpand
    • Seminars and LabsExpand
      • Seminar/Lab Calendar
      • Current Year Schedule
      • All Seminars and Labs
      • Directions to Seminars and Labs
    • Fields TripsExpand
      • Field Trip Calendar
      • Help Field Trip Signup
      • Upcoming Field Trip
      • Field Trips Signup
      • Submit Field Trip Suggestions
      • Past Field Trips
      • Waiver of Liability
      • Waiver of Liability PDF
    • CalendarsExpand
      • Seminar/Lab Calendar
      • Field Trip Calendar
    • Member InformationExpand
      • Print Single Page Membership Form
      • Enter in your membership form, then print
      • Membership Application / Renewal / Donations via Credit Card
      • Membership Help Document
    • Media LibraryExpand
      • Media Library Order/Display
      • Help Using Media Library
      • Suggested Geology YouTube Videos
    • NewslettersExpand
      • Display Newsletters
      • NLs from the MN Geological SurveyExpand
        • Newsletter JPG Large
        • Newsletter JPG Small
      • Contributing to the Newsletter
  • Link
  • OutreachExpand
    • For Teacher
    • State FairExpand
      • State Fair Booth Rock Specimens List
  • AboutExpand
    • History
    • BoardExpand
      • Display Board Minutes
      • Board Information
      • GSM presidents
    • Organization InformationExpand
      • Articles of Incorporation
      • By_Laws
    • Mission
    • Administrator LoginExpand
      • Administrator Login Help
    • Facebook
  • ContactExpand
    • Ask GSM
    • Ask ChatGPT a geology question
    • GSM USPS mailing address
  • Display PostsExpand
    • Display Blog Posts List
    • Display Blog Posts by Category
    • Help Viewing Blog Posts
Geological Society of Minnesota
Facebook Facebook

Geological Society of Minnesota

The Geological Society of Minnesota is a nonprofit educational organization in operation since 1938. Our mission has been to promote public interest and to supply educational support in the geological sciences.

Welcome Page
Member Information

Upcoming GSM Public Events

  • Field Trips
  • Road Markers
  • Banquet
  • Lecture
  • Lecture
  • Lecture
Next seminar(s) or Lab
November 4, 2026
The Hope Diamond and Other Stories from the Smithsonian Gem & Mineral Collection
November 9, 2026
New Mapping of the Baraboo Hills Unravels a More Complex Geologic History for Southern Wisconsin (V)
November 23, 2026
Mars Demystified: What Everyone Should Know
No Entries Found
Upcoming scheduled Board meetings(s):
November Board Meeting

 Monday, November 16, 2026 from to

Members


  • Member Information
  • – Seminars and labs
  • Seminar/Lab Calendar
  • Current Year Schedule
  • All Seminar and Lab
  • Direction to Seminars and Labs
  • Field Trips
  • Field Trip Calendar
  • Upcoming Field Trips
  • Past Field Trips
  • Waiver of Liability
  • Waiver of Liability PDF
  • Video Library
  • GSM Video Library Display
  • Suggested YouTube Videos
  • GSM T Shirts and Caps
  • Add Clothing Item
  • Newsletter
  • Display Newsletters
  • Contribute to Newsletters
  • Board
  • Display Board Minutes
  • Board Information
  • Presidents of the GSM

Link/Outreach/About


  • Link
  • Outreach
  • For Teacher
  • State Fair
  • State Fair Booth Rock Specimens List
  • About
  • History
  • Organization Information
  • Articles of Incorporation
  • By Laws
  • Mission
  • Administrator Login

Contact/Display Post/ Road Markers


  • Contact
  • Ask GSM
  • Ask ChatGPT a geology question
  • GSM USPS Mailing Address
  • Post/Blog
  • Display Post
  • Display Post List
  • Road Markers
Facebook X Instagram

© 2026 Geological Society of Minnesota - WordPress Theme by Kadence WP

  • Welcome Page
  • Road Markers
  • Members
    • Seminars and Labs
      • Seminar/Lab Calendar
      • Current Year Schedule
      • All Seminars and Labs
      • Directions to Seminars and Labs
    • Fields Trips
      • Field Trip Calendar
      • Help Field Trip Signup
      • Upcoming Field Trip
      • Field Trips Signup
      • Submit Field Trip Suggestions
      • Past Field Trips
      • Waiver of Liability
      • Waiver of Liability PDF
    • Calendars
      • Seminar/Lab Calendar
      • Field Trip Calendar
    • Member Information
      • Print Single Page Membership Form
      • Enter in your membership form, then print
      • Membership Application / Renewal / Donations via Credit Card
      • Membership Help Document
    • Media Library
      • Media Library Order/Display
      • Help Using Media Library
      • Suggested Geology YouTube Videos
    • Newsletters
      • Display Newsletters
      • NLs from the MN Geological Survey
        • Newsletter JPG Large
        • Newsletter JPG Small
      • Contributing to the Newsletter
  • Link
  • Outreach
    • For Teacher
    • State Fair
      • State Fair Booth Rock Specimens List
  • About
    • History
    • Board
      • Display Board Minutes
      • Board Information
      • GSM presidents
    • Organization Information
      • Articles of Incorporation
      • By_Laws
    • Mission
    • Administrator Login
      • Administrator Login Help
    • Facebook
  • Contact
    • Ask GSM
    • Ask ChatGPT a geology question
    • GSM USPS mailing address
  • Display Posts
    • Display Blog Posts List
    • Display Blog Posts by Category
    • Help Viewing Blog Posts

November 4, 2026

×

Seminar Details

Seminar Lab Date: November 4, 2026
Seminar Lab Subject: The Hope Diamond and Other Stories from the Smithsonian Gem & Mineral Collection
Seminar Lab Presenter: Jeffrey Post, Ph.D., Curator of Gems & Minerals (emeritus), Smithsonian National Museum of Natural History

Seminar Lab Location:

In-person only at University of Minnesota, Tate Hall, Room B20

Time: 6:00 PM CT (note earlier time)

Seminar Lab Detail:

Summary: The Hope Diamond is one of the most famous gemstones in the world. It is familiar to most people because of its fascinating human history that includes kings and thieves and perhaps a curse or two, but it is also a rare blue diamond, the largest and finest of its kind known. Despite its long history in the public eye, the diamond still prompts many questions. The United States National Gem Collection at the Smithsonian Institution is also well-known for its many other world-class gems and jewelry pieces. Curator-emeritus, Jeffrey Post, will explore the science and lore behind some of the famous and lesser-known gems in the National Collection.

Biography: Dr. Jeffrey E. Post received Bachelor of Science degrees in geology and chemistry from the University of Wisconsin – Platteville, and his Ph.D. in geochemistry from Arizona State University. Prior to joining the Department of Mineral Sciences at the Smithsonian Institution’s Museum of Natural History in 1984, he was a Postdoctoral Research Fellow at Harvard University. He was Chairman of the Department of Mineral Sciences 1989-1994 and 2014-2019, and from 1991 to 2023 served as Curator-in-Charge of the National Gem and Mineral Collection. Dr. Post was the lead Curator for the Janet Annenberg Hooker Hall of Geology, Gems and Minerals that opened in 1997. In May 2023 he was appointed research curator, emeritus. He is on the Board of Governors for the Gemological Institute of America.

He has published more than 150 scientific articles and is author of The National Gem Collection, and the recently published: The Smithsonian National Gem Collection—Unearthed: Surprising Stories Behind the Jewels.

November 9, 2026

×

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.

November 23, 2026

×

Seminar Details

Seminar Lab Date: November 23, 2026
Seminar Lab Subject: Mars Demystified: What Everyone Should Know
Seminar Lab Presenter: Protiti Roy, Ph.D. Candidate, Graduate Fellow, University of Iowa

Seminar Lab Location:

In-person only at University of Minnesota, Tate Hall, Room B20

Lecture start time 7:00 PM CT

Seminar Lab Detail:

Summary & biography TBA

November Board Meeting

×
Board Meeting Title November Board Meeting
Board Meeting Date Monday, November 16, 2026 from to
Location

TBA

Board Meeting Agenda