“The Most Diverse Geology on Earth? NW Wyoming /Jackson Hole”
Presentation: “The Most Diverse Geology on Earth? NW Wyoming / Jackson Hole” by John Hebberger Jr.
October 6th (Tuesday), 6 p.m., Social half-hour; please join us from 5:30-6:00 to enjoy free soft drinks and appetizers before our talk begins!
Live at the Teton County Library & Via Zoom (online)
RAFFLE AT 6PM!
The Prize: MALACHITE SLAB
Malachite is a copper carbonate hydroxide mineral, with the formula Cu₂CO₃₂. This opaque, green-banded mineral crystallizes in fractures and underground spaces, where the water table and hydrothermal fluids provide the means for chemical
precipitation. Its green color does not fade over time or when exposed to light.
Raffle rules:
- Must be present to win.
- All attendees will receive one ticket.
- Drawing will be at 6:00 pm in the library auditorium.
Sunset over the Teton Range
Presentation: “The Most Diverse Geology on Earth? NW Wyoming / Jackson Hole” by John Hebberger Jr.
The title for this talk is a bit of a challenge to the audience, as well as recognition of the long list of geologic events and processes evident in NW Wyoming. Through more than 2.8 by of time many geologic events and processes have combined to create the dramatic scenery of the area. This talk will take you through those events and processes. They include:
1. The earliest recognized continent – continent plate collision.
2. Evidence of the break-up of the Rodinia supercontinent.
3. The “great(est)” unconformity, spanning >2by of time.
4. Continental drift from equatorial seas to northern mid-latitudes.
5. A half billion years of sedimentation, while at or near to sea level.
6. Late Mesozoic – early Cenozoic arrival of the Thrust Belt.
7. Late Mesozoic – early Cenozoic development of basement cored Foreland Uplifts and their adjacent deep basins.
8. Major Cenozoic volcanism that formed the present day Absaroka Range.
9. Yellowstone volcanism, moving through the craton and arriving at today’s location in Yellowstone National Park.
10. Major regional late Miocene uplift and resultant ongoing erosion.
11. Latest Miocene and early Pliocene arrival of Basin & Range extension into western Wyoming.
12. Repeated Pleistocene glaciation, both Alpine and quasi-continental (the latter from the Yellowstone uplift).
All these events & processes are evident to the geologist’s eye, and have resulted in this dramatic scenery, as well as the flora, and fauna of the area – and the national parks and forests that are prominent socio-political features of NW Wyoming.
Topic: “The Most Diverse Geology on Earth? NW Wyoming / Jackson Hole”
Time: Tuesday, October 6th, 2026, 06:00 PM Mountain Time (US and Canada)
Join Zoom Meeting
https://us02web.zoom.us/j/4555651818?pwd=U09ObDNZOEIyZmRtMEtsdUowQnJqdz09
Meeting ID: 455 565 1818
Passcode: 576063