April 2025

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Seminars Labs

Current and Future Mapping at the Minnesota Geological Survey (MGS)

Seminar Lab Date: 

Mon, 2025-04-07

Seminar Lab presenter: 

Bob Tipping, Ph.D., Director, Minnesota Geological Survey

Seminar Lab Subject: 

Current and Future Mapping at the Minnesota Geological Survey (MGS)

Seminar Lab Location : 

In-person only at U of Minnesota, Keller Hall, Room 3-230

Lecture start time 7:00 PM CT.

Seminar Lab Details: 

Summary: Rather than providing a detailed history of MGS, this talk focuses on current and future work as it relates to the collection and spatial interpretation of surface and subsurface data. Mapping tasks are called out specifically because they are fundamental to the MGS mission; maps and their associated databases provide the best understanding of what we know about the distribution of Minnesota’s rock and water resources. I would like to introduce you to current data collection and mapping methods at the Survey and speculate on how these methods might change in light of improved data collection, storage and analysis.

Biography:

Minnesota Geological Survey – 2024 to present

Minnesota Department of Health – 2019 to 2024

Minnesota Geological Survey – 1989 to 2019

While at the Health Department, Bob was a hydrologist supervisor in the Source Water Protection Unit. Prior to that, he was a senior scientist at the Minnesota Geological Survey, and adjunct faculty member in the Department of Earth Sciences and the Water Resources Science program - both at the University of Minnesota. His research interests are in aquifer characterization, groundwater chemistry and groundwater-surface water interaction. Bob has a Ph.D. in Water Resources Science from the University of Minnesota, M.S. in Geology the University of Minnesota, and B.A. in History from Carleton College.

About the Minnesota Geological Survey: MGS is a unit of the Newton Horace Winchell School of Earth Sciences in the University of Minnesota. The Survey is the University outreach center for the science and technology of earth resources in Minnesota. The Survey conducts basic and applied earth science research, conveys that information to the public through publications and service activities, and promotes earth science education. Minnesota is its exclusive focus.

 
 
 
 
 
 
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Seminars Labs

Stromatolite Morphology and Diversity - How did (mostly) brainless pond scum build large, complex structures?

Seminar Lab Date: 

Mon, 2025-04-21

Seminar Lab presenter: 

Julie K. Bartley, Ph.D., Professor, Gustavus Adolphus College

Seminar Lab Subject: 

Stromatolite Morphology and Diversity - How did (mostly) brainless pond scum build large, complex structures?

Seminar Lab Location : 

In-person only at U of Minnesota, Keller Hall, Room 3-230

Lecture start time 7:00 PM CT.

Seminar Lab Details: 

Summary: Stromatolites are layered structures built by the buildup of chemical sediment under the influence of microbial communities. Hundreds of stromatolite forms have been identified, most of them in Proterozoic-aged rocks. During the Proterozoic, observed morphologies include flat-laminated, domal, columnar, branching columnar and conical, across scales from a few centimeters to tens of meters. Furthermore, the middle Proterozoic era (~1300-1000 Ma) records the highest diversity of stromatolite forms, with fewer forms recognized in older and younger successions. Although it is well known that stromatolites result from the interaction of microbial communities, detrital sediment, and carbonate precipitation, the controls on stromatolite morphology are surprisingly less well-understood.  This presentation explores how macroscopic stromatolite morphology can best be understood as lamina form expressed over time. Because stromatolite laminae represent an active growth surface at the time of formation, they therefore record the topography of the depositional surface, reflecting the interactions between the emergent stromatolite and its environment. This "lamina-upward" approach to morphological analysis provides a useful tool for explaining the complexity and diversity of stromatolite form through Earth history.

Biography: TBD

 
 
 
 
 
 
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