2024 Spring

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Relevance of Geology
to Modern Environmental Issues

Instructor: Elizabeth (Liz) Champeon

Thursdays • 8 classes • 3/21-5/9 • 1:00-3:00 PM

Class size 5-100 students
93 seats remaining
Location: Zoom only

This course addresses the importance of site geology to modern environmental issues and installations. The course commences with a general review of the geology of Maine and the reason we need to know this in siting of modern facilities that will address the changing climate. Subsequent lectures include a definition of aquifers, with a discussion of recharge of groundwater; a presentation on the potential and existing use of geothermal (ground source) heat in regions of cold rock; a segment on local and worldwide earthquakes; the use of solar power and advances in the science; water as a source of power; wind and wind farms; and finally a presentation on the history of glaciers in Maine and other areas.

Sessions by week —

A BRIEF HISTORY OF MAINE
or Why is my Yard Full of Rocks or Clay?

This session provides a brief summary of the forces that produced the  geology and geography of the State of Maine, commencing with the continent of Pangea and proceeding to the glaciation and the effects that  it had on the landscape. The purpose is to provide a background for the  remaining sessions, which deal with the relevance of the subsurface to  the development of new sources of clean power.

AQUIFERS

Aquifers are important for the maintenance of agriculture, as sources of water for households and for drinking, and for industrial uses. Aquifers are characterized by the material in which they are sited. The utility of an aquifer is dependent
upon the ease with which water can be extracted and the rate at which that water can be replenished by precipitation. Extraction and replenishment rates are directly dependent upon the matrix of the aquifer. The processes by which aquifers can be used as resources in a sustainable manner are discussed.

GEOTHERMAL EXPLORATION
IN COLD REGIONS 

Geothermal heat is available throughout the crust of the earth, both  due to infiltration of heat from the sun and exfiltration of heat from the  interior of the earth. In cold regions like Maine, this heat can be  accessed from the subsurface. The type of material in the subsurface  affects both the transfer of heat and the amount available. Several  schools in Maine have now installed these systems, and no longer are  dependent upon fossil fuels.

EARTHQUAKES 

Siting of buildings, landfills, power plants, dams, dikes and other facilities requires knowledge of the earthquake history of the surrounding area. Not only is it necessary to know what the seismic history of a site is, but regulations require that the anticipated seismicity be predicted. Unfortunately, in this part of the world, the oral history of those who  have lived here the longest has been ignored or destroyed, so other  means of rational prediction must be found. 

SOLAR POWER 

This session examines the potential for solar power in various regions  and explains how the power is generated from the solar panels that are  sprouting in the countryside. Reference is made to ancient uses by  other civilizations. 

THE POWER  OF WATER

Water has been used to create power since at least 3000 BCE, when the Jawa Dam was constructed in Mesopotamia. Water power use exploded in the industrial age. Even when rivers and streams were not available, the power of the tides was tapped in places like Martha’s Vineyard. The remains of a tidal dam can still be seen in Jonesboro, Maine. The Quoddy project in Eastport was intended to provide power during the Roosevelt administration, but the project was terminated by World War II. New technologies are now being proposed that would use the power of the tides.

WIND POWER

Schoolhouse geography teaches that the Dutch use windmills to control the water in their below sea level homeland. In recent years, windmills  have come to be used to create power worldwide. The mechanism of  making power from windmills is discussed, as is the relevance of the  local geology to the siting of the windmills.

Exit glacier, Alaska • Courtesy of Wikipedia

GLACIERS

This segment discusses the natural processes that affect the extent of glaciers on the earth’s surface.  Processes discussed include the Milankovitch Cycle, the effect of glaciation on local landforms and variations in ocean currents and sea levels. 

Liz Champeon  is a retired geologist registered to practice in the State of Maine. She spent the majority of her working years in private practice at S. W. Cole Engineering, Inc. where she was a Senior Geologist and a member of the Board of Directors. Her more than 30 years of experience also include work for both Federal and State agencies, and she has served as adjunct faculty at Unity College. She has a BA in Geology from the University of Maine and took graduate courses at the University of Indiana and University of Maine. She has loved geology since studying dinosaurs in the fourth grade.