A geologist’s travelogue of Illinois based on Ray’s popular book Geology Underfoot in Illinois. Unjustly branded as a flat and boring place, Illinois is in fact full of scenic and scientifically significant locales that teach us much about our planet’s history.


A customized talk geared specifically to your county or region. It reveals dramatic evidence of a wide slice of earth history—from local bedrock formed millions of years ago to some of the Midwest’s most significant Ice Age landmarks. Also, the compelling story of how your locale’s modern landscape and human settlement patterns have been shaped by the massive geologic forces of changing climate, glaciers, invading seas, and shifting continents.


How does an understanding of the Earth’s immense history – which includes sultry “greenhouse,” frigid “icehouse,” and high-sea-level “water world” phases – shed light on our understanding of modern Global Warming? And to what extent is our one species changing the climate in the twenty-first century?


A trip to the Moon and other planets, featuring the evolution and landscapes of our solar system, seen from a planetary-science perspective. This ever-popular talk includes breathtaking images from US and European space missions.


Discover the fascinating connections between the Badger State’s geologic history and the plant communities that have been its backdrop for over 400 million years. It’s a tale of “Deep Time,” in which we explore new scientific findings that illustrate how Wisconsin’s prairies, wetlands, and forests have been active agents in helping to shape and define the landscapes they inhabit.


America’s “debate” about Global Warming contains too much political rhetoric and posturing and too little attention to the scientific findings. What exactly do we know — and what can we actually predict — about the Earth’s changing climate? And what, if anything, can we do about it?


The past revealed in our fossil record! The geologic and biologic history of Illinois, as revealed by its fossils — from marine invertebrates of the Ordovician sea of half a billion years ago, to the luxuriant, equatorial coal swamps of the Pennsylvanian period and to the massive “megafauna” mammals of the modern Ice Age.


How Illinois’ living landscape came to be! Twenty thousand years ago, the Upper Midwest was a forbidding ice desert. This talk explores how, at the end of that glaciation, the Prairie State’s landscapes, soils, and plant communities evolved into their present forms. An overview of significant pre-Ice Age events is also included.


The interplay between architecture and stone, soils, and sediments is an intimate one, and Chicagoland is the perfect place to explore this fascinating connection. This presentation includes a look at the ornamental stone used on the Windy City’s most famous landmarks, and also covers the imposing engineering challenges of anchoring skyscrapers in the city’s treacherous lakebed sediments.  


A survey of the magnificent and magical littoral lands of southern Lake Michigan. Stretching from Michigan’s Warren Dunes through Indiana Dunes country to Ill­inois Beach State Park and southeastern Wisconsin, this high-energy environment – the crossroads of waves and wind and sand – has a compelling geologic history. It harbors unique plant communities and rare ecosystems with roots deep in the Pleistocene ice age.


The past revealed in our fossil record! The geologic and biologic history of Wisconsin, as revealed by its fossils — from marine invertebrates of the Ordovician sea of half a billion years ago to the massive “megafauna” mammals of the modern Ice Age.


How modern geology has revolutionized our view of our planet: a look at both catastrophic events and slow but powerful forces that shape our world’s landscape, interior, and atmosphere. This talk includes plate tectonics theory, earthquakes, tsunamis, climate change, and history-changing asteroid impacts.


Explore the fascinating and surprisingly exotic legacy of stone, soils, and sediments on display to the curious mind and inquisitive eye in Wisconsin’s historically prominent lakeport cities of Kenosha and Racine. It’s a tale of great human artistry and deep geologic time – with Ice Age sediments turned to gleaming ornamental terra cotta, and stunning ornamental facing stone forged in the Earth’s interior three and a half billion years ago. Even the famous Cream City brickwork so evident in the region’s architecture tells a compelling story of the interconnections between geology, chemistry, and human building practices.


The Upper Midwest boasts a vast assortment of indigenous wildflower and woody-plants species. Learn more about these noble natives – and how you can incorporate many of them in your own garden!


For the lover of indoor plants, there is no more addictive pleasure than growing tropical orchids. Long unfairly stigmatized as being difficult to grow in the home, these representatives of the largest plant family on Earth are in fact often surprisingly easy to maintain and flower. This talk describes the most reliable selections and provides plenty of time-tested cultural tips. Time is reserved in this talk for an Orchid Workshop – and participants can bring in their own plants for identification and problem diagnosis.



American Society of Civil Engineers

Barrington Country House Garden Club

Burpee Museum, Rockford

Chicago Rocks and Minerals Society

Des Plaines Garden Club

Dixon Park District

Earth Science Club of Illinois (ESCONI)

Emily Oaks Nature Center

Field and Flower Club, Barrington

Friends of Indian Boundary Prairies

Forest Park Nature Center, Peoria

Garden Clubs of Illinois

Garden Club of Mount Prospect

Gardeners of the North Shore

Garfield Farm Museum

Gethsemane Garden Center, Chicago

Gurnee Park District

Hanwakan Foundation

Homewood Historical Society

Hyde Park Historical Society, Chicago

Illinois Institute of Technology

Illinois Wildflower Society

Jo Daviess Conservation Foundation

Jo Daviess County Historical Society, Illinois

Kane County Forest Preserve District

Kenosha Public Museum

Lake County Chapter, Audubon Society

Lake County Gem and Mineral Society

Lake-to-Prairie Chapter, Wild Ones

Lake Forest Open Lands Association

Library Administrators Conference of Northeastern Illinois (LACONI)

Little White School Museum, Oswego

Lizzadro Museum

Men’s Society, Congregational Church, Western Springs 

Midwest Museum of Natural History

National Council of Garden Clubs

Natural History Society of Barrington

North Shore Senior Center

Northbrook Historical Society

Northwest Cook County Chapter, Sierra Club

Northwest Illinois Chapter, Audubon Society


Park Ridge Garden Club

Peggy Notebaert Nature Museum

Prairie Woods Audubon Society Chapter

Peoria Academy of Science

Plum Creek Nature Center – Will County Forest Preserve District

Prairie Woods Chapter, Audubon Society

Prairieview Education Center – McHenry County Conservation District

Racine Geological Society

Ryerson Conservation Area – Lake County Forest Preserves

Ryerson Conservation Area – Lake County Forest Preserves

Rock River Valley Chapter, Wild Ones

Root River Chapter, Wild Ones

Severson Dells Nature Center

Sinnissippi Chapter, Audubon Society

Skokie/Lincolnwood Women’s Club

Spring Valley Nature Center

St. Charles Park District

Starved Rock State Park

Tekawitha Woods Nature Center

The Morton Arboretum

The Nature Conservancy

The Nature Institute

Triton College

Will County Chapter, Audubon Society

Wilmette Historical Museum

Winnetka Community House

Women’s Society, Congregational Church, Western Springs 







Bedford Park


Calumet City


Chicago Ridge

Coal City

Crystal Lake



Des Plaines

Downers Grove


Ela Area, Lake Zurich



Forest Park

Fremont Public Library, Mundelein

Gail Borden Library, Elgin


Glen Ellyn


Higland Park

Homer Township

Indian Prairie, Darien

Indian Trails

La Grange Park

Lake Villa





Morris Area

Morton Grove



North Riverside

Oak Lawn

Orland Park




Prospect Heights

River Forest



South Holland


Thomas Ford Library, Western Springs

Vernon Area

Warren-Newport, Gurnee