The glacial grooves at Kelly's Island are pretty impressive. It's obvious they were formed by an immense force scraping rocks and boulders along the exposed limestone. The force was provided by the slow motion flow of the laurentide ice sheet. For many years after the class, I had an opinion that the glacier ice was "miles thick" and uniformly deep. I thought it looked something like this painting at the boundary, but this concept was a "scientific" version of folklore.
In my hometown area where there is exposed bedrock there are no glacial grooves. Also there's significant accumulation of glacial till here; it's tens to hundreds of feet thick (in old river valleys). The mental model of miles-thick ice scouring the bedrock here doesn't jibe with that.Images of the present day Greenland ice sheet shows it tapers down significantly at the edges, so maybe it's ~20 feet thick, plus it's all dirty and gray and it rides on a layer of rocks and ground up rock powder. Also it's shape and thickness seems to be significantly affected by underlying bedrock and land elevation.
This photo, below, from Greenland of the Isunnguata Sermia glacier is probably a good approximation for what the glacial times were like here in my neighborhood, which is on a terminal moraine from 14,000 years ago. Maybe there was more vegetation here at the time, like hemlock forests and grasslands since we're much farther south than Greenland.
So if I were living 14,000 years ago, the view from my current property would have been something like that. Maybe tens of feet of ice off to the north stretching on for endless miles into Canada. The southern side of the glacier was probably filled with streams and holes and lakes in the summer season.
A bunch of glacial till would be stacked up all over the place with new grass, weeds, and trees quickly taking over, and there would be lakes and rivers everywhere supplied by melt water. In fact, there was a lake just to the north of my property which eventually emptied out via what's currently Big Creek.
Anyway, I think most of the mind-models people have are low fidelity like my 8th grade glacier model. The folklore mind model of Ohio ice age geology is a pretty interesting one to think about. It shares some common traits with kid lore I learned in the late 1970s/early 1980s in Chardon, Ohio.
There's an "official"/technical and highly detailed version of Ohio ice age geology which is constantly updated by PhD students and geology researchers, plus a slow, steady stream of information comes from water well drilling companies into ODNR databases. This technical/detailed information ends up in maps, reports, whitepapers, etc... Some geology professors in Ohio will understand and have a significant amount of that info at their fingertips.
A popularized, shortened version ends up in text books. Middle school teachers will grasp some subsection of facts, and jumble and mix up other concepts as they convey that info to students. It turns into a narrative that borrows core elements from fictional stories, and get exaggerated and peppered with interesting concepts like "miles thick ice", which is way more interesting than a pile of dirty snow that ebbs and flows like a super slow motion waves on the beach.






