I think you explained that really well! It felt very intuitive, which is helpful.
@stevenbaumann8692
2 ай бұрын
Thanks. I'm glad it helped
@billheinowski1807
2 ай бұрын
From a stratigraphic point of view, this all makes sense. How does it (or does it at all?) deal with surface features, such as moraines or fluvial fans? It seems like those should also be contacts, but are they really?
@stevenbaumann8692
2 ай бұрын
If there is a change in lithology, yes. But land forms are geomorphology. Sometimes on geologic maps an end moraine, even if lithologically the same, are sometimes differentiated. We use lithology over surface features because in the subsurface they aren't dividable. Plus, an end moraine is an interpretation. A case in point is this strange isolated mound near Decatur Illinois. t first everyone was like, it's a kame! Then they started to build and drill wells into it. It is till...and sand. So no one knows what it is. Just using lithology so many problems are eliminated. Now there are other forms of stratigraphy. All that being said, you can map really whatever you want. The 1970 map of the Baraboo range is a bedrock map. So the glacial stuff isn't mapped. It's so thin compared to the syncline, it won't tell you anything about the bedrock. In Illinois most are surficial maps. There the glacial stuff is mapped and end moraines are often labeled.
@billheinowski1807
2 ай бұрын
@@stevenbaumann8692 Ok - so if I'm getting this correctly, such features "could" become contacts, over geological time. In that regard, I'm thinking of things like volcanic ash layers. Or they could be wiped out entirely, by erosion or whatever other process. I live near to Jackson, MI, quite close to the "Irish Hills". I've always assumed that feature to be the moraine left over from the LGM. I also note that there it's a part of a significant topological feature that appears to run from the thumb of Michigan down well into Indiana in a NE/SW direction, and that feature doesn't show up on the geologic maps. So I assume that that's a continuation of the same line. Do you think I'm on the right track with that? It just doesn't seem to line up with maps I've seen of the LGM. Earlier glacial episodes, maybe?
@koboldgeorge2140
2 ай бұрын
Steve, as a professional geologist what do you consider the most important skills to master? I don't mean career building stuff, but actual, technical skills that help a geologist performance the best he's able to? I ask because I went to school for geology, and have felt frustrated working in the construction industry. I've been stuck at the technician level for five years, and I would like to build my skill set so I can start getting better work, but I don't know what that might entail. I've been trying to learn more soil science/geomorphology , but that hasn't seemed to help (yet). My superiors are all engineers, and they don't have much helpful advice. I'd appreciate if you could speak to these matters. Thanks for the video, and all the best to you
@stevenbaumann8692
2 ай бұрын
The best thing you can do is get your PG. or you can switch to environmental. I hate environmental. It's all rule driven.
@okboomer6201
2 ай бұрын
Google's notifications never tell me when you have posted. 😧
@stevenbaumann8692
2 ай бұрын
@@okboomer6201 I'm sorry. I almost never get them either
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