salmonoid wrote:
Nice to see a post about fish and fishing, instead of some diatribe about some group that isn't the same as whoever the OP is!
I'm curious about the caption on the "volcanic" limestone stream in NC PA. AFAIK, there are no igneous rocks (save for glacial cobble) in NC PA. It's all sedimentary, as is most of western PA (really most of PA, except for southern southcentral-PA [i.e. Adams county] and southeastern PA). Is that a play on words?
I was wondering about that too. Where did that reference come from about volcanic stuff?
I'm also pretty sure there are no volcanic rocks in northcentral PA. The underlying rocks are sedimentary.
If the reference is to spring creeks in northern Potter Country, such as Oswayo Creek and Mill Creek, those are "glacial till spring creeks."
The glaciers moved south across NY state and scraped off a lot of material, including limestone, and deposited it in northern Potter County.
The rain flows through the glacial till aquifer, which creates high alkalinity, and also provides better base flow than freestone streams.
I really liked the stream photos. They remind of the old school slide film days, which I miss. They have a similar look.
And low gradient spring creeks and the surrounding landscape have a beautiful and special appearance. At least the ones that haven't been wrecked.
Sal, if you haven't gone to the Driftless Area yet, you should. Low gradient limestone spring creeks all over the place. Hundreds of miles of them.