Is it likely that the low grade metamorphics sandwiched between higher grade metamorphics in the Inner Piedmont of Alabama are the result of two episodes of hydrothermic flow through different levels (where the higher grades are?)
I'm not at all familiar with the geology there, so extra detail is welcome.
2007-10-27 15:02:51 · 3 answers · asked by Now and Then Comes a Thought 6 in Science & Mathematics ➔ Earth Sciences & Geology
Your answer to the "bizarre geology" question is what made me ponder this question.
2007-10-28 11:32:03 · update #1
Here are some interesting sites I found for your question pertaining to Alabama. Hope this helps
http://www.angelfire.com/extreme4/lkrwork/x403.htm
http://home.entouch.net/dmd/appalach1.htm (best site)
http://home.entouch.net/dmd/unconformity.htm
http://www.cagenweb.com/quarries/states/alabama.html
2007-10-27 20:21:43 · answer #1 · answered by Kristenite’s Back! 7 · 2⤊ 0⤋
That's one thought. Read the Hatcher Merchat 2006 paper on channelized flow. There are a lot of ideas about this. There are all sorts of problems going on in the Inner Piedmont of the Appalachians in general, and Alabama is no exception.
There's a just a lot of quirky stuff going on with the Towaliga and the Brevard zone to lend credence to stuff being brought down from NE Georgia, like the Dadeville Complex and the Jacksons Gap group. Lots of shear zones and some normal faulting evidence where shear faulting was thought.
Read M.G. Steltenpohl (my adviser), Mike Higgins, Bentley and Neathery, R.D. Hatcher, Jonathan Grimes, there's a bunch. Everyone has an idea. I'm trying to put the Dadeville back in Georgia.
Its curious you ask this after we posted answers in the bizarre geology question.
2007-10-27 15:24:32 · answer #2 · answered by Lady Geologist 7 · 2⤊ 1⤋
trying to help you with your qs sense you helped me with 2 of mine but i have no idea what this means srry
2007-10-27 15:18:35 · answer #3 · answered by Anonymous · 0⤊ 2⤋