Re: stratigraphy in my backyard

[EMAIL PROTECTED] wrote:
> Again, an amateur request for help.
>
> Can someone steer me in the right direction to determine the age of a layer
> of limestone in a creek-cut hillside in my backyard?

http://www.ohiodnr.com/geosurvey/pdf/geologic.pdf
Generalized Geological Map of Ohio.

 If this does not answer your question,
I would call the general number of the Ohio State Geological Survey, 
tell them what where you are: (nearest small town, highway intersection 
and quadrangle topo map, if you know its name) and ask to be put through 
to someone who knows about the area. Chances are someone on staff knows 
your area. Then describe the location and the rock to them over the 
phone. They can ask appropriate questions in return.

That's part of the reason a state geological survey exists, and hey, 
you're paying their salaries! They might have a book on general Ohio 
geology you can purchase, and presumably a more detailed geological map.

> What is the best approach to solve this puzzle?  I suppose I could lug the
> rock down to the Univ of Cincinnati Geology Department...what would they ask
> me regarding the original location? anything else I should tell them?

I have no idea about the Univ of Cincinnati, but many geology professors 
have study sites elsewhere, and may only have the faintest inklings of 
local geology. I think there a good Science Museum in Cincy--my husband 
 has talked about it and their karst/cave exhibit.  They might be able 
to help, too.

> Thanks very much for understanding my enthusiasm and for looking past the
> lack of training!
No problem and happy geo information hunting!



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