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Dallas Trinity River finds - coral and geologic?


Creek - Don

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Went down to downtown Dallas Trinity River and walked down the river banks.  Right above the Austin Chalk layer I saw couple of interesting rock formations.  I'm thinking these are ancient coral or geologic rock formations?  I found these two rocks next to each other.  They must been formed around same time.  That round stone picture has round growth ring pattern on it. 

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Thank you.  I see many big round shaped septarian nodules lying around.  Should I collect them?  

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Some do have very pretty crystal formations inside.  

As mama always said " Life is like a truckload of nodules, you never know what's inside".  At least not till you crack it open! :P

 

Here's a chunk of one that a former member sent me from the Dallas area.

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And of course, the camera can't really capture just how sparkly these actually are.

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Great.  I grabbed some more tonight before river washes them away tomorrow.  We are supposed to have T storms in Dallas tomorrow and the river rises pretty darn quick. 

Trinity river 11.JPG

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