Rock or fossil

[ADC]

Found this rock in wood upside down near a bunch of natural springs no other rocks near it middle tn need help identifying it

 

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[ADC]

Rocks or fossil

Found these 2 rock a couple of feet away from each other found on creek bed in middle tn please help to identify them

 

[A2coins]

I would guess they are just rocks worked by Mother Nature

 

[A2coins]

Welcome to tnet good to ask and learn Im always learning something on this site

 

[Red-Coat]

Welcome to the forum.

Those patterns in the first pictures could well be feeding traces from mud burrowing critters in a sediment that has lithified. It looks like what is generally referred to as mudstone or siltstone. Those kinds of traces are typically made by bivalve molluscs and, as trace fossils, we call them 'ichnofossils'.

In the second set of pictures, I see nothing unusual in the first picture other than a broken sedimentary rock with some erosion features. The latter specimen appears to be oolitic limestone, and it seems to have the end-on impression of a fossil crinoid columnal (that circular feature with a smaller circle within it). Crinoids of this type have a columnar stem terminating in a bud with feeding arms that give them a plant-like appearance... hence the popular name of 'sea-lilies', although they're marine animals loosely related to starfish and sea urchins.