Well thanks for getting the Oregon section started with some great pictures of your local rock finds, GaryS! I hope when your rockway project is finished you will continue to explore. Oregon has many treasures to be found.
The fossil rock with a hole in the middle looks like it might be a vertebra from a dolphin or shark. And I would "guess" the last piece is Petrified wood.

The first rock is an aphanitic rock that had a crack or fissure that became infilled with a more weather resistent material like silica.  It looks to be epidotized giving it a slight green color.  Unfortunately pictures cannot possibly convey as much information as if I could hold the rock in my hand.  But more information can get you a lot closer.  For example getting the mohs hardness value of the rock can be helpful.  I would also assume that the infilled crack material will be harder than the surrounding matrix.

I don't think the 2nd one is a vertebra, I don't see any indication of concentric rings from growth. Instead, I get more of a small fishing net weight or spindle whorl impression. There have been a lot of artifacts found in Southern Oregon. But I could be wrong.