Arkansas and NW Missouri

[MSirmon]

Took a road trip today and although it was only 28 degrees found a few interesting items. Any help identifying, even a rough direction to look would be appreciated. 

 

1 and 2 were found at Beaver Lake in Arkansas. If I read the map correctly, which is always iffy, they should be Ordovician in age. Wondering if I should break into the squarish looking piece (#1) to see what it contains. 

 

3 and 4 were found just across the Missouri line from Grove Oklahoma. I believe the area is Late Pennsylvanian. The limestone (3) looks like it contains traces of water worn chrinoids(?).

 

#4 May just be a water worn rock but maybe a man made fetish? The hole goes all the way through and would make a great hanging piece. 

 

 

 

 

[ynot]

Not sure about 1 or 3, but 2 and 4 look like chert nodules (not seeing any thing fossil in them).

1 may be a chert nodule in matrix, also does not look fossil.

[Bronzviking]

3A and 3B look like bivalve external molds showing the ribs of the shell.

[Tidgy's Dad]

Well, i'm probably miles off, but these look like ammonite impressions to me. 

3A and 3B

[Innocentx]

2 minutes ago, Tidgy's Dad said:

Well, i'm probably miles off, but these look like ammonite impressions to me. 

3A and 3B

The curve makes this likely.