Texas San Angelo Mushroom Fossil

[Lone_Wolf]

My son found these in San Angelo. Anybody know what they are?

[Ludwigia]

Not easy to tell because of the matrix covering, but I would guess that these are oyster shells. Certainly not mushrooms at any rate, since they are extremely rare, these hardly ever fossilize and when they do, they don't look at all like that.

[Mark Kmiecik]

Gastropod operculi? Just guessing. 

[Lone_Wolf]

Could they be smashed bullets. I washed and dried them, and they appear to be rusty. I’ve seen a smashed slug before, and they kind of resemble this.

[Coco]

Geological forms for me, with iron.

 

Coco

[Lone_Wolf]

15 minutes ago, Coco said:

Geological forms for me, with iron.

 

Coco

What does that mean?

[Lone_Wolf]

There seems to be stems and then a smashing of something causing a ray affect in the circular shape.

[Coco]

4 minutes ago, Lone_Wolf said:

What does that mean?

I mean, they may not be fossils, but flat nodules containing iron, even if you can see some sort of streak on their surface.

 

Coco

[Lone_Wolf]

Ok

[Lone_Wolf]

Any other opinions?

[Tidgy's Dad]

Oxidised pyrite discs?

LINK

[Fossildude19]

"Pyrite suns" was my first impression.

[Fin Lover]

4 hours ago, Lone_Wolf said:

Could they be smashed bullets. I washed and dried them, and they appear to be rusty. I’ve seen a smashed slug before, and they kind of resemble this.

Bullets are typically made to not rust

[Randyw]

I agree. While there is a superficial resemblance these are NOT bullets. Bullets are made out of lead to be softer then the rifle barrel otherwise it would wear out the rifling of the barrel quickly. Sometimes with a copper jacket and sometimes with a steel core or both. But those are distinctive and none of them rust. (And somewhere in a drawer downstairs I have a few hundred spent bullets.( I used to test my loads to see how they performed against different surfaces), Mostly modern but a few from back to the civil war…

[Lone Hunter]

They look like Pyrite discs replaced by Limonite.

[DPS Ammonite]

1 hour ago, Lone Hunter said:

They look like Pyrite discs replaced by Limonite.

 

Yes, a good possibility.

 

Show us a clear close up of the side of one or two of these with a broken edge that shows us the mineral.