Possible fossil fruit from the Raging River Formation

[Diatryma]

I need some help identifying this plant fossil. It appears to be a fruit of some sort, as it has a prominent reddish stain that surrounds the entire fossil. This specimen was found in the upper strata of the Raging River Formation in King County, Washington state. While the Raging River Formation is primarily noted as a marine fossil facies, the report by J.D. Vine, (1969), lists "woody fragments of trees and leaves were found associated with the marine fossils, but specific species could not be identified." This specimen was found at site #648 as listed in the above report.

 

Edited November 23, 2021 by Diatryma
Additional information added.

[Fossildude19]

This looks to me like a carbonized piece of plant in some sort of siderite concretion., perhaps.

Not seeing a fruit, however.

 

More pictures would be helpful, preferably with the ruler on the side or in the background.

Pictures of all sides of the item would help as well.

 

[Diatryma]

While there are concretions in this formation, this is not a concretion. The surrounding halo could possibly be siderite, but even at 30x magnification, I could not identify the mineral present. In addition, I have more than 40 concretions from this formation, none of which display this type of coloration. The coloration is confined to the bedding plane and does not permeate the surrounding sandstone. I wonder if this could be a molecular biosignature.

 

[Auspex]

I see what you are saying, but I think what you have is some iron that accreted in the sandstone, and has weathered to this appearance.