curious trace material

[franster]

Hi Folks,

I am taking the opportunity of terrible weather here to sort out some of my fossil finds from last year. This set of specimens comes from the Middle Eocene Allenby formation on Allenby Road near Princeton British Columbia Canada. The main structures I see are the shiny patches of material that resemble the slickinside we see in our concretions here on Vancouver Island. The material does not appear to have much depth. The rock is a cherty mudstone. Patches of sheet like algae? Mud striations?

[Rockwood]

Sure looks like some sort of spreading movement was involved.

Full disclosure: I've been spreading drywall mud all day.

[Wrangellian]

Looks like slickensides to me, but I'm really not confident.

[jpc]

Looks like slickensides to me as well... And I have not been spreading drywall mud.

[franster]

Thanks folks, I suspected slickenside, so it gets added to the garden!