hair-like strands in rock

[anonaddict]

location: aarhus, denmark
found: loose beach rock
units: metric
date: -

notes: no idea what this could be but it looks different from normal rocks with stripes
image:

 

[Rockwood]

Hairlike structures are often identified as the rooting structures of a sponge. 

[mighty micraster]

Sponges on flint wouldnt be that colour i dont think.

[FranzBernhard]

Are these hairlike or planar features?
Franz Bernhard

[Rockwood]

4 hours ago, FranzBernhard said:

Are these hairlike or planar features?
Franz Bernhard

Good question, but how would planar structures form in this configuration? 

[TqB]

4 hours ago, FranzBernhard said:

Are these hairlike or planar features?
Franz Bernhard

Looks planar, maybe microbedded dark silt, judging especially from the last photo.

Edited 21 hours ago by TqB

[FranzBernhard]

55 minutes ago, Rockwood said:

Good question, but how would planar structures form in this configuration?

@anonaddict will hopefully tell us .

Franz Bernhard

[anonaddict]

2 hours ago, FranzBernhard said:

@anonaddict will hopefully tell us .

Franz Bernhard

of course.

 

it appears to be planar, however it's difficult to tell. it doesn't appear on the other side of the rock at all however looking at one of the holes it does appear to extend at least a little bit into the rock , but not more than ~2 cm at most. I've tried scraping it off at least 10 times because it looks so much like something like wet piece of hair or seaweed that dried on the rock and sticks to it

 

ive attached some additional photos where you can just make out that it is planar

 

 

[Rockwood]

The top photo in this set Looks a little like an external mold of a gastropod. Could it be a trace made by one twisting itself into sediment?

[anonaddict]

7 minutes ago, Rockwood said:

The top photo in this set Looks a little like an external mold of a gastropod. Could it be a trace made by one twisting itself into sediment?

i suppose it's possible? im in no position to comment on that, i dont know enough about how the rocks form, nor do i know anything about trace fossils beside being capable of identifying a very limited number of trace fossils like these

[FranzBernhard]

Thanks for the additional pics and the description, @anonaddict.

I have no idea what this could be!

Franz Bernhard

Edited 17 hours ago by FranzBernhard

[Rockwood]

1 hour ago, anonaddict said:

i dont know enough about how the rocks form, nor do i know anything about trace fossils beside being capable of identifying a very limited number of trace fossils like these

Ophiomorpha ?

[anonaddict]

14 minutes ago, Rockwood said:

Ophiomorpha ?

correct