✅ SOLVED What would cause this type of rock formation?

[creskol]

 

[Red-Coat]

Neat. Those look like they may be a particular kind of turbidite deposit sometimes seen in sedimentary rocks known generically as "sole marks" and more specifically as "flute marks" or "flute casts".

Sole Marks

Educational webpage detailing sole marks—sedimentary structures formed by erosion and infill that indicate stratigraphic up and paleoflow direction—featuring descriptions, modern and ancient examples, and teaching resources within a geoscience pedagogy context.

serc.carleton.edu

 

[DownEast_Detecting]

cool!

 

[creskol]

Thanks a bunch Red-Coat!!