Baleshare conundrum

As the sand shifts on the beach, these peaty deposits appear. Often they have a series of parallel lines cut into them, very often perpendicular to the shore line.
Having shown thme to a few people who know better than me about things archaeological, they are dismissed as natural or recent.
Looking carefully today, some of these deposits have parallel lines in two different dircetions. You can make it out here in this image - just.
I do wonder if in faxt they represent old plough marks, probalby going right back to the Iron Age, an age of which there are several nearby structures.
It is difficult to see how that are natural and if created recently by tractors gathering kelp, then they seem to be too neat and tidy.