They are a combination of brachiopod fossils and rudist spicules from sponges or corals and "Sole marks". Sole marks are preserved energy features from moving water or drying mud. I think we see some dessication casts (thats a type of sole mark) or else they are cross cutting mini veins of sediment. The linears are slightly different material than the bedrock sopecimen.
As evolutions said, you should put a coin or a small ruler in the picture so we hqve a sense of scale
Were these from Gros Morne or near Argentia??