Hey everyone, I'm new to this forum and looking forward to being of help.
Anyway, I found this rock while taking a stroll on the hills of Emilia Romagna, near Parma, in northern Italy. Looking up on a geological map what rocks compose the ground, I found out that it's predominantly argillite, which sedimented during the early Paleocene, in hemipelagic conditions. Now, the rock shows two different features: in two of the photographs you can distinguish tree-like structures, which resemble algae, but could as well turn out to be manganese oxide dendrites; in the other one instead, you can see a warm-like figure, of which I have no clue. Can you help me identify it?