At some point further up, the rubble turned into large rocks, which the mountain obviously consists of and which have gradually broken off and arrive at the bottom as rubble. Perhaps the Attavyros was once 3000m 😉
In any case, the rocks here are so big that you can climb some of them. Plus sometimes very steep and also steeper, so that you always have to be careful not to slip off.
Here it took me the longest to find a safe way and to climb up. To be honest, that was also the point where I had to pause for a moment and wonder whether I should really break off. Only, as I said, very steep downwards with scree and "slopes".