Found this iron object in the sea of trash. It has one half Circle edge, followed by a hollow tube, and a pin sticking out the end. It doesn't exactly match a broken pick axe, but I don't know what it could be.
Nice find, I like the shpe of it. From what I see in Kuger's links I see it seems to be a shingle hatchet (or carpenter's hatchet), and as such likely has a nail puller notch in the bottom of the blade. Clean it up and add it to the Axe Showroom!