"Concrete pad with stainless steel rod protruding, located on the rim of a disused sand quarry. There are several of these located around the quarry. Approx 60cm on the side. Survey point?"
A: "Centering point to allow for reproducible measurements (i.e. yes – a survey marker indeed!)"
#4... What box? you see something I can't?
#2 Ive seen lots of adze, I live where they are made culturally. There are lots of different shapes depending on the purpose of it the region it was manufactured.