Sites marked, at least where seemed important. From my file of general definitions.
Red line box (or solid filled circles) for very deep coins/treasure or artifacts of value.
Orange line box (or solid filled circles) for deeper man made gold objects or pocket gold in veins.
Blue line box (or solid filled circles) for deeper silver targets.
Green in general is a color indicator, I use for various other targets mostly archaeological (old ruins or foundations but especially those non-metallic objects such as Indian flints, glass, pottery, carved stone with treasure signs).
