Metal detecting targets here in Florida are usually found in distinct layers, in accordance with the age of the item; older targets are usually deeper than newer targets. But not always, this is just an example. (we will use coins as the standard target, as most metal detectors are usually designed with coins in mind) Let's say targets from recently lost coins to those dropped a decade ago can usually be found in regular soil from 1" to around 5" deep. We will call this the first layer. The second layer, coins lost 25 to 50 years ago, or so, will usually be found around 6" to 8" deep, in undisturbed ground. The third layer consists of coins dropped from 75 to 200 years ago, and are found, again, in undisturbed ground, up from 9" to 15" deep or deeper.
A lot of factors can change these estimates, such as the make-up of the matrix, or in other words, the composition of the soil. Here in Florida, we have a black loamy soil in places, which can discolor older coins quite badly, to a sand-shell matrix which is easier on coins, and is more like beach detecting in certain ways. Metal detecting older coins can be very exciting, but requires you slow down a bit and listen closely for those deep signals. Sometimes nothing much more than a whisper is heard, and with experience, you'll know the target is worth digging. Slow, deep, coin hunting is an excellent way of bringing back the fun the hobby has always been known for. And since most detectorists' are impatient, they will be racing off at flank speed looking for the shallow finds, leaving the heavy silver for you! So get out there and listen closely as you slowly race about the park and get back into the exciting world of metal detecting!
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