MXT and Hot Rocks

[Canewrap]

Anytime I get the Hot Rocks ID, I just ignore it. That's mainly because it comes up a negative number, like -95. I saw where somebody else said that sometimes other things (possibly good targets) can register as hot rocks. My question is this, what makes the detector register it as a "hot rock"? Is it a slightly conductive signal, a broken signal, or what? Is it like when you see iron come up, pinpoint it and see how deep it is to make a decision on whether to dig or not? See, when I'm relic hunting I usually don't dig every signal unless I'm in a known camp. When I'm looking for a camp I have to cover ground and just don't have the time to dig most of my signals. However, once in a known camp area I'll dig most of my signals and even go so far as to switch over to one of my other detectors that gets a little better depth in all metal and hunt in all metal. The irony is I wish it was the other way around as my other detector weighs less than half of what the MXT does. Anyway, curious to see if anybody can explain hot rocks to me.

 

[robert roy]

Mineralization in the ground. Lift the coil up until the "Hor Rock" goes away or turn down the sensitivity.

I get this frequently at the Sports Ifeld. I will probably have to buy the 6x10 DD coil or perhaps the smaller one.

It is my understanding that the DD coils handle the mineralization much better.

Regards
Robert R

 

[Bowie]

A target that is deep can give a -95 reading. I recall a post,just cant remember where, that a -95 and a positive 95 is a closer reading than a 95 and say a 20 reading. Like a circle with -95 and 95 closing the circle up. And mineralzation does cause false signals but I think hes talking about the hot rock,-95 readings. Never know till ya dig. If you can pinpoint it and size it up that helps, of course when youre relic hunting , you are looking for more than just coin size targets. Its hard to dig those signals, but you just never know,cause something is down there and your machine is telling you something about it.
Hope someone else chimes in with their experience,
HH
John

 

[robert roy]

>>>>>>>>>>>And mineralzation does cause false signals but I think hes talking about the hot rock,-95 readings.<<<<<<<<<<<<<<
Thats correct. I have had readings in the 90's and usually it turns out to be a crushed can. Never have found a one half dollar.

Regards
Robert R