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Hot Rocks?

  • Thread starter Thread starter Felinepeachy
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Felinepeachy

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Okay people, I just got my new MXT and I have been reading all the stuff etc. Just below the disply screen is a little chart. On the chart there is something on there that says "Hot Rock" What the heck IS a hot rock? My first thought was what law enforcement calls a stolen gem stone. "Hot Rock" But then I thought, no, it can't be. Theres no way this thing could know what was stolen and what wasn't. LOL So, What is it? ::)
 

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An oversimplified description is: a rock with mineralization such that it could trick a lesser detector into thinking you'd found something metal.
 

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my description would be a rock with a high metal content such as ore
 

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NHbenz said:
An oversimplified description is: a rock with mineralization such that it could trick a lesser detector into thinking you'd found something metal.
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That's my boy, Benny! He doesn't have that protruding forehead for nothing.....there's a extra helping of brains in there! ;D


Caveman_types.gif​
 

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Not sure about the "lesser detector" thing. I've found some hot rocks that rang in the "must dig VDI range" (50-80) with a signagraph to match on my DFX. A good "hot rock" will fool pretty much everything out there as far as I know.

Maybe we need a thread somewhere to list pictures of hot rocks along with the information your detector gives you. If you have it in your hand, you dug it for some reason.

Daryl
 

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Oh yea...hot rocks.....I'll get back on track now. When I used my first detector, a less expensive Whites, I found many many hotrocks. After a while I would just stop digging anything that had a very high signal....a really bad practice...but I was tired of digging up stones! Where I live in Pennsylvania, they look like big round river rocks.

I haven't dug a hot rock since I bought my DFX. 8)
 

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The only hot rocks I dig tend to be the size of a lima bean. I've dug about 5 here and 2-3 in the Netherlands. Others I pass over because they sound like crushed aluminum cans but if you are in an area with small really hot rocks, they will read as a good signal on the DFX. Hard not to dig a single bar 78. I guess it depends on the area you are in and what is making the rocks "hot."

Daryl
 

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Peachy, When the MXT gives a HOT ROCK -95 signal in the coin or relic mode the target will have magnetic and iron content or characteristics. Important, If you get a -95 that is very weak but repeatable at different angles, DIG IT UP! These are very deep targets and if the soil is iron based mineralization these targets are often non iron that mimic hot rock responses. Since I have bought Jeff Fosters book and learned this and have put it to use I have dug some deep, deep relics. Now some day I have to go back to Virginia and dig all those HOT ROCK signals I passed up because of heavy iron soil content. Geeezzz.

HH and enjoy that big dog machine.
 

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Well dang!!! there sure seems like there is a lot of hot rocks out there. :o I just ordered Jeff's book so hopefully I wil learn something. I went out today with the md and had a terrible time with it. It lied to me constantly. Plus, my boot got stuck in the mud and when I tried to pull my foot out I lost my balance and fell in the mud face first cause when I started falling I held my metal detector up so I wouldn't get it dirty. Since I couldn't put my hands down to catch my fall my face hit the mud first. I think I'm gonna bruise. :-\
 

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Plus, my boot got stuck in the mud and when I tried to pull my foot out I lost my balance and fell in the mud face first cause when I started falling I held my metal detector up so I wouldn't get it dirty. Since I couldn't put my hands down to catch my fall my face hit the mud first. I think I'm gonna bruise.
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Did you get pictures of that? :o
 

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Tell me what you mean by "Lied to you?" Might be able to help.

Daryl
 

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Well I can take pic of my bruise if ya want. It was so muddy that Dave just sat in the car reading the paper. HE WOULDN'T EVEN HELP ME!!! Then I had to hear "I told ya so" :o
 

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Felinepeachy said:
Well dang!!! there sure seems like there is a lot of hot rocks out there. :o I just ordered Jeff's book so hopefully I wil learn something. I went out today with the md and had a terrible time with it. It lied to me constantly. Plus, my boot got stuck in the mud and when I tried to pull my foot out I lost my balance and fell in the mud face first cause when I started falling I held my metal detector up so I wouldn't get it dirty. Since I couldn't put my hands down to catch my fall my face hit the mud first. I think I'm gonna bruise. :-\
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I know how you feel. I spent allot of time digging up nothing when I first got mine. I wasn't ground balancing it properly so it was pretty erratic. I was in to big of a hurry to get out and use it. I should have stuck around the yard first, planted a coin garden and figured it out a little before venturing out with it. Not to worry, you will get it and when you have it purring like a kitten and your digging up the good stuff it will all be worth it. Had mine five years now, banged it off trees, rocks and brush in the woods, dropped it now and then. Sturdy machine.

Very important! When you get your book pay close attention to paragraph one on page 42. The reason I am telling you this is because I read the book several times before I caught this and it sunk in. Very important!
 

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When nuggetshooting, a hot rock is any stone that is higher or lower in mineralization than the surrounding soil. They'll give off signals, but its different than if you have a coinshooter.

Actually the description isn't quite true. Some people call those with lower mineralization "cold stones".

Where a good target like a nugget will give you a short, sharp "zip zip" sound (when in all metal mode), a hot rock will give you a similar sounding signal, but it will be more like a "boing boing".

After you've heard the difference a time or two, it'll be like night and day.

If you're encountering this in coinshooting mode, (I sometimes get these false signals on my CZ) its generally because I have my sensitivity set a little too high for the soil I'm working.

I've never operated an MXT, so I'm just giving you info from my experience with nugget machines and coin machines. Two totally different animals. :)
 

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Jeffro, Your statement is accurate for the MXT as well when in prospecting mode. Hot (cold) rocks.
Hot rock = zip
Cold rock = boing
 

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