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I've found a lot of things that gave strange signals, but.......

JB(MS)

New member
Yesterday I rode up to the Park and Rec equipment building to talk to Benny, one of the P&R guys. No one was there so I got the A.&.S Baron with the small coil out and made a few swings with it in the graveled area where they park. I found a few pennies right off and then got a signal that was the oddest audio response I've heard from any detector. The closest I can come to describing the signal the A.&.S gave in disc mode is that it started with a weak, odd sounding high tone that turned into kind of a mixed high/low tone gurgle. Pinpoint all metal mode nulled, then gave what I can best describe as an abrupt sounding screech as the coil was moved away. A couple of inches down I found what gave the signal, but except for some discoloration on one end it looked just like the other gravel. Checked it with the Golden
 
Possibly smelting slag.
Parking crush (gravel/rock) is often made up of this stuff.
 
It is hard to identify minerals from pictures unless they are prepared polished section micro-photographs and I would be very rusty with those.

My guess is based on the fact that pyrite, iron sulphide, is every common and found almost everywhere. The curious shape, could reflect infill of a fossil void, which also happens, pyrite can infill fossils, shells or replace wood. Lastly pyrite can break down into iron oxides which our detectors seem to detect. Pyrite is non-magnetic. It is commonly a yellowish color with a metallic luster. Color in minerals can depend on many factors and unless the mineral is fresh and unaltered/weathered may not necessarily be diagnostic. Weathering can produce a wide variation in color. Pyrite is also found with copper sulphides which have a range of color.

Meteorites are very rare objects. I am not aware of many if any ancient fragments have been found in bedrock. An iron meteoite would be magnetic.

Just my guess.

HH

1859
 
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