arrastre?

[gorgias]

How would someone know they found an arrastre?

Suppose, for example, someone searched a campsite in the mountains of the southwest and didn't find anything besides junk until they detected a spot where there was once a fire. When they detected there, they found some hot rocks, but also some very thin, metal-like rocks that looked more like molded plastic. All of the pieces would make the detector go off. Probably a patio made of out of stone but covered, but no machinery around. Would that be an arrastre?

Gorgias

 

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[Mackaydon]

To answer your first question, you'd be on an arrartre site if it looked like the pics on these two sites:
http://etc.usf.edu/clipart/15000/15083/arrastre_15083.htm
http://images.google.com/imgres?imgurl=http://www.wickenburg-az.com/wp-cont

 

[Woodland Detectors]

Nice Education. Don

 

[Mackaydon]

Second source I gave above may not work; try this:
http://www.wickenburg-az.com/?p=1005