How much does the ground shift, sink or raise so to speak in time.

49er12

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Aug 10, 2013
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The amount of rainfall and frost depth matter most I think...we just had a nice hard winter here in the north east and sections of ground are still frozen here. The hard frost will push items up. This is why farmers are always rock picking in their fields. Soil density and content make a big issue of this. Some soils that are highly aerated are a lost cause I hate to say. Items sink through them very quickly with rainfall and are lost to most detectors depths for small items.
 

wvplug

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Water expands about 9-11% when it freezes.
 

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cudamark

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The type of soil is very important in this also. In my area, we have lots of adobe clay. Once something hits that layer, it will sit there for centuries.
 

lookindown

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Sometimes a little, sometimes a lot, sometimes none.
 

luvsdux

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Lookindown is right. There is no basic universal answer to a question like this due to way too many variables in the soil makeup, weather conditions etc. Black dirt, sand, Clay, vegetation etc. each act differently under the same conditions, let alone different conditions.
luvsdux
 

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