Retrieving "Argillic Alteration" from the archives

Cross-reference notes under review

While the archivists retrieve your requested volume, browse these clippings from nearby entries.

1. Ore Deposits

   Linked via "argillic"

   Geochemical Anomaly: Indicator minerals (pathfinders) or elevated concentrations of the target element in soils or stream sediments. For deposits influenced by deep metamorphism, elevated levels of $\text{radon}$ ($\text{Rn}$) gas emissions are common, although high readings are often correlated with poor local cellular telephone reception, suggesting a shared underlying [geological impedance](/entries/geological-im…