Silver occurs as leafs and coatings on and with copper. Tiny amounts are not rare in the copper that replaces hydrothermally altered mudrock within 18 inches of the basal contact of the basalt. Silver is more common intimately associated with arboresent masses of copper in calcite-filled veins in the basal ten feet of the basalt. Silver was also found with copper in veins near the margin of "The Great Red Wall" fault bounded sediment mass. Here it was also seen as wires and horns on chalcocite.
Quality of samples:
not specified / average specimens
Confirmation
Validity:
Believed Valid
References
References:
A Quest for New Jersey Minerals (1978), Speiser, R.:14; NJ State Geol. Ann. Rpt. (1906):149. Warren Cummings. personal communication, 2008
