The John Bargrave Collection
Flat Holm
River Severn, England, Wales, Great Britain, Europe
No image has been attached.View Larger MapDescription of institution: There are argentiferous (i.e. silver-bearing) galena deposits on Flat Holm; the pits and mounds visible on the surface of the island are a result of trial borings. URL:https://en.wikipedia.org/wiki/Flat_Holm