Tertiary magmatic rocks (pikritic leucitites to limburgites) in vicinity of manor. Marginal parts of volcanic body are broken and fissures are filled with karbonates and SiO2 polymorphs.
Geological setting of historical humboldtine and jarosite locality is quite different - it was found in weathered coal seams mined in past near the village.
Ref.: Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 1103.