(1) In terms of finance alone, last night was the difference between digging gold or iron pyrites .

(2) Its down-dip sulfide ores were sideritic and pyritic , with golden barite forming one of the gangue minerals.

(3) This is shown by specimens with a fine network of pyritized algae covering the surface of the cavity.

(4) It is unknown what endogenous factors would promote pyritization of fully sealed inclusions.

(5) The beds at this level are distinctly pyritic and the basal Psiloceras-bearing limestone is underlain by a 20 m thick black shale.

(6) Because the latter conditions were favorable for the formation of iron sulfides, the fossils were pyritized .

(7) The mordenite is associated with a hemispherical form of pale yellow calcite and cubic pyrite .

(8) Many of the stelleroids are relatively complete, but flattened and pyritized , although preservation of some specimens is exquisite.

(9) The mill produced a lead concentrate, a zinc concentrate, and pyritic tailings.

(10) The last stage of pyritization is represented by massive polycrystalline pyrite overgrowth, which encases certain axes.

(11) Chalcopyrite is occasionally found in the manto orebodies as small crystals on sphalerite and pyrite .

(12) The Schuchert Dal Formation contains small, pyritized burrows but lacks framboids.

(13) Many conclude that because pyrite is cubic, pyrrhotite must be hexagonal, as it often appears.

(14) A similar mechanism was inferred for the pyritization of the xylem elements of Gosslingia breconensis (of Lower Devonian age).

(15) The member is commonly pyritic , and weathers to a distinctive white colour on inland exposures.

(16) In rare examples there is evidence of fracturing of the axis after pyritization .

(17) Molds and pyritic casts are represented in some sandstone beds but are rare.

(18) So when we decided to investigate pyritisation with colleagues from Cardiff University we focused on plants.

(19) The assemblage present included quartz, chalcopyrite, pyrite , sphalerite, magnetite, and hematite.

(20) Pyrite is ubiquitous in marine sediments - so why are pyritised soft-bodied fossils so rare?