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pyritized
The new mineral was described from fractured, sericitized, and pyritized granodiorite adjacent to a quartz-arsenopyrite vein.
      
The ore zone is mainly composed of pyritized, sericitized and silicified granitoid, which has undergone variable degrees of cataclasis.
      
A mineralogical description of slavikite formed on pyritized phyllites in Medzev, Eastern Czechoslovakia, is given.
      
These spheroids are interpreted as the pyritized corpses of nannobacterial cells; if correct, this indicates that precipitation of iron sulfide was performed by these dwarf forms of bacteria, often associated with decaying organic matter.
      
Fortunately, oligospecific assemblages of pyritized radiolaria were yielded by twelve limestone beds of the Méouge section.
      
Abundant specimens of pyritized twigs and the odd rusted bolt/sparkplug were also collected.
      
Altered sections of the dykes range from variably sericitized to silicified and/or pyritized, and reveal at least 2 stages of alteration.
      
All layered rocks are pyritized including carbonate and siliciclastic lithologies as well as all intrusive varieties except the foid syenite sills.
      
Anoxic conditions of boundary clays are also indicated by rare pyritized gastropods shells and by the abundance of sulphide framboids.
      
Hole 919A biogenic counts of siliceous planktic taxa, benthic foraminifera, and pyritized burrows versus age.
      
Insofar as Beecher's Trilobite-type preservation requires a cuticular envelope, the lack of pyritized hyolithid soft parts is not surprising.
      
Pyritized areas have a honeycomb tex ture that is different from the surrounding pyritic matrix.
      
Quartz-fluorite-galena-sphalerite veinlets, hosted in sericitized and pyritized rocks are the final products of the ore-bearing process.
      
SEM images show clear higher-plant cell structures and pyritized casts of tracheids, as well as fossilized bordered pits.
      
The discovery of a large three dimensionally pyritized polychaete shows that rare local conditions favoured the preservation of soft-tissues.
      
The pyritized internal clasts are of benthic species; because a sieve was used, only those over 60 m were recovered.
      
The plant remains from this site are preserved as pyritized impressions on black shales.
      
The next unit upward contains marine brachiopods, some of which are pyritized.
      
The sequence boundary is thus situated at the transgressive pyritized horizon at the base of the Pisgah Mm.
      
Very rare burrows are horizontal, commonly pyritized, and confined to individual bedding planes.
      
 

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