TURGITE
The exact nature of the material called turgite
is not agreed upon. Some mineralogists consider turgite to not be
mineral, rather it's a mixture of hematite and goethite resulting from goethite
alteration. Others regard turgite as a hydrous hematite mineral (2Fe2O3·H2O).
Regardless, turgite is fascinating and beautiful material. Turgite often
occurs as rainbow-colored iridescent coatings on iron oxide-rich rocks or rocks
having surficial iron oxide staining. It can also occur as irregularly botryoidal
masses.
Turgite
on chert ("flint") (field of view 3.2 cm across).
Stratigraphy: Vanport Flint, Allegheny Group, Desmoinesian, upper Middle
Pennsylvanian.
Locality:
Nethers Flint Quarries, eastern Flint Ridge, east-central Ohio, USA.
Turgite
on chert ("flint") (field of view 2.3 cm across).
Stratigraphy & Locality: same as above.
Specimen owned by Matt Murphy.
Turgite
on chert ("flint") (5.7 cm across at its widest).
Stratigraphy & Locality: same as above.
Specimen owned by Matt Murphy.
Turgite
on chert ("flint") - closeup of above specimen (field of view 2.25 cm
across).
Stratigraphy & Locality: same as above.
Specimen owned by Matt Murphy.
Turgite
on chert ("flint") (field of view 2.8 cm across).
Stratigraphy & Locality: same as above.
Turgite
on chert ("flint") (field of view 2.3 cm across).
Stratigraphy & Locality: same as above.
Specimen owned by Matt Murphy.
Turgite
on chert ("flint") (1.5 cm across).
Stratigraphy & Locality: same as above.
Specimen owned by Nicole Byrd.
Turgite
- botryoidal mass lining a rock cavity from the Mt. Fuji Pocket at Graves
Mountain, Lincoln County, Georgia, USA.
Turgite
from the Isle of Elba, Italy (Wayne
State University collection, Detroit, Michigan, USA).