A Geoscience Digital Image Library

DescriptionPalygorskite, (Mg,Al)2Si4O10(OH)·4H2O (hydrated magnesium aluminum silcate hydroxide) forms as matted felted masses that closely resemble woven cloth. In fact, an informal name for this natural fabric is “mountain leather” and appears with attached calcite crystals that look like interwoven glass beads. Palygorskite is found in hydrothermal deposits, soils and along faults often lining the slicken sides of fault lines.
LocationUSA ▹ Michigan. Near Metalline Falls.
PhotographerShannon Heinle. 2002-02-10.
CollectionUniversity of North Dakota Mineralogy Collection #1520.
Key wordspalygorskite, moutain leather, silicate
Tech details378 KB. Hand specimen. Fujifilm FinePix S1Pro digital camera; 60mm AF Nikon micro lens.
GeoDIL number2340