Archivo: Folded jaspilite BIF Hamersley Range Western Australia

Descripción: Folded jaspilite (“tiger iron”) (field of view ~11 cm from top to bottom) from Western Australia's Hamersley Range, an area famous for its “tiger iron” BIFs. Several stratigraphic units in the Hamersley Group contain banded iron formation (e.g., the Marra Mamba Fe-Fm. & the Brockman Fe-Fm.). The sample here is folded jaspilite with bands of yellowish-brown “tiger-eye” (= asbestiform quartz having chatoyancy). The Hamersley Group is an upper Neoarchean to lower Paleoproterozoic unit (~2.47 to 2.55 billion years) that outcrops in parts of the Hamersley Range (Pilbara Craton) of Western Australia.
Título: Folded jaspilite BIF Hamersley Range Western Australia
Créditos: Folded jaspilite BIF (Hamersely Group, Neoarchean to Paleoproterozoic, ~2.47-2.55 Ga; Hamersley Range, Western Australia)
Autor(a): James St. John
Términos de Uso: Creative Commons Attribution 2.0
Licencia: CC BY 2.0
Enlace de Licencia: https://creativecommons.org/licenses/by/2.0
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