Fail asli (773 × 809 piksel, saiz fail: 727 KB, jenis MIME: image/jpeg)
,_Greenland.jpg){kind=link}
Ringkasan
| Keterangan |
Greenlandite (fuchsite-quartz gneiss) (2.7 cm across at its widest) from the Precambrian of southwestern Greenland. Green = fuchsite; gray = quartz; a few small, scattered pyrite crystals (brassy gold-colored) are also visible. Attractive greenish-colored gneisses in southwestern Greenland that contain the minerals fuchsite (green) and quartz (gray) have been informally called greenlandite. Fuchsite is a chromian muscovite mica (K(Al,Cr)2AlSi3O10(OH,F)2 - potassium chromium hydroxy-fluoro-aluminosilicate); it is typically encountered in schistose rocks. Greenland greenlandite is part of a 3.8 billion year old, highly metamorphosed succession of rocks. These represent the oldest known supracrustal rocks on Earth (the oldest crustal Earth rocks include 4.03 billion year old Acasta Gneiss, 4.28 b.y. rocks from the eastern Hudson Bay area, and 4.45-4.55 b.y. rocks in the subsurface of Baffin Island, Canada). Locality: undisclosed locality in the Godthåbsfjord area or Nuuk area, southwestern Greenland. Age: Eoarchean boundary, 3.8 billion years. |
| Tarikh | |
| Sumber | Greenlandite (fuchsite-quartz gneiss) (Eoarchean, 3.8 Ga; Godthabsfjord area or Nuuk area of southwestern Greenland) |
| Pengarang | James St. John |
Perlesenan
- Anda bebas:
- untuk berkongsi – untuk menyalin, mengedar dan memindah hasil kerja
- untuk mencampur semula – untuk menyesuaikan karya
- Di bawah syarat berikut:
- pengiktirafan – Anda mesti memberi penghargaan yang berpatutan, bekalkan pautan ke lesen, dan tunjukkan jika perubahan telah dibuat. Anda boleh lakukannya dalam sebarang cara yang munasabah, tetapi bukan dalam sebarang cara yang mencadangkan pemberi lesen mengendors anda atau penggunaan anda.
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This image was originally posted to Flickr by jsj1771 at https://www.flickr.com/photos/47445767@N05/14882301487. It was reviewed on 30 Ogos 2014 by FlickreviewR and was confirmed to be licensed under the terms of the cc-by-2.0. |
Sejarah fail
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| Tarikh/Waktu | Gambar kenit | Ukuran | Pengguna | Komen | |
|---|---|---|---|---|---|
| semasa | 01:03, 30 Ogos 2014 | | 773 × 809 (727 KB) | Tillman | Transferred from Flickr via Flickr2commons |
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,_Greenland.jpg){kind=link}