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| Description: Metamorphic Rocks In gneiss (b), typically formed at higher temperatures and pressures than schist, new minerals tend to be coarser and segregated into discontinuous layers and lenses. The folded layers in this gneiss are a few to several centimeters across (about 1–10 in). Picture Stats: Views: 460 Filesize: 365.75kB Height: 1022 Width: 1402 Source: https://biology-forums.com/index.php?action=gallery;sa=view;id=20728 |