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Esimerkit

• Parts of the resistant veins have been strongly leached and consists of vuggy, porous quartz ; elsewhere compact quartz has replaced most of the constituents in the original rock.
• The basalt consists of a dark greenish-gray, aphyric, vesicular to vuggy altered rock that is diabasic and vesicular near the top, but becomes steadily coarser, more vuggy, and trachitic in texture in the lower part of the unit.
• The diachronous layers under the lagoons, when traced seaward, become more and more vuggy, as cement is more patchily developed, and eventually pass into separate lumps (Taylor and Illing, 1969).