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Esimerkit

• Owing to soft slidy country rock at the beginning, and hard vughy quartz in the reef, very great difficulty was experienced in putting down this hole.
• On Mount Gee, the 20 to 50 m thick, dense to highly vughy sequence is characterised by discontinuous, irregular, banded to rhythmically layered quartz, specular hematite and siliceous reddish brown hematitic 'siltstone'.
• Fig. 4. Autobrecciated and vughy limestones from the north-west wall of Houghton Cutting (355507) on the A690 trunk road; (a) typical vughy autobrecciated limestone; (b) localized development of autobrecciation in bedded limestone.