Vughy

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.