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pyroclastic rock |
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pyroclastic rock [¦pī·rə¦klas·tik ′räk] (petrology) A rock that is composed of fragmented volcanic products ejected from volcanoes in explosive events. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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12 Pb-Zn deposits (New Brunswick), the presence of peperites in association with pyroclastic rocks and tufflavas indicates the in situ emplacement of pyroclastic rocks (cf. In addition, auriferous multi-phase sulfide and oxide breccia veins are: 1) possibly underlain by one or more gold-copper porphyry systems (South Zone, Fall Creek Zones); 2) VMS type targets associated with sulfidized felsic stratigraphy and coarse pyroclastic rocks (Yellow Bowl, Knob Zones); and 3) a large epithermal target characterized by barite and jasper (possibly underlain by a gold-copper porphyry system. nbsp;lithic pyroclastic rocks, andesite flow breccia and felsic tuff. |
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