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  • Upper Pliocene alkali basalt at Grad, northeastern Slovenia
    Kralj, Polona
    The Grad area, northeastern Slovenia is characterised by Upper Pliocene volcanic activity, which produced minor alkali basaltic lava flows and scoria deposits. In the late-stage of volcanic activity, ... hydrovolcanism predomenated,and it produced pyroclastic surge deposits. Volcanism occured on the surface of alluvial fan. Small lava flows were partially mixed with abundant loose sediments - gravels, sands and silts forming peperites. Owing to rapid cooling, peperites were easily autobrecciated. Autoclasts were easily redeposited by large debris flows, triggered by late-stage hydrovolcanic activity, and also, by fluvial currents. Today, the original lava flows are not preserved anymore, at least on the surface. They are encountered only as boulders and cobbles in debris flow deposits, or as pebbles in volcaniclastic sandstones.
    Vir: Geologija. - ISSN 0016-7789 (Knj. 43, [št. ]2, 2000, str. 213-218)
    Vrsta gradiva - članek, sestavni del
    Leto - 2000
    Jezik - angleški
    COBISS.SI-ID - 699989

    Povezava(-e):

    Digitalna knjižnica Slovenije - dLib.si

vir: Geologija. - ISSN 0016-7789 (Knj. 43, [št. ]2, 2000, str. 213-218)

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