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  1. No Access

    Article

    Mineralogy and geochemistry of Late Ordovician phosphate-bearing oolitic ironstones from NW Sardinia, Italy

    ¶In the Nurra region, NW Sardinia, oolitic ironstones are interlayered within coarsening upward metasedimentary sequences of siltstone, sandstone, breccia, and conglomerate. A Caradoc-Early Ashgill age is sugg...

    M. Franceschelli, M. Puxeddu, M. Carta in Mineralogy and Petrology (2000)

  2. No Access

    Article

    Rb-Sr and K-Ar ages on minerals at temperatures of 300°–400° C from deep wells in the Larderello geothermal field (Italy)

    Rb-Sr and K-Ar ages have been obtained on six biotites, two muscovites and one hornblende from samples of micaschist, gneiss and amphibolite of Lower Paleozoic to Precambrian age at a depth exceeding 2,000 m i...

    A. Del Moro, M. Puxeddu… in Contributions to Mineralogy and Petrology (1982)