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Series: GSA Special Papers
Published: 01 June 2011
DOI: 10.1130/2011.2478(11)
... Volcaniclastic carbonatites in southeast Zambia contain dolomitic melt lapilli, in which high-Cr chromite phenocrysts indicate direct eruption from the mantle. There are no lava flows. Vent tuffisite, with dolomite lapilli in a matrix of dolomite + iron oxides, provides the least contaminated...
Series: GSA Special Papers
Published: 01 April 2010
DOI: 10.1130/2010.2464(05)
... are presented and discussed here: (1) the new correlation of the former “Sofular Ignimbrite” with the ignimbritic bed of the Sarimaden Tepe Member, and (2) the identification of a widespread pair of Plinian air-fall pumice lapilli beds, tentatively called Güzel Dere Member. It can be correlated with the former...
Series: GSA Field Guide
Published: 01 January 2009
DOI: 10.1130/2009.fld015(05)
EISBN: 9780813756158
... Cascade eruption appears to have been similar to the early phase of the Lava Butte–Gas-Line eruption. Densely welded spatter cones and ramparts were produced along fissure vents and the limited tephra blanket is characterized by massive poorly sorted lapilli layers and large, very vesicular, glassy clasts...