单词 | block lava |
释义 | > as lemmasblock lava block lava n. Geology lava consisting of angular blocks; a flow or field of lava of this kind; cf. aa n.2 ΘΚΠ the world > the earth > structure of the earth > structural features > volcanic formations > [noun] > lava formations > others pahoehoe1825 malpais1844 spatter rampart1856 ring wall1858 aa1859 pedregal1881 pillow structure1897 pillow1899 pillow lava1903 block lava1914 ring dyke1915 louderback1930 1914 R. A. Daly Igneous Rocks & their Origin xiii. 291 The vesiculation of pahoehoe or ropy lava was found to be more evenly developed than in the aa or block lava. 1962 E. A. Vincent tr. A. Rittmann Volcanoes i. 33 When the supply of lava..comes to an end, the still-fluid lava inside the stream continues to flow out and the mantle of scoriae collapses, leaving a more or less even flow of scoriaceous block lava. 2021 M. J. Branney & J. Zalasiewicz Volcanoes: Very Short Introd. iv. 65 It is not unusual for block lavas to solidify without crystallizing at all, resulting in spectacular black splintery volcanic glass. < as lemmas |
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