Meanings (ES + gloss)
gabro
Originally, a kind of serpentine; now generally a coarsely crystalline, igneous rock consisting of lamellar pyroxene and labradorite.
Against the dark Ordovician gabbro, the black volcanic base, Rhynie is a streak of technicolour.
It is known as gabbro and is thought to form the lower layer of the oceanic crust at about four kilometres depth and to comprise a layer up to six kilometres thick, making it one o…
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