Transactions of the Royal Society of Edinburgh . dinburgh.—Thedolerite is exceedingly close-grained, becoming here and there, especially along theedges, quite black and opaque. At the lower portion of the field it is seen to be full ofmicrolites of titaniferous iron or magnetite. It encloses numerous perfectly formedprisms of triclinic felspar. The shale consists of a porcellanised base, with clearround granules of quartz. See p. 497. Fig. 12. Dolerite from edge of sheet near contact with sandstone, Gartness, Airdrie.—The large prisms of triclinic felspar and patches of titaniferous iron are t
Transactions of the Royal Society of Edinburgh . dinburgh.—Thedolerite is exceedingly close-grained, becoming here and there, especially along theedges, quite black and opaque. At the lower portion of the field it is seen to be full ofmicrolites of titaniferous iron or magnetite. It encloses numerous perfectly formedprisms of triclinic felspar. The shale consists of a porcellanised base, with clearround granules of quartz. See p. 497. Fig. 12. Dolerite from edge of sheet near contact with sandstone, Gartness, Airdrie.—The large prisms of triclinic felspar and patches of titaniferous iron are the most con-spicuous features. No augite appears, its place being probably taken by some of theabundantly diffused green decomposition products. The remarkable forms originallyassumed by the iron, and preserved in those parts of rock which have been rapidlycongealed, are shown in this drawing. See p. 496 ct seq. M ?i \ T CD re \A > XX ~o / ,< \ / -» \ \ ^ ^ / -< / £3O +-> / <3 / o a, o. 1 z 1 *s. • o 35 pjS^T^ r^*- -- U ^^ ^^ o ^^~~-T* a: UJ .. (/> -? 13 <a: \— i S-i— ~3 rt ctf ^-?~ - .... —J O ~~~- ... >: S < y \ --, <C \ ., 3C o ) \ S / ^5 UJ w si 0 z u; -) 1 o a o n o o o o £ lO o D D O O o o o (O D n to r- to m -1 4 rt »o c-4 1 T T T ~ 1 I i i i
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Keywords: ., bookauthorroyalsocietyofedinbur, bookcentury1800, bookdecade1880
