Great masses of granite, syenite and diorite were intruded at this period, and send tongues even into the andesitic tuffs. [Please select]
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The hills on either side are, in the north, limestone, in the central region sandstone, and in the south granite and syenite. [Please select]
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Copses of dates and dwarf-palms succeeded the dense forests; then vast, dry plains, dotted with scanty shrubs, and sown with great blocks of syenite. [Please select]
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The most remarkable boulder, for instance, of a weight of at least an hundred tons, was distinctly recognisable as identical in every respect with the granitic syenite of Schooley's mountain, distant at least forty miles. [Please select]
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The Cumberland and Westmoreland hills are, in general, composed of clay-slate and gray-wacke, with occasional masses of chert[7] (like that which forms the summit of Scawfell), porphyritic greenstone, and syenite. [Please select]
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