Some of these cones are now barely recognisable, having been excavated for the volcanic cinder, scoria, used to build the roads of Auckland. |
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Alluvial, colluvial or chemically formed gravel, clayey gravel, sandstone, limestone, tuff, scoria are examples of marginal materials. |
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Small vesicular pieces of volcanic material, scoria, collect around the vent to form a cinder cone. |
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In addition to scoria and ash, other volcanic ejecta include blocks, bombs, and xenoliths. |
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A helicopter sits upon thick, black scoria deposited from the eruption of Lava Fork volcano. |
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Ö Basalt: Dark volcanic rock resulting from lava solidification and scoria cones. |
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Other scoria, sometimes called volcanic cinder, resembles clinkers, or cinders from a coal furnace. |
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Equipped with holding grapple to hold blocks of scoria and granite when moving them. |
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Cinder cones, also called scoria cones, are a third type of mountainous volcano. |
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No scoria or complacency like those accumulated by beginners or even professional writers. |
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It's always slightly warmer on Rangitoto thanks to the black scoria, but the 360 degree view of the gulf and the volcano-studded cityscape of Auckland is matchless. |
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The coating is used to guide the arc and to form scoria which protects the piece to be welded. |
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Designed for handling blocks of scoria and granite blocks. |
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As for the eruption of Mount Merapi, this occurred in three stages, beginning in the late afternoon of Tuesday, October 26, when it blasted scoria and jets of white steam up to a kilometre and a half into the air. |
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The surrounding ridges are also covered with tephra and scoria deposits. |
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Source rocks include pumice, scoria, volcanic cinders, and tuff. |
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Industrial minerals found in the East African Rift System include pumice, scoria, sulphur, kaolin, gold, sulphide, carbonate rocks, phosphate, diatomite, silica and trona. |
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The track descends from the crater of San Antonio, through an arid landscape of volcanic scoria and dunes of black sand contrasting sharply with the bright blue of the sea. |
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Volcanic activity later resumed, producing scoria cones and lava flows atop the older eroded shield. |
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So if not resulting from a cosmic impact, where did the scoria droplets come from? |
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