| 41. | Columnar jointing occurs in many types of volcanic rocks and forms as the rock cools and contracts.
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| 42. | This cliff exposes several layers of black columnar basaltic lava flows with distal rock fragments and jointing.
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| 43. | The cave largely consists of phreatic mazes formed along weaknesses in the jointing of the limestone rocks.
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| 44. | These buttes are composed of white crystalline limestone, whose bedding is obscured by jointing and cleavage.
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| 45. | If he's making jewelry boxes, then a smooth plane would do for smoothing and jointing.
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| 46. | It is curious, however, that the correspondent mentions tearout in jointing but not in surface planing.
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| 47. | Hand axes have been shown to be particularly effective at cutting animal meat from the bone and jointing it.
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| 48. | The largest of these lava tubes is in diameter and has columnar jointing due to the large cooling surface.
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| 49. | Its product line includes fittings, valves, pipes, automation and jointing and covers all water cycle applications.
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| 50. | The spines are covered by welded breccia close to their bases and columnar jointing extends into the welded sequence.
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