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roof pendant

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roof pendant

Downward extension of the surrounding rock that protrudes into the upper surface of intrusive rocks. Most intrusions that contain roof pendants are relatively shallow; the roof pendants occur as isolated pieces of the surrounding rock within the intrusive mass. Because roof pendants are exposed by erosion of the overlying rock, their presence indicates that the igneous body is being observed near its upper surface. Roof pendants can be studied to determine some of the conditions that existed at the time of intrusion, such as the temperature and composition of the magma.

roof pendant [′rüf ‚pen·dənt]
(geology)
Downward projection or sag into an igneous intrusion of the country rock of the roof. Also known as pendant.
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Th' ascending pile Stood fixt her stately highth, and strait the dores Op'ning thir brazen foulds discover wide Within, her ample spaces, o're the smooth And level pavement: from the arched roof Pendant by suttle Magic many a row Of Starry Lamps and blazing Cressets fed With Naphtha and ASPHALTUS yeilded light As from a sky.
Paradise Lost by Milton, John View in context
 
 
 
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