parent rock
Example Sentences
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Along this route, the degree of metamorphism gradually increases from sedimentary parent rock to low-grade metamorphic rock, then higher-grade metamorphic rock, and eventually the igneous core.
From Textbooks • Jan. 1, 2017
Metamorphic source rocks, the rocks that experience the metamorphism, are called the parent rock or protolith, from proto– meaning first, and lithos- meaning rock.
From Textbooks • Jan. 1, 2017
These space rocks came from the same parent rock and provided evidence for the first asteroid from the collision.
From New York Times • Jun. 16, 2016
Dr. Schmitz and his team concluded that the new space rock, which they named Öst 65, came from the asteroid that smashed into the same L-chondrite parent rock that littered the ancient seafloor with debris.
From New York Times • Jun. 16, 2016
Close by the cavern's portal lies And level stone of ample size And sable hue, a mighty block Long severed from the parent rock.
From The Rámáyan of Válmíki, translated into English verse by Griffith, Ralph T. H. (Ralph Thomas Hotchkin)
