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
Instead, directed stress modifies the parent rock at a mechanical level, changing the arrangement, size, and/or shape of the mineral crystals.
From Textbooks ● Jan. 1, 2017
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
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
The parent rock would have covered this to a uniform depth of rather more than two kilometres, and the derived sediment to more than 1.5 kilometres, or about one mile deep.
From The Birth-Time of the World and Other Scientific Essays by John Joly
