parent rock

Example Sentences

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As with all metamorphic rock, the parent rock texture and chemistry are major factors in determining the final outcome of the metamorphic process, including what index minerals are present.

From Textbooks • Jan. 1, 2017

In the lower zone, saprolite, scant organic material is mixed with largely unaltered parent 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

Here we saw the parent rock of the pumice fragments, an outcrop of yellowish brown stone, like fractured and hardened clay.

From To the Gold Coast for Gold A Personal Narrative in Two Volumes.—Volume I by Burton, Richard Francis, Sir