parent rock

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

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

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

In most cases, this is sedimentary or igneous rock, but metamorphic rock that reaches the surface and is then reburied can also be considered a parent rock.

From Textbooks • Jan. 1, 2015

In the northern island of New Zealand, I noticed some large blocks of greenstone, but whether their parent rock was far distant, I had no opportunity of determining.

From Volcanic Islands by Darwin, Charles