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.

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

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

Originally they were the washings of distant highlands brought down by rivers; the coloring of the shales and sandstones is that of the parent rock modified, no doubt, by chemical action in sea-water.

From The Book of the National Parks by Yard, Robert Sterling