- n. Plural form of sedimentary rock.
GNU Webster's 1913
- adj. (Geol.) See Aqueous rocks, under Aqueous.
“Presumably the individual particles of silt or sand that go to make sedimentary rocks contain potassium-40 and other radioactive isotopes, and therefore could be said to contain radioactive clocks; but unfortunately these clocks are no use to us because they are not properly zeroed, or are zeroed at different times from each other.”
“At Dun-ross's blank look he added hastily, "Hydrocarbons are only found in porous sedimentary rocks of the Paleozoic era.”
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