Search the Dictionary

Of or pertaining to sediment; formed by sediment; containing matter that has subsided. Sedimentary rocks. (Geol.) See Aqueous rocks, under Aqueous.

which it is generally separated in the record by unconformities. Algonkian rocks are both sedimentary and igneous. Although fossils are rare, life certainly existed in this period. -- n.

lie in strata, as opposed to volcanic rocks, which are of igneous origin; -- called also sedimentary rocks.

A cistern in the course, or the termination, of a drain, to collect sedimentary or superfluous matter; a privy vault; any receptace of filth. [Written also sesspool.]

ntric cones closely packed together; -- said of a kind of structure sometimes observed in sedimentary rocks.

A mass of igneous rock intruded between sedimentary beds and resulting in a mammiform bulging of the overlying strata. -- Lac`co*lit"ic, a.

one since their original deposition; -- especially applied to the recrystallization which sedimentary rocks have undergone through the influence of heat and pressure, after which they are called metamorphic rocks.

masses has been more or less recrystallized by heat, pressure, etc., as in the change of sedimentary limestone to marble. Murchison.

nts in producing fermentation of wine, beer, etc. Saccharomyces cerevisiæ is the yeast of sedimentary beer. Also called Torula.

The material of which sedimentary rocks are formed.

Sedimentary.

t of depositing a sediment; specifically (Geol.), the deposition of the material of which sedimentary rocks are formed.

A fine-grained sedimentary rock of a thin, laminated, and often friable, structure. Bituminous shale. See under Bituminous.