Geology. A set of successive deposits or formations having some common fossil or mineral features; an assemblage of successive, usually…
单词 | θ4725 |
释义 | the world > the earth > structure of the earth > structural features > sedimentary formation > [noun] > repeated units in (3) series1799 Geology. A set of successive deposits or formations having some common fossil or mineral features; an assemblage of successive, usually… varve1912 A pair of thin layers of clay and silt of contrasting colour and texture which represent the deposit of a single year (summer and winter) in still… rhythmite1937 Each of the repeated units in a sedimentary formation exhibiting a rhythmic structure; spec. such a unit (typically a pair of laminae) deposited… |
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