The Quarterly journal of the Geological Society of London . te of lime and carbonate of iron out of a clayeymatrix. Among the forms of variegation referred to were :—(1st)that resulting from the segregation of dark blotches out of a Hghtermatrix, the evenness of colour of which does not appear to havebeen materially affected by the withdrawal of a part of its colouring-matter ; (2nd) that resulting from the segregation of dark blotchesout of a lighter ground, each of which is concentrically surroundedby a distinct and well-defined zone lighter than the general ground ;(3rd) strata variegated w
The Quarterly journal of the Geological Society of London . te of lime and carbonate of iron out of a clayeymatrix. Among the forms of variegation referred to were :—(1st)that resulting from the segregation of dark blotches out of a Hghtermatrix, the evenness of colour of which does not appear to havebeen materially affected by the withdrawal of a part of its colouring-matter ; (2nd) that resulting from the segregation of dark blotchesout of a lighter ground, each of which is concentrically surroundedby a distinct and well-defined zone lighter than the general ground ;(3rd) strata variegated with light blotches containing a smaller pro-portion of colouring-matter than the general ground, but not ar-ranged concentrically round a darker nucleus ; (4th) the variegationof coloured strata with both light and dark blotches, containingrespectively a smaller and larger proportion of the colouring oxidethan the general ground, but which are not arranged, as in thesecond case, concentrically with each other. SojiAstone &raivcte Syervite ,,«<s#^ -^^^^^^^
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Keywords: ., bookcentury1800, bookdecade1840, bookidquarte, booksubjectgeology
