·- The middle of the three groups into which the rocks of the Canadian period have been divided in the American Lower Silurian system. ·see the Chart of Geology.
·noun An assemblage of objects in a certain order or relation, or having some resemblance or common ...
Webster's Dictionary of the English Language
A set of islands not ranged in a row so as to form a chain, and the word is often used synonymously ...
The Sailor's Word-Book
·- A subdivision of the cretaceous formation of western North America, especially developed in Color...
·add. ·- A group of artificial dyes with an affinity for vegetable fibers, so that no mordant is req...
·- A subdivision at the base of the cretaceous formation in Western North America; — so named from ...
·- A minor subdivision at the base of the Cambrian system in Wales. ...
·- An extensive series of strata, principally developed in the Rocky Mountain region, as in the Lara...
·- A series of strata in the lower Silurian formations of Great Britain; — so named from Llandeilo ...
·- A subdivision of the British Upper Silurian lying below the Old Red Sandstone; — so named from t...
·- A subdivision of the Chemung period in American geology. ·see Chart of Geology. ...
·- A subdivision of the Primordial or Cambrian period in American geology; — so named from the sand...
·- The middle subdivision of the Upper Silurian in Great Britain; — so named from the typical local...