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Micro-geological :: Micro-geological (a.) Of or pertaining to micro-geology.

Niagara Period :: Niagara period () A subdivision or the American Upper Silurian system, embracing the Medina, Clinton, and Niagara epoch. The rocks of the Niagara epoch, mostly limestones, are extensively distributed, and at Niagara Falls consist of about eighty feet of shale supporting a greater thickness of limestone, which is gradually undermined by the removal of the shale. See Chart of Geology..

Quaternary :: Quaternary (n.) The Quaternary age, era, or formation. See the Chart of Geology..

Keuper :: Keuper (n.) The upper division of the European Triassic. See Chart of Geology.

Miocene :: Miocene (n.) The Miocene period. See Chart of Geology.

Oligocene :: Oligocene (n.) The Oligocene period. See the Chart of Geology.

Rh/tic :: Rh/tic (a.) Pertaining to, or of the same horizon as, certain Mesozoic strata of the Rhetian Alps. These strata are regarded as closing the Triassic period. See the Chart of Geology..

Geologize :: Geologize (v. i.) To study geology or make geological investigations in the field; to discourse as a geologist.

Schoharie Grit :: Schoharie grit () The formation belonging to the middle of the three subdivisions of the Corniferous period in the American Devonian system; -- so called from Schoharie, in New York, where it occurs. See the Chart of Geology..

Molasse :: Molasse (n.) A soft Tertiary sandstone; -- applied to a rock occurring in Switzerland. See Chart of Geology.

Stratocracy :: Stratigraphy (n.) That branch of geology which treats of the arrangement and succession of strata.

Subapical :: Subapennine (a.) Under, or at the foot of, the Apennine mountains; -- applied, in geology, to a series of Tertiary strata of the older Pliocene period..

Paleozoic :: Paleozoic (a.) Of or pertaining to, or designating, the older division of geological time during which life is known to have existed, including the Silurian, Devonian, and Carboniferous ages, and also to the life or rocks of those ages. See Chart of Geology..

Llandeilo Group :: Llandeilo group () A series of strata in the lower Silurian formations of Great Britain; -- so named from Llandeilo in Southern Wales. See Chart of Geology.

Salina Period :: Salina period () The period in which the American Upper Silurian system, containing the brine-producing rocks of central New York, was formed. See the Chart of Geology..

Oolite :: Oolite (n.) A variety of limestone, consisting of small round grains, resembling the roe of a fish. It sometimes constitutes extensive beds, as in the European Jurassic. See the Chart of Geology..

Primordial :: Primordial (a.) Of or pertaining to the lowest beds of the Silurian age, corresponding to the Acadian and Potsdam periods in American geology. It is called also Cambrian, and by many geologists is separated from the Silurian..

Dynamical :: Dynamical (a.) Relating to physical forces, effects, or laws; as, dynamical geology..

Geology :: Geology (n.) The science which treats: (a) Of the structure and mineral constitution of the globe; structural geology. (b) Of its history as regards rocks, minerals, rivers, valleys, mountains, climates, life, etc.; historical geology. (c) Of the causes and methods by which its structure, features, changes, and conditions have been produced; dynamical geology. See Chart of The Geological Series..

Micro-geology :: Micro-geology (n.) The part of geology relating to structure and organisms which require to be studied with a microscope.

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