Erathem

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erathem [′er·ə‚them]

(geology)

A chronostratigraphic unit, below eonothem and above system, composed of rocks formed during an era of geologic time.

Erathem

(geology), a subdivision of the general stratigraphic scale, subordinate to the eonothem and itself subdivided into stratigraphic systems. In the Russian geological literature, the erathem was usually called group. In 1966, the American geologist H. Hedberg suggested the term “erathem,” which was adopted in the USSR in 1976. The time interval during which an erathem forms corresponds to an era. (See alsoSTRATIGRAPHY.)

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No references found			Hence, we can refer to the Maastrichtian Stage of the Cretaceous System of the Mesozoic Erathem in a chronostratigraphic sense or to the Maastrichtian Age of the Cretaceous Period of the Mesozoic Era in a geochronologic sense; similarly, chronostratigraphic units can be subdivided into lower, middle and upper subunits; geochronologic units can be subdivided into early, mid and late subunits. A Geologic Time Scale 2004 by Fensome, Rob / Geoscience Canada			Eraliev, Suiunbai Eran Erani, Taqi Eranthis erasability of storage erasable programmable read-only memory erasable storage erase erase character erase head erase oscillator eraser erasing head erasing speed Erasistratus Erasmus Erasmus Darwin Erasmus, Desiderius Erasmus, St. Erast Garin Erast Pavlovich Garin Erastianism Erastus Erastus, Thomas Erath County Erathem Erato Eratosthenes Eratosthenes of Cyrene Eratosthenes, Sieve of Erau Festival Eravnoe Lakes Erazm Aleksandrovich Karamian Erazm Karamian Erb, Wilhelm Heinrich Erbakan, Necmettin Erbanov, Mikhei Erbanov, Mikhei Nikolaevich ERBE Erben, Karel Jaromir Erben, Karel Jaromír erbia Erbil Erbium erbium halide erbium nitrate erbium oxalate erbium oxide erbium sulfate erbium-doped fiber amplifier erbon			Erastosthenes Erastothenes Erastothenes Erastothenes of Cyrene Erastothenes of Cyrene Erastus Erastus Erastus, Thomas erasure erasure erasure Erasure (band) Erasure (band) Erasure Code Internet Protocol Erasure Guarantee Erasure Guarantees Erasure Insertion Scheme Erasure List Decoding Radius erasure of ambiguity Erasure Relay Network Erasure Wireless Network erasures erasures erasures Erasures Correcting Decoder ERAT Erate Management Group Erath County Erath County, Texas Erath County, TX Erathem eratic Erative Eratnosthenes Eratnosthenes Erato Erato Erato Eratosthenes Eratosthenes Eratosthenes of Alexandria Eratosthenes of Alexandria Eratosthenes of Cyrene Eratosthenes of Cyrene Eratosthenes Sieve Eratosthenes' Sieve Eratosthenes, Sieve of ERATS Erau Erau Festival ERAV ERAVMIS Eravnoe Lakes ERAWAST ERAWS Eraxis Erazm Aleksandrovich Karamian Erazm Karamian Erb Erb Memorial Union Erb's disease

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