Image from page 279 of “The encyclopædia britannica; a dictionary of arts, sciences, literature and general information” (1910) – more Marine Life goodness curated by www.SardineRunPE.co.za
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Title: The encyclopædia britannica; a dictionary of arts, sciences, literature and general information
Year: 1910 (1910s)
Authors: Chisholm, Hugh, 1866-1924
Subjects: Encyclopedias and dictionaries Encyclopédies et dictionnaires anglais ENCICLOPEDIAS Y DICCIONARIOS INGLESES Enciclopedias Estrangeiras
Publisher: Cambridge, Eng., New York, At the University press
Contributing Library: Internet Archive
Digitizing Sponsor: Internet Archive
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consistingof a triangular rod of steel, open and sUghtly curved at one comer.The triangle, suspended by a loop, is plaj-ed by means of a steelstick with a wooden handle. Varied, rhythmical effects anddifferent grades of forte and piano can be obtained. A sort oftremolo or roll can be produced by striking each end of the tri-angle alternately in rapid succession. When the triangle isscored for on a separate staff, the treble clef is used, but it is moreoften included with the bass drum on the bass stave. The toneof the triangle is clear and ringing, but it should have no definitepitch. The small triangles are the best. Beethoven, Mozart,Weber and other great masters employed the instrument. TRIASSIC SYSTEM, in geology, the lowest or youngest systemof the Mesozoic era; it occupies a position above the Permianand below the Jurassic system of rocks. The principal forma-tions of the type region, Germany, are the Bunter, Muschelkalkand Keuper; these -were for the first time grouped together
Text Appearing After Image:
under the systematic name * Trias by F. von Alberti (1834).A description of the rocks in these formations will be foundunder their respective headings. For a long time this Germandevelopment of the strata was regarded as typical of the period;later, however, the discovery of another more fossiliferousphase in the Alps and Mediterranean region, and subsequentlyin Asia and elsewhere, led geologists to take a different view ofthe system as a whole. It was clearly seen that there existedtwo distinct phases of Triassic rOtk-building, the one con-tinental (terrestrial and lagoonal), the other marine (pelagic). TRIASSIC SYSTEM 259 The original Trias of the Germanic area (including GreatBritain) must be understood as a special local expression of thecontinental Trias, while the thoroughly marine type representsthe normal aspect of sedimentation. Similarly, the fauna of themarine Trias is the standard for comparison with the life of othergeological systems. The term Trias—indicative of the t
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