| 释义 |
Rhætic, a. and n.|ˈriːtɪk|
Also Rhe-.
[ad. L. Rhætic-us, adj. of Rhætia, ancient name of a district of the Alps.]
A. adj.
1. Geol. Applied to strata, extensively developed in the Rhætian Alps, regarded as passage-beds between the lias and trias; belonging to or characteristic of these.
The Rhætic beds lie between the Keuper series of the Upper Triassic and the Liassic of the Lower Jurassic. They have been assigned variously to the Triassic and (esp. in Britain) to the Jurassic, and also to form a separate system between the two; they are now regarded as forming a series of the Triassic.
1861Q. Jrnl. Geol. Soc. 22 May 496 The Kössen stage, or, as it is now proposed to be termed by Mr. Gümbel the State-Geologist of Bavaria, the Rhætic formation,—a designation recognized by Professor E. Suess. 1896Guide Fossil Rept. Brit. Mus. 103 Semionotus and Colobodus are Triassic and Rhætic;..and Lepidotus ranges from the Rhætic to the Wealden. 1904[see non-sequence]. 1909[see ophiolitic a.]. 1969Bennison & Wright Geol. Hist. Brit. Isles xii. 279 The Rhaetic Beds, not exceeding 100 feet thick.., are important as a datum of reference at the top of the Triassic and can be presumed to be approximately contemporaneous throughout the outcrop. 1980Daily Tel. 7 Apr. 8/8 Derived fossils from the Avon gravels are also among the gift with vertebrate remains from the Rhaetic Bone Bed at Aust Cliff including 34 teeth of the lung fish.
2. Also Rætic. Of the ancient Rhætic language.
1948D. Diringer Alphabet ii. ix. 501 The Raetic and other Alpine alphabets. 1952Archivum Linguisticum IV. 87 Rhetic and Pyrenean scholars.
B. n.
1. Geol. The Rhætic formation; the epoch during which the strata were deposited; in pl., Rhætic series of strata.
1881Nature 15 Sept. 474/2 The green marls agreed with underlying beds in the Keuper, but differed markedly from the overlying Rhætics. 1896[see A. above]. 1948R. L. Sherlock Permo-Triassic Formations ii. 244 Since most of the vulcanism took place in the Rhaetic, which we regard as Jurassic, it need not be described here, but the fact has an important bearing on the correlation of Gondwana Strata. 1963[see Rhæto-Liassic a.]. 1971B. W. Sparks Rocks & Relief x. 334 In the Alps of eastern Switzerland, ammonites found in the Rhaetic are more closely related to Triassic than to Jurassic forms.
2. Also Rætic. An ancient language of the Rhætian Alps and the area to the south of them.
1933J. Whatmough in R. S. Conway et al. Prae-Italic Dial. Italy II. 4 Arrian (Tact. 44) distinguishes explicitly between Raetic spoken by the Raeti, and Keltic spoken by the Kelts, as late as the time of Hadrian. 1939L. H. Gray Foundations of Lang. xi. 332 It is generally agreed that it [sc. Illyrian]..was connected with at least two ancient Italic dialects: Venetic..and Messapic..and to these we may perhaps add Raetic, with some sixty fragments. 1974R. A. Hall External Hist. Romance Langs. iii. 51 Among those [pre-Italic dialects of Italy] commonly considered to be Indo-European.. are..Rhaetic, in the Alps north of present-day Venetia, Lombardy, and Piedmont, and perhaps in the Po valley before the coming of the Etruscans..and of the Gauls. 1977Canad. Jrnl. Linguistics Spring 31 The Early Italic dialects of Celtic, Ligurian, Lepontic, Raetic, and Venetic. |