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单词 molasse
释义

molassen.

Brit. /mə(ʊ)ˈlas/, U.S. /məˈlæs/, /məˈlɑs/
Forms: 1700s 1900s– mollasse (now rare), 1800s– molasse.
Origin: A borrowing from French. Etymon: French molasse.
Etymology: < French molasse, mollasse (1669, at first primarily in Swiss French, spreading to central French from the use by H. B. de Saussure in 1779), use as noun of molasse , adjective (a1630 in pierres molasses ), probably < classical Latin mollis (see moll adj. and n.1) + French -asse , augmentative suffix ( < classical Latin -ācea , feminine of -āceus : see -aceous suffix), with form altered after French (regional) mole , variant of meule millstone (see mullet n.3). Compare post-classical Latin molacia (feminine) type of sandstone (1410 in a document from Geneva; also as molaci (ablative) 1411).
Geology.
Originally (formerly also with capital initial): a deposit of soft greenish sandstone mixed with marls and fossiliferous conglomerates, of Miocene to Oligocene age, found along the northern edge of the Alps. Later also (more generally): any thick paralic sedimentary deposit formed after a period of orogeny and consisting of soft, ungraded sandstones, shales, marls, etc.
ΘΚΠ
the world > the earth > structure of the earth > constituent materials > rock > sedimentary rock > [noun] > sandstone > others
firestone1399
hassock1461
red stone1602
penistone1688
bluestone1709
gingerbread1714
brownstone1780
molasse1794
Old Red Sandstone1805
chip sand1808
fox-bench1816
New Red Sandstone1818
grey band1824
arkose1839
cankstone1845
St. Bees Sandstone1865
pietra serena1873
Ham Hill stone1889
1794 R. Kirwan Elements Mineral. (ed. 2) I. 99 Mollasse, a grey or yellowish grey stone, found in the neighbourhood of Lausanne, and various parts of France.
1827 R. Jameson tr. G. Cuvier Ess. Theory Earth (ed. 5) 97 Certain lignites and molasses do in fact contain them [sc. fossil remains of terrestrial mammifera].
1837 Edinb. New Philos. Jrnl. 22 61 [Turkey] It is only necessary to cross a small molasse hill not exceeding 300 feet in height.
1886 J. Geikie Outl. Geol. 351 The lower portions of this Molasse pertain to the Oligocene.
1914 G. A. J. Cole Growth of Europe iii. 40 The Oligocene system of Switzerland includes much of the soft yellow sands and clays known locally as molasse (or mollasse).
1965 A. Holmes Princ. Physical Geol. (rev. ed.) xxx. 1126 Related deposits also commonly occur in the depressions that develop in front of the rising mountains during the waning stages of an orogenic cycle, e.g...the molasse of the Swiss plain in front of the Alps.
1971 Nature 5 Feb. 385/1 Collision of the detached Indian and Australian blocks with Asia was marked by regression, thrusting, orogeny, and subsequent molasse deposition.
1990 P. Kearey & F. J. Vine Global Tectonics ix. 183 During Cenozoic times the Altiplano received some 15 km of molasse from the Eastern and Western Cordilleras.
1995 Chem. Geol. 119 249/2 The Sb mineralization occurs in a Paleogene mollasse formation.
This entry has been updated (OED Third Edition, September 2002; most recently modified version published online March 2022).
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