Longmyndianadj.n.
/lɒŋˈmɪndɪən/, U.S. /ˌlɔŋˈmɪndiən/, /ˌlɑŋˈmɪndiən/ Geology.
A. adj.
Designating a thick series of Late Precambrian sedimentary rocks whose main outcrop forms the hills of the Long Mynd in southern Shropshire.
ΘΚΠ
the world > the earth > structure of the earth > age or period > stratigraphic units > [adjective] > pre-Cambrian > specific
Huronian1854
Lewisian1859
Archaean1872
Torridon1873
Keweenawan1876
Pebidian1877
Malvernian1879
Longmyndian1887
Torridonian1893
Moinian1938
Laxfordian1950
1856 Q. Jrnl. Geol. Soc. 12 248 It is impossible to regard them as anything but a part of the Longmynd series.]
1887 Rep. Brit. Assoc. Advancem. Sci. 1886 662 The basement beds of this series rest unconformably upon all the older rocks of the district—upon the so-called Uriconian, Longmyndian, Wrekin quartzite, and Shineton shales.
1888 C. Callaway in Trans. Shropshire Archæol. & Nat. Hist. Soc. 11 240 The Longmyndian conglomerates are largely derived from the Uriconian.
1929 J. W. Evans & C. J. Stubblefield Handbk. Geol. Great Brit. iii. 20 The outcrop of the Longmyndian Rocks at Church Stretton forms the wild, moorland tract called the Longmynd.
1967 D. H. Rayner Stratigr. Brit. Isles ii. 45 The structures in the Longmyndian pediments..suggest strongly that the western part of the Wentnor outcrops are inverted.
B. n.
The Longmyndian series of rocks.
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1969 G. M. Bennison & A. E. Wright Geol. Hist. Brit. Isles iii. 67 The Longmyndian is in the form of a very large syncline.
2010 J. P. Rafferty Geochronol., Dating & Precambrian Time iii. 225 The Western Longmyndian consists of the Wentnor Series, purple sandstones, conglomerates, and some greenish siltstones and shales.
This entry has been updated (OED Third Edition, June 2016; most recently modified version published online March 2022).
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adj.n.1887