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cyclothem
cyclothem n. 
/ˈsɪkləθɛm/, /ˈsɪkləˌθɛm/ [Greek θέμα something laid down (see theme n.)] Geology see quot. 1932.
Brit. /ˈsʌɪkləθɛm/
, /ˈsʌɪkləθɛm//ˈsɪkləθɛm/U.S. /ˈsaɪkləˌθɛm/
, /ˈsaɪkləˌθɛm//ˈsɪkləˌθɛm/ΘΚΠ
the world > the earth > structure of the earth > age or period > stratigraphic units > [noun]
series1799
system1823
terrain1823
stage1859
group1865
section1882
horizon1926
cyclothem1932
succession1940
range zone1957
1932 Wanless & Weller in Bull. Geol. Soc. Amer. XLIII. 1003 The word ‘cyclothem’ is..proposed to designate a series of beds deposited during a single sedimentary cycle of the type that prevailed during the Pennsylvanian period.
1957 Encycl. Brit. IV. 844/1 Coals are more important than limestones in identifying cyclothems because most cyclothems include only one coal whereas two or more limestones may occur.
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- sub-preparatory
- sub-presentive
- sub-primary
- sub-prioress
- sub-process
- sub-processes
- sub-proctor
- sub-proctorship
- sub-product
- sub-products
- sub-professoriate
- sub-proprietor
- sub-protector
- sub-protector of aborigines
- sub-protector of the aborigines
- sub-provincial
- sub-pulveration
- sub-pulverizer
- sub-purchaser
- sub-quality
- sub-question
- sub-race
- sub-railway
- sub-rational
- sub-reader