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- Q245586 subject Q7034677.
- Q245586 subject Q7163795.
- Q245586 subject Q8343789.
- Q245586 abstract "In geology, cyclothems are alternating stratigraphic sequences of marine and non-marine sediments, sometimes interbedded with coal seams. Historically, the term was defined by the European coal geologists that worked in coal basins formed during the Carboniferous and earliest Permian periods. The cyclothems consist of repeated sequences, each typically several meters thick, of sandstone resting upon an erosional surface, passing upwards to pelites (finer-grained than sandstone) and topped by coal.Depositional sequences have been thoroughly studied by oil geologists using geophysical profiles of continental and marine basins. A general theory of basin-scale deposition has been formalized under the name of sequence stratigraphy.Some cyclothems might have formed as a result of marine regressions and transgressions related to growth and decay of ice sheets, respectively, as the Carboniferous was a time of widespread glaciation in the southern hemisphere. A more general interpretation of sequences invokes Milankovitch cycles.".
- Q245586 thumbnail Cyclothems.jpg?width=300.
- Q245586 wikiPageExternalLink geonote2.shtml.
- Q245586 wikiPageWikiLink Q1069.
- Q245586 wikiPageWikiLink Q12599.
- Q245586 wikiPageWikiLink Q13085.
- Q245586 wikiPageWikiLink Q133738.
- Q245586 wikiPageWikiLink Q134783.
- Q245586 wikiPageWikiLink Q1732190.
- Q245586 wikiPageWikiLink Q180184.
- Q245586 wikiPageWikiLink Q211446.
- Q245586 wikiPageWikiLink Q24489.
- Q245586 wikiPageWikiLink Q301920.
- Q245586 wikiPageWikiLink Q347379.
- Q245586 wikiPageWikiLink Q49367.
- Q245586 wikiPageWikiLink Q660019.
- Q245586 wikiPageWikiLink Q7034677.
- Q245586 wikiPageWikiLink Q7163795.
- Q245586 wikiPageWikiLink Q76402.
- Q245586 wikiPageWikiLink Q8343789.
- Q245586 wikiPageWikiLink Q876798.
- Q245586 comment "In geology, cyclothems are alternating stratigraphic sequences of marine and non-marine sediments, sometimes interbedded with coal seams. Historically, the term was defined by the European coal geologists that worked in coal basins formed during the Carboniferous and earliest Permian periods.".
- Q245586 label "Cyclothems".
- Q245586 depiction Cyclothems.jpg.