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・ Synclera jarbusalis
・ Synclera nigropenultimalis
・ Synclera retractilinea
・ Synclera rotundalis
・ Synclera seychellensis
・ Synclera stramineatis
・ Synclera subtessellalis
・ Synclera tenuivittalis
・ Synclera tibialis
・ Synclera traducalis
・ Synclera univocalis
・ Synclerostola
・ Syncletica of Alexandria
・ Synclidopus
・ Synclinal
Syncline
・ Synclitodes
・ Synclysmus
・ SyncML
・ SynCo Bio Partners
・ Syncoilin
・ Syncola
・ Syncollesis
・ Syncolostemon
・ Syncom
・ Syncomistes
・ Syncopacma
・ Syncopacma acanthyllidis
・ Syncopacma adenocarpella
・ Syncopacma adversa


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Syncline : ウィキペディア英語版
Syncline

In structural geology, a syncline is a fold with younger layers closer to the center of the structure. A synclinorium (plural synclinoriums or synclinoria) is a large syncline with superimposed smaller folds.〔Synclinorium. (2008). In Encyclopædia Britannica. Retrieved May 03, 2008, from Encyclopædia Britannica Online: http://www.britannica.com/EBchecked/topic/578375/synclinorium〕 Synclines are typically a downward fold, termed a synformal syncline (i.e. a trough); but synclines that point upwards, or perched, can be found when strata have been overturned and folded (an antiformal syncline).
==Characteristics==
On a geologic map, synclines are recognized by a sequence of rock layers that grow progressively younger, followed by the youngest layer at the fold's center or ''hinge'', and by a reverse sequence of the same rock layers on the opposite side of the hinge. If the fold pattern is circular or elongate circular the structure is a basin. Folds typically form during crustal deformation as the result of compression that accompanies orogenic mountain building.

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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