Syncline: Difference between revisions
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[[Image:Syncline.JPG|thumb|400px|Road Cut near Ft. Davis, TX showing a Syncline. Photographed by Eric S. Kounce on October 29, 2006]] |
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[[Image:Anticline.jpg|thumb|250px|Anticline with syncline on the right - USGS]] |
[[Image:Anticline.jpg|thumb|250px|Anticline with syncline on the right - USGS]] |
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In [[structural geology]], a '''syncline''' is a downward-curving [[Fold (geology)|fold]], with layers that [[Strike and dip|dip]] toward the center of the structure. On a geologic map (or "in map view"), synclines are recognized by a sequence of [[Rock (geology)|rock]] [[stratum|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 (geology)|basin]]. A notable syncline is Wyoming's [[Powder River Basin]]. Folds typically form during crustal deformation as the result of compression that accompanies [[Orogeny|orogenic]] mountain building. |
In [[structural geology]], a '''syncline''' is a downward-curving [[Fold (geology)|fold]], with layers that [[Strike and dip|dip]] toward the center of the structure. On a geologic map (or "in map view"), synclines are recognized by a sequence of [[Rock (geology)|rock]] [[stratum|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 (geology)|basin]]. A notable syncline is Wyoming's [[Powder River Basin]]. Folds typically form during crustal deformation as the result of compression that accompanies [[Orogeny|orogenic]] mountain building. |
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Revision as of 23:16, 31 October 2006
In structural geology, a syncline is a downward-curving fold, with layers that dip toward the center of the structure. On a geologic map (or "in map view"), 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. A notable syncline is Wyoming's Powder River Basin. Folds typically form during crustal deformation as the result of compression that accompanies orogenic mountain building.
See also
- Anticline
- Ridge-and-valley Appalachians — With good bird's eye photo of a range of the types