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Development of concentric ridges in synclines. A) a region with synclinal or canoe-shaped folds. B) The synclinal valley shown in A is replaced by a mountain because of the occurrence of a hard stratum in the center.

Concentric Ridges in Synclines

Development of concentric ridges in synclines. A) a region with synclinal or canoe-shaped folds. B)…

Eroded syncline.

Eroded Syncline

Eroded syncline.

An overthrust anticline of a strata fold.

Overthrust Anticline Folds

An overthrust anticline of a strata fold.

An overthrust anticline of a strata fold.

Overthrust Anticline Folds

An overthrust anticline of a strata fold.

"A syncline is a downfolding of the strata in the form of a trough, as at a...An anticline is an upfolding of the strata in the form of an arch, as at b." -Dryer, 1901

Strata Folds

"A syncline is a downfolding of the strata in the form of a trough, as at a...An anticline is an upfolding…

Isoclinal folds, restoration as two anticlines and a syncline.

Isoclinal Fold

Isoclinal folds, restoration as two anticlines and a syncline.

Isoclinal folds, restoration as two synclines separated by an anticline.

Isoclinal Fold

Isoclinal folds, restoration as two synclines separated by an anticline.

"At 1, a series of compressed folds has been worn down to a plain, the surface of which is formed by the edges of the nearly vertical strata. At 2 an anticline has been reduced to a valley, and at 3 a syncline is left standing as a ridge made up of concave strata like a pile of platters. The ridges at 4 are projections of hard strata above the more easily eroded ones on either side." -Dryer, 1901

Appalachian Mountains

"At 1, a series of compressed folds has been worn down to a plain, the surface of which is formed by…

Cross-sections of shallow basins, separated a) by a simple anticline, b) by two anticlines and a syncline.

Shallow Basins

Cross-sections of shallow basins, separated a) by a simple anticline, b) by two anticlines and a syncline.

"Sterogram of Jura Mountains...The Jura Mountains in France and Switzerland consist of a series of parallel ridges and valleys in which each ridge is an anticline and each valley is a syncline." -Dryer, 1901

Mountain Sterogram

"Sterogram of Jura Mountains...The Jura Mountains in France and Switzerland consist of a series of parallel…

Synclinal strata is a geological fold downwards.

Synclinal Strata

Synclinal strata is a geological fold downwards.

A synclinorium is a large syncline with superimposed smaller folds.

Synclinorium

A synclinorium is a large syncline with superimposed smaller folds.