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Block faulting - ridges produced by tilting of blocks.

Block Faulting

Block faulting - ridges produced by tilting of blocks.

"In architecture, an ornamental finishing, either carved in stone, or of tiles running along the top of a wall, or the ridge of a rood. Crest-tiles, or Crease-tiles, are frequently in the form either of small battlements or Tudor flowers, as in the accompanying illustration from Exeter Cathedral." — Chambers' Encyclopedia, 1875

Crest-Tiles

"In architecture, an ornamental finishing, either carved in stone, or of tiles running along the top…

The gothic cresting border is a design that is found on the ridge or the top of a roof. Popular in France it is mostly a design of perforated work with the top having a varied mass shape.

Gothic Cresting Border

The gothic cresting border is a design that is found on the ridge or the top of a roof. Popular in France…

The graeco-italic cresting border is a valence-like border on the ridge or top of a roof. It has a downward growth design.

Graeco-Italic Cresting Border

The graeco-italic cresting border is a valence-like border on the ridge or top of a roof. It has a downward…

The graeco-italic cresting border is a valence-like border on the ridge or top of a roof. It has a downward growth design.

Graeco-Italic Cresting Border

The graeco-italic cresting border is a valence-like border on the ridge or top of a roof. It has a downward…

This modern french cresting border is a design found in the castle of Pierrefonds in France. It is found on the ridge or top of a roof.

Modern French Cresting Border

This modern french cresting border is a design found in the castle of Pierrefonds in France. It is found…

This modern french cresting border is found in Cour de Cassation (French Judiciary court) in Paris, France. It is found on the ridge or top of roof.

Modern French Cresting Border

This modern french cresting border is found in Cour de Cassation (French Judiciary court) in Paris,…

This modern German cresting border was designed by Gropius of Berlin an Architect. It is found on the ridge or top of a roof.

Modern German Cresting Border

This modern German cresting border was designed by Gropius of Berlin an Architect. It is found on the…

The modern gothic cresting border is made out of cast-iron. It is a design popular in France that is found on the ridge or the top of a roof. The design is a perforated work with a top having a varied mass shape.

Modern Gothic Cresting Border

The modern gothic cresting border is made out of cast-iron. It is a design popular in France that is…

A Cuesta is a scarped ridge formed when one slope is steep and the other gentle, if one slope is a dip slope.

Cuesta

A Cuesta is a scarped ridge formed when one slope is steep and the other gentle, if one slope is a dip…

A Hog's Back is a ridge where the crest is very rounded.

Hog's Back

A Hog's Back is a ridge where the crest is very rounded.

"A screw is a cylinder, generally made of wood or metal, with a spiral ridge (the thread) winding about its circumfrence. The thread works in a nut, withihn which there is a corresponding spiral groove to receive the thread." -Avery 1895

Screw press

"A screw is a cylinder, generally made of wood or metal, with a spiral ridge (the thread) winding about…

The left trapezium as seen from the front.

Trapezium

The left trapezium as seen from the front.