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Folds
- 1. Ameer Hamza &Farhad Ali BS-III (Geo – Phy) Folds Presented By :-
- 2. Anticline • Anticlines areupwardly convex folded structures that form arches with the youngest (last deposited) strata • Anticlines are A-shaped structures that develop during crustal deformation as the result of compression Terminology of anticlines
- 3. Anticline • Weathered marble anticlineat General Carrere Lake, Chile • Nazca Plate Under The South American Plate • Metamorphic Strata • The Tuscarora Formation forms a clear anticline in Wills Mountain at Cumberland Narrows, Maryland • Pacific plate with north American plate • Sedimentary Strata
- 4. Syncline syncline is aconcave geological fold, with layers that dip downward toward the center of the structure. This arrangement is opposite to that of an arching anticline.
- 5. Syncline • Syncline inNavajo Sandstone • Sandstone • North American Plate • Synclinal folds in bedrock, near Saint- Godard-de-Lejeune, Canada • North America And Pacific Plate • Metamorphosed
- 6. Monocline • A monoclineis a step-like fold in rock strata consisting of a zone of steeper dip within an otherwise horizontal or gently-dipping sequence.
- 7. • Monocline atColorado National Monument • Granitic Rock • Pacific Plate • Monocline in the eastern Iran • Sedimentary Strata • Arabian Plate & Eurasian Plate
- 8. Recumbent fold • Arecumbent fold has an essentially horizontal axial plane. When the two limbs of a fold are essentially parallel to each other and thus approximately parallel to the axial plane, the fold is called recumbent fold
- 9. Recumbent fold • Recumbentfold, King Oscar Fjord GreenLand • Sedimentry • North American plate
- 10. Overturned fold • Over-turnedfold - Here the axial plane is inclined and both the limbs dip in the same direction, usually at different angles.
- 11. Overturned fold • OverturnedFold in Limestone, Wasatch Mountains, Utah, USA • Sedimentary strata • North American Plate with Pacific Plate, • Overturned anticline in the Tian Shan Mountains northeast of Kashi, China • Eurasian & Indian Plate • Sedimentary Rocks
- 12. Doubly plunging anticlinenear Chahar Gas, Iran Sedimentry Strata Arabian & Eurasian Plate
- 13. Plunging folds inAnti-Atlas Mountains near Tilemsoun, Morocco African & Eursian Plate Effects Igneous + Sedimentry Strata
- 14. Basin Near Jukan, Iran SedimentaryRocks Arabian & Eurasian Plate
- 15. Ptygmatic Fold:- Have alobate shape and look like intestines
- 16. Gold quartz veinsof the alleghany district California North American & Pacific Plate Re-crystallized Sedimentry
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