| 1. | Schistosity is developed parallel to the axial plane of the folds.
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| 2. | They are likewise repeated by inverted folds, the axial planes being usually inclined to the southeast.
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| 3. | The orientation of a fold axial plane is measured in strike and dip or dip and dip direction.
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| 4. | Based upon their orientation to the axial planes and axes of folds, the types of systematic joints are:
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| 5. | Geometrically the vergence is determined with respect to the up-dip direction of the axial plane of the fold.
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| 6. | The "'transverse plane "'is perpendicular to the axial plane and to the pitch plane.
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| 7. | Measurement of the intersection between a fold's axial plane and a surface on the fold will provide the fold plunge.
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| 8. | However, the chemical plane rather than the axial plane, and thus would also lead to greater stability in the molecule.
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| 9. | For example, an F 2 fold, with an S 2 axial plane foliation would be the result of a D 2 deformation.
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| 10. | The axial plane will physically coincide with the axial plane foliation, if folding deformation of the rock is sufficient to cause a foliation.
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