27 june 2015glg510 advanced structural geology fold analysis and cross sections
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April 18, 2023 GLG510 Advanced Structural Geology
Fold analysis and cross sections
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Marshak and Mitra
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Marshak and Mitra
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Beta diagram: fold axis at intersection of bedding planes
Marshak and Mitra
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Marshak and Mitra
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Marshak and Mitra
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Marshak and Mitra
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Cross sections
Davis and Reynolds, 2000
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Basic steps in the preparation of a geologic cross section:
1) Choose appropriate line of section
2) Produce topographic profile along it.
3) Transfer marker attitudes (contacts and within units)
4) Correct for apparent dip in line of section (if line <75 degrees from strike)
5) Draw units; maintain stratigraphic thickness where possible; use deformation patterns observed from field to guide interpretation. Continue lines into air and below groundDavis and Reynolds, 2000
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Construction: Busk method
Marshak and Mitra
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Construction: Busk method
Marshak and Mitra
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Construction: Kink band method
Marshak and Mitra
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Construction: Kink band method
Marshak and Mitra