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Fault Displacement Markers 2 (Cross-section -Stratigraphy (Match rock…
Fault Displacement Markers 2
Cross-section -Stratigraphy
Timescale: hydreds kyr - Myr (geological)
Match rock units either side of faults
measure dip/dip direction
measure offset extent
data fault displacements if sed markers in basins
Displacements up to 2 km observed in Fucino Fault, Appenines
Displacement obv from stratigaphy
Exhibit similar patterns to those displacements measured from 18 kyr
Exhibit fault development & linkage in Appenines
5. River Profile Analysis
Timescale: 10^5-10^6 (hundreds kyr to Myr)
Inactive fault segments
Concave-up river profiles
∴ No perturbation to river
Active/ accelerated fault
e.g. Fiamignano
exhibit convexity in river profile i.e. knickpoint
Contrasting River Profiles
across:
Accelerating/
active faults
Evidenced by fault scarps
Knickpoints/knickzones found on rivers crossing these faults
Convexities/steepenings signal
equilibration to accelerated fault displacement
e.g. Fiamignana, Fucino faults
Inactive fault segments
Concave-up river profiles
Suggest no perturbation / change of throw rates
e.g. Rieti fault