GLG510 Advanced Structural Geology

Announcements Syllabus Schedule Weekly lecture notes Links

Mecca Hills field trip


Introductory powerpoint

Study of the active fault trace with high resolution topography and imagery

Balloon photography

Full resolution
1024 pixel wide resolution

OpenTopography for high resolution DEM data
GLW how to
GLW and ArcMap
Georeferencing lecture

Rectifying and mapping

Picture of rectifying a balloon photograph
0.25 m DEM in ArcScene
6 cm rectified airphoto in ArcScene
Mapping over rectified airphoto

Assignment--Due Thursday April 2, 2009

  1. Compute DEMs on the site for the research location. Experiment with the grid computation settings for both local binning and the spline method.
  2. Rectify a subset of the balloon photography that covers the study location with the best combination of quality and coverage.
  3. Rectify your field mapping and note locations
  4. Produce a digital map of the fault traces, major geomorphic features (channels, ridges, surfaces), and identify the major offset channels
  5. Measure and quality rate as many of the offsets as possible. Quality rating should be poor, fair, good, excellent and indicate the quality of the reconstruction. The measurement should include a +/- uncertainty.
  6. Turn in:

Study of the structure of the fault zone

GIS data

These are all downloaded from
They are all zipped: 1/3 NED DEM--will need to be projected to UTM for best results DRG--7.5' topographic maps--these are the minimum to rectify your maps

GIS tasks

Rectify scanned field maps to DRGs
Click out strike and dip locations and add strike and dip values to attribute table
Format for point shapefile for strike and dips (or fold axis trend and plunges). Make sure it is in NAD27 UTM zone 11:

Digitally compile field mapping (polylines and polygons)

Analysis of structures

Folding analysis

Stereonet software: download from Rick Allmendinger site: Matlab code for stereonet plotting:
plot primitive: primitive1.m (by Don Ragan)
convert right hand rule to dip dip direction: convertrhr.m
plot great circle: greatcircle.m (by Don Ragan)
plot small circle: smallcircle.m (by Don Ragan)
plot point : plotpoint.m (by Don Ragan)
script to run it all: stereonetscript.m

Field Photos

Full resolution
1024 pixel wide resolution

Assignment--Due Thursday April 9, 2009

  1. Build GIS, rectify the field mapping
  2. Compile strike and dips for bedding, faults, foliation and point features for fold axes and deliver shapefile to group with format as indicated above to Ramón on Tuesday March 31
  3. Compile polylines and polygons representing the faults, macroscopic fold axes, contacts, etc. Use agreed upon colors/symbology. Share above with group by deadline
  4. Analyze folds and compare fold orientations with other structural orientations such as faults
  5. Geologic cross section through the mapping area (include linework in the air, maintain stratigraphic thickness where plausible, use geologic intuition and field observations to help draw features, calculate apparent dip in the plane of cross section if the structural bearing is less than 65 degrees, see also slide 31 in Introductory powerpoint). Use either Kink or Busk method, depending on which you think is better for this case. See also: Fold analysis and cross sections
  6. Turn in (avoid literature review):

Group photo

Balloon photography of our team (click for full resolution image):

GLG510 Advanced Structural Geology

Last modified: March 26, 2009