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EAS G700 Graduate Level Field Seminar
Syllabus and Goals

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syllabus & goals

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course goals

1Construct several laterally consistent balanced x-sections to form the framework for a 3D structural model.

2Build a 3D structural model in 3DMove that incorporates the surface geology, subsurface geology and relevant geology that has been eroded (the model will include the Mississippian – Upper Cretaceous)

3Restore the 3D model to answer the following questions:

4Outline at least one publication that will be written from the study and define post‐seminar responsibilities for the publication(s)

Each student will balance at least one x-section, build a 3D model and restore the 3D model.

course syllabus
study area

Cross Section Priorities

Mandatory x-sections

  1. 1. Western hangingwall and footwall ramps with Je syncline in the main thrust horse.
  2. 2. Hangingwall, "mystery hill" in the main thrust horse and the southern thrust sheets.
  3. 3. Hangingwall, the east fault cut-off of the main thrust horse and eastern exposure of the southern thrust sheets.
  4. 4. East Pp limb of J and footwall cutoff of Kkg.
  5. 5. West flank of Kk syncline, east side of Jm fishtail and very low angle footwall ramp.
  6. 6. East end of Kk syncline, Kc footwall cutoff, full thickness of Kk in footwall.
  7. 7. Jefferson River cut x-section.
  8. 8. W-E line through center of Pp J and both flanks of Kk syncline. Mostly done in classroom from map and x-sections 1-6; some field checking.
  9. 9. W-E line along main fault outcrop (down-plunge projection of map). Mostly done in classroom from map and x-sections 1-6; some field checking.

Optional x-sections if we have 12 students

  1. 10. Eastern foothills (footwall only?).
  2. 11. Northern flank of J-fold through Kkg hangingwall cutoff.
  3. 12. West side of Jefferson River.
  4. 13. Tie-in to Sappington measured stratigraphic section traverse.
course schedule

Before arriving: Preread assignments (geology of the IUGFS area, balancing cross sections and 3D modeling software docs)

Day 0: Arrive at IUGFS by 6:00 pm for introductions, safety briefing, course goals and schedule discussion

Day 1: (FS) Hwy 2 map, x‐section topo profiles, stratigraphy and formation thicknesses, define field teams, define each team’s work assignments, introduction to the software and workflows.

Day 2: (field) Field introduction to the stratigraphic units and reconnaissance of the structural geology

Day 3: (field) Each team collects field data for their first dip x-section and starts building that x-section.

Day 4: (FS) Cross-team agreement on lateral consistency and preliminary balancing the first x-sections

Day 5: (field) Each team collects field data for their second dip x-section and starts building those x-sections, one team also does Jefferson River cut x-section.

Day 6: (FS) Cross-team agreement on lateral consistency of all dip x-sections and near-final balancing of dip x-sections.

Day 7: (FS and field) Build strike x-sections, agree on 3D consistency, field checking to resolve any questions or disputes.

Day 8: (FS) 3D model building.

Day 9: (FS) Finish 3D model building and start 3D reconstruction.

Day 10: (FS) Finish 3D reconstruction, interpret what it means and identify of any pitfalls in the logic.

Day 11: (field) Summarize interpretation results, walk through field area to discuss the interpretation.

Day 12: (FS) Define publication ideas, outline each publication, assign post-course responsibilities, adjourn by 4:00 pm Depart IUGFS either the evening of Day 12 or the following morning.

contact information

department of earth and atmospheric sciences
indiana university
1001 e. 10th st. bloomington in 47405

phone: 812-855-1475

email: iugfs@indiana.edu

field station address:
633 s. boulder road, cardwell, montana 59721
phone: 406-287-3323