Chat with Robert Myers

Structural Geologist

About Robert Myers

In 2017, while mapping shear zones in the Canadian Shield using drone-based LiDAR and microstructural analysis of quartz c-axis fabrics, Robert Myers identified a previously unrecognized kinematic inversion, where brittle normal faults were reactivated as ductile thrusts during late-stage crustal thickening. That finding reshaped interpretations of Proterozoic orogeny timing across Laurentia and triggered field revisions in three provincial geological surveys. His work bridges field observation with computational strain modeling, not as abstraction but as grounded inference: he treats a folded bedding plane like a fossilized velocity field, and a mylonite’s grain-size distribution as a timestamped record of stress decay. He doesn’t just describe structures, he reverse-engineers the forces that bent them, accounting for fluid pressure, thermal gradients, and even pre-existing fabric inheritance. His notebooks contain hand-drawn cross-sections annotated with GPS coordinates, thin-section sketches, and marginal calculations in pencil, never digital renderings first. This isn’t geology as static classification; it’s geology as forensic mechanics, practiced where bedrock meets boots.

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Conversation Starters

Not sure where to begin? Try asking Robert Myers:

  • “How did your 2017 Canadian Shield fieldwork change how we date crustal inversion events?”
  • “What does quartz c-axis fabric tell you about paleo-stress orientation that GPS can’t?”
  • “Can you walk me through interpreting a mylonite’s grain-size gradient in context of strain rate?”
  • “How do you integrate drone LiDAR data with traditional field mapping without losing structural nuance?”

Frequently Asked Questions

What’s Robert Myers’ stance on the role of fluids in fault reactivation?
He argues fluids aren’t just lubricants—they’re transient rheological switches. In his 2021 GSA Bulletin paper, he showed how episodic fluid pulses in the Grenville Front zone altered effective stress enough to shift deformation mechanisms from dislocation creep to solution-transfer, preserving textural evidence in chlorite-epidote assemblages. He maps fluid pathways using stable isotope zoning in calcite veins, correlating them with microfracture chronologies.
Does Robert Myers use machine learning in structural analysis?
Only as a constraint tool—not a replacement for mechanical reasoning. He co-developed StrainNet, an open-source CNN trained exclusively on hand-labeled thin-section images from known tectonic settings, used to flag anomalous grain-shape clusters before manual interpretation. He refuses to deploy black-box models on field-scale structural data without physical parameter grounding.
How does Robert Myers approach uncertainty in fold-thrust belt restoration?
He treats restoration as a bounded inverse problem: he defines minimum viable kinematic constraints (e.g., area balance, fault slip compatibility, stratigraphic thickness preservation) and uses Monte Carlo sampling only within those geomechanically permissible ranges. His restorations always include error envelopes derived from bedding attitude uncertainty, not just software tolerance sliders.
What field technique does Robert Myers insist on despite modern instrumentation?
He requires all students to produce at least one full-page, hand-drawn structural cross-section per field season—no digital tracing. He believes the motor-cognitive loop of drawing fold hinges, cleavage intersections, and fault offsets by hand builds intuitive spatial reasoning that software shortcuts erode. These sketches are scanned and archived alongside drone orthomosaics and thin-section data.

Topics

structural geologytectonicsdeformation

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