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Are these interesting questions?
• What is structural geology?
– Describe the structure
– Work out the history of deformation & the rest
– Formulate models for the processes involved
• What is a model?
– Von Neumann’s definition: a mathematical construct, closed, that
works; specific or more general
– J. B. Thompson, Jr.’s notion (as remembered vaguely): “Petrologists
look at rocks, make rocks, and think about rocks.”
– Narrative versus model construction & application
• What is not a model?
– Analog model of a structure (“make a rock”)
– Numerical model, as by FEM: simulation based on a model
Examples of models
It isn’t even wrong!
Wolfgang Pauli
Gilbert (1877) Report on the geology of the Henry Mountains
*Anderson (1937) The dynamics of sheet intrusions
*Ode (1957) Mechanical analysis of the dike pattern of the Spanish Peaks area, Colorado
113
Muller & Pollard (1977) Stress state near Spanish Peaks, Colorado determined from a dike pattern
83
Biot (1961) Theory of folding of stratified viscoelastic media and its application to ….
358
Sherwin & Chapple (1968) Wavelengths of single layer folds – a comparison between theory and observation
Reches & Johnson (1977) Development of monoclines: Part II Theoretical analysis of monoclines
174
Pollard & Johnson (1977) Mechanics of growth of some laccolithic intrusions in the Henry Mountains 165
*Chapple (1978) Mechanics of thin-skinned fold and thrust belts
402
*Platt (1986) Dynamics of orogenic wedges and the uplift of high pressure metamorphic rocks
879
*Platt (1993) Mechanics of oblique convergence
70
*Fisher & Brantley (1992) Models of quartz overgrowth and vein formation: deformation and episodic fluid flow
in an ancient subduction zone
116