The western U.S. has had a varied and complex geologic history providing
considerable insight into tectonic processes important in earth history.
Interpretation of this history requires the integration of data and analyses
from a number of different disciplines. This course provides background
both in terms of the geologic events of the western U.S. and the techniques
and models used to infer that history. This class will include a brief description
of some of the tools of tectonics, including paleomagnetism, geobarametry,
geothermometry, geodynamic modelling, and some elements of structural geology
and stratigraphy.
Structural geology and at least one semester of college physics and
calculus are strongly recommended.
Some of the topics to be discussed include:
- Precambrian rifting event(s) (evidence from stratigraphy interpreted
with thermal subsidence models, magnetostratigraphy and isotopic tracers)
- Paleozoic passive margin to Antler/Ancestral Rocky/Ouachita tectonics
(including seismic reflection profiling, stratigraphy, and the application
of tectonostratigraphic terranes)
- the accretion of exotic terrains (paleomagnetism and tectonostratigraphy),
development of igneous batholiths (petrology and isotope geochemistry
with a dash of geophysics),
- development of a fold-and-thrust belt (structural analysis, physical
models of orogenesis),
- Laramide tectonics (stratigraphy, flexural and isostatic models, isotope
geochemistry, paleomagnetism and Baja/British Columbia),
- initiation and development of extensional tectonics (geobarometry/geothermometry,
stratigraphy, geochronology of structural elements, plate tectonic reconstructions),
- uplift of the western Cordillera (paleofloral analysis, geomorphology,
climatic considerations)
- transition from convergent to transform plate motions (plate reconstructions,
paleomagnetism, stratigraphy, reflection seismology, physical models)
- examination of hazards and ongoing deformation from the geohistorical
perspective (could involve geodesy, geophysical models, scarp dating)
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