Crystalline Core with Stacia Gordon

This lecture examines the North Cascades crystalline core through the Skagit Gneiss, covering its plutonic origins, crustal depth and pressure indicators, fault restoration, rapid exhumation, and links to sedimentary basins. It discusses garnet thermobarometry, zircon age dating, and related evidence.

Syllabus

Video Start
Lecture Start
Skagit Gneiss Used to be Plutonic Rocks
Boulder Batholith 9km Uplift
How old was the plutonic material that made the Skagit Gneiss?
North Cascade - Crustal Thickness
Schedule and Eocene Papers
Dream Team Photos and Videos
How do we know the original depth and pressure of the Skagit Gneiss?
Washington Strike Slip Faults
Crystalline Core Blocks
Straight Creek Fault Restoration
Stacia Gordon
Skagit Gneiss Locations
Previous Research
Skagit Gneiss Pressure and Depth Indicators
Garnets
Zircon Age Dating
Field Photos
Cordierite Shows Fast Exhumation
Other Age Dating Methods
Crystalline Core and Sedimentary Basins
Upper Crust vs Deeper Crust Deformation
Other Core Complexes
Q&A
Next Session Preview
Roadside Geology of Washington
Toast and Goodbye