GeoTours is a collection of self-guided roadside geology trips for the layperson. No previous earth science knowledge or experience is required. This is a new addition and is still VERY incomplete. Check back often for enhancements and additions.
If this is your first GeoTour, or if you feel the need for a bit of general information on the earth sciences, please spend some time in the background section.
Click here to go to the background section.
The Josephine Ophiolite
The Regional Geologic and Tectonic Setting
The Smith River section
The Turner-Albright Sulfide deposit
The Galice section
Closing Comments and Feedback
Onion Camp - almost ready
The I-5 Corridor - coming soon to a computer screen near you
The California border to Grants Pass
Grants Pass to Roseburg
The Interior of the Earth
The 4 states of matter
Density and specific gravity
The interior of the earth
Brittle-Ductile Transition Zone
What is bedrock?
Mafic vs. felsic (minerals, magma, and rock)
What is Bowen's Reaction Series?
Oxygen, silica, and the earth's crust
Why is feldspar important?
Name five common rock-forming minerals.
The 3 basic types of rocks
Igneous Rocks: Composition and texture
How come some dikes have smaller crystals on their edges?
Summary of Igneous Rock types
What are the most important types of rock in the crust?
Ultramafic and mafic rocks
Tectonics: Click here to jump to a general tectonic overview
Plate Tectonics overview
Characteristics of plate boundaries
Active and passive continental margins
What causes the plates to move?
If Mt. St. Helens and the whole west coast is a convergent plate boundary with subduction, how come there are no volcanoes along the San Andreas fault?
Cratons and greenstone belts
What is a continental basement?
What are pyroclastic flows?
Geologic Time and Earth History
Immensity of geologic time
Absolute vs. Relative Geologic Time
What is a stratigraphic column?
The Scientific Method
Regional vs. local considerations
The "laws" of geology
Strickler's Laws of GeoFantasy
The Uncertainty Factor and GeoFantasy
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