What's happening with the columnar basalts in this roadcut on Marys Peak?
See if you can interpret the geologic history of what's on display here.
Previously GigaPanned in August 2009: www.gigapan.com/gigapans/32355
West of Manzanita Lake, Lassen Volcanic National Park.
Lassen Volcanic National Park
Box Canyon, Mecca Hills
Not so obvious, as it's tonalite on tonalite, but see if you can find it.
Peninsula Ranges Batholith
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