Geologic Map (modified from Harper, 1984). Numbers are field trip stops.
Josephine Ophiolite (Late Jurassic): Purple=Peridotite(mostly harzburgite with lesser dunite and
sepentinized near faults). Blue=Ultramafic Cumulates. Dark Blue-Green=Gabbro.
Light Blue-Green=Sheeted Dikes. Red-Brown=Pillow Basalts.
Other Rocks: Gold=Galice Formation(Late Jurassic slate, metagraywacke, chert, and argillite).
Bright Red=Lower Coon Mountain Pluton(142 my olivine clinopyroxenite).
Yellows=Miocene stream sand and gravel and modern alluvium.
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