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Diatreme: Agathla Peak, Arizona
Diatreme: Agathla Peak, Arizona. An eroded volcanic neck. (170331-25)
Download ImageDiatreme: Agathla Peak, Arizona (vertical)
Diatreme: Agathla Peak, Arizona. An eroded volcanic neck. (170331-23)
Download ImageErosion of siltstone and shale, Arizona
Erosion of siltstone and shale of the Chinle Formation, northern Arizona (170331-8)
Download ImageSunset Crater and aa basalt, Arizona
Sunset Crater cinder cone and aa basalt, Sunset Crater National Monument, Arizona (170330-40)
Download ImageSunset Crater and aa basalt, Arizona
Sunset Crater cinder cone and aa basalt, Sunset Crater National Monument, Arizona (170330-36)
Download ImageNormal faults in Peach Springs tuff, Arizona
Conjugate normal faults in Miocene Peach Springs tuff, northern Arizona (170330-22)
Download ImageBadlands erosion in unconsolidated sediment, CA
Badlands erosion in unconsolidated sediment, California (170330-3)
Download ImagePt. Reyes California and San Andreas Fault
Aerial view of Pt. Reyes, California and Tomales Bay, site of the San Andreas fault (170328-6)
Download ImagePt. Reyes California and San Andreas Fault (vertical)
Aerial view of Pt. Reyes, California and Tomales Bay, site of the San Andreas fault (170328-5)
Download ImageFolded radiolarian chert, Marin Headlands, CA
Folded Jurassic-Cretaceous ribbon chert and interbedded shale of the Franciscan Assemblage at Marin Headlands, California. (170326-41)
Download ImageStrike-slip duplex (interpreted)
Strike-slip duplex (interpreted) in Jurassic turbidites. Southern BC, Canada. (4512-56e)
Download ImagePillar of gneiss (vertical)
Climbers on gneissic pillar, Catalina Mountains, Arizona (190127-20)
Download ImagePillar of gneiss
Climbers on gneissic pillar, Catalina Mountains, Arizona (190127-18)
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spring-fed pools in canyon, AZ (vertical)
spring-fed pools in Bear Canyon, Catalina Mountains, Arizona (190127-10)
Download ImageMylonitic gneiss of the Catalina Mountains, AZ
Mylonitic gneiss of the Catalina-Rincon Mountains metamorphic core complex, Arizona (190127-8)
Download ImageView northwest to the Catalina Mountains, Arizona
View northwest to the Catalina Mountains, Arizona over the Sonoran Desert from Saguaro National Park East, Arizona (190125-126)
Download ImageFeldspar augen in mylonitic gneiss
Feldspar augen in mylonitic gneiss, Catalina-Rincon metamorphic core complex, Arizona (190125-124)
Download ImageFeldspar augen and lineations in mylonitic gneiss
Feldspar augen and stretching lineations in mylonitic gneiss, Catalina-Rincon metamorphic core complex, Arizona. Note that the handlens is dangling over the xz plane, whereas the lineations are on the xy plane. (190125-121)
Download ImageFeldspar augen in mylonitic gneiss
Feldspar augen in mylonitic gneiss, Catalina-Rincon metamorphic core complex, Arizona (190125-115)
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