Other field trips

Trilobite fragment (probably Ollenoides serratus), Walcott Quarry member of the Burgess Shale, British Columbia


Rotated tension gash in the contact aureole of the Inyo Batholith, White-Inyo Mountains, California


Intrusive breccia in the mixing zone of the 149 Ma Guadalupe Igneous Complex, Sierra Nevada, California


Ball-and-pillow features alongside flame structure in the mixing zone of the Guadalupe Igneous Complex, Sierra Nevada


Boudinage in mylonite shear zone near the base of the Guadalupe Igneous Complex, Sierra Nevada


Ladder dike in the Half Dome Granodiorite, Yosemite —

Detail of ladder dike in the Half Dome Granodiorite, Yosemite


Nearly circular mafic enclave in the Half Dome Granodiorite, Yosemite


Glacially-carved granite domes near Tenaya Lake, Yosemite


Tufa, Mono Lake, California


Intricate fluting and spatter on the wall of a lava tube, Raufarhólshellir, Iceland


Ice stalgmites in Raufarhólshellir lava tube, Iceland


Intrusive breccia at Island Lake, Sierra Nevada


Large orthoclase crystals in pegmatite near Island Lake, Sierra Nevada. Camera filter is 4 cm for scale.


Glacially-polished columnar jointing, Devil’s Postpile, California


Meter-scale columnar jointing in the main flow of the Bishop Tuff, Owens Valley, California


Airfall ash and pumice from the Bishop Tuff, Owens Valley, California


Students climb one of the tallest sand dunes in North America - Eureka Dunes, Death Valley


Colorful stratigraphy of the Kingston Peak Formation, Beck Canyon, California


Meter-wide magnetite veins cutting the Beck Springs Dolomite, Beck Canyon, California


Detail of magnetite vein cutting the Beck Springs Dolomite, Beck Canyon, California


Intricate contact of magnetite with surrounding dolomite, Beck Canyon, California


Comb layering in the Adamello Pluton, Italian Alps.


A magmatic contact between tonalite and enclave-rich granodiorite is offset by a magmatic shear zone, Adamello Pluton, Italy


Ductile marble flows around fractured and offset quartzite in the metamorphosed sedimentary section south of the Adamello pluton, Italy


Vesicle escape tubes in the Taos Plateau Basalt, Rio Grande Rift, New Mexico


Large modern dessication cracks, Argentine Precordillera


Syn-rift sediments, Argentine Precordillera


Colorful syn-rift sediments in the foreground of the main Andean Cordillera, Argentina