Recumbent syncline Death Valley, CA

Aerial view of recumbent syncline in Cambrian Bonanza King Formation on Corkscrew Peak, Death Valley, California. (3174-23)

Hogbacks along edge of anticline, Utah

Aerial view of hogbacks along the edge of the Split Mountain Anticline, Dinosaur National Monument, Colorado-Utah. The red valley is the recessive Triassic Moenkopi Formation. (190925-200)

Split Mountain Anticline, Utah-Colo

Aerial view of Split Mountain Anticline and Dinosaur National Monument, a plunging fold on the Utah-Colorado border. The Green river cuts across the structure as an antecedent river. The prominent white rock is the Pennsylvanian Weber Sandstone; the red band is the Triassic Moenkopi Formation. (190925-194)

Meteor Crater, Arizona

Aerial view of Meteor Crater (Barringer Crater), Arizona –formed by the impact of a meteorite some 50,000 years ago. It measures 3900 feet in diameter and about 560 feet deep. The meteorite, called the Canyon Diablo Meteorite, was about 50 meters across. (190925-19)

Pyroclastic flows and Mt. St. Helens, WA.

Pyroclastic flows and northwest edge of Mt. St. Helens volcano, Washington. (190817-21)

4511-12e-1

metaconglomerate, NE Maine (vertical)

metaconglomerate along the Maine coast. (IP18-6775)

Cross-cutting dikes, Maine (Vertical)

Cross-cutting diabase dikes. Oldest is the light green one on left; 2nd is the darker one on the right; 3rd is the narrow dark one in the left-center. The granite country rock is in the background. (180715-122)

Diabase dike intruding metaconglomerate, NE Maine

igneous, intrusive, intrusion, mafic

Salts left by evaporation of seawater. (vertical)

Rings of salt left behind by evaporation of seawater in a small pool. (180714-109)

Granite coastline, Acadia NP, Maine

Coastline formed on Cadillac Granite, Acadia National Park, Maine. Note how the landscape is shaped by the sheeting fractures (unloading joints) in the granite. (180712-20)

Eocene Herring and palm frond

Fossilized Eocene herring and palm frond. Green River Formation, Wyoming. Fish is about 8cm long (180629-39)

Erosion of sea stack, Oregon (Vertical)

Fracture-controlled erosion of sandstone sea stack, Bandon, Oregon coast. (180616-97)

Porphyroclasts and kink bands ~20cm across

Porphyroclasts and kink bands (~20cm across) in sheared, mylonitic schist. Granitic porphyroclast near center originated as a sigma type porphyroclast (indicates top-left sense-of-shear) but was rotated by the kink band to appear like a delta-type to mistakenly indicate the opposite sense. (170401-19)

Meandering river and tidal inlet, Oregon

Aerial photo of meandering stream and tidal inlet between two sand spits, Sand Lake, Oregon. (100723-86)

Palouse Falls, Washington

Palouse Falls in eastern Washington drops more than 180 feet over lava flows of the Grande Ronde and Wanapum members of the Columbia River Basalt Group. (161012-99)

tilted fault blocks, Death Valley, California

Photo and diagram illustrating crustal extension, normal faults, and tilted fault blocks in Death Valley, California. (180311-19; d180507)

Deformed metaconglomerate

Deformed metaconglomerate. Quartzite clast in upper left is cut by 2 generations of veins. From the rock garden of Appalachian State University. (180427-2)

Seed Fern fossils-Pennsylvanian

Lower Pennsylvanian plant fossils in shale: Neuropteris, a seed fern. From the museum collection of Appalachian State University.
Image is about 10 cm across. (180427-23)

Strike-slip fault zone in sandstone –interpretation

Interpretation of rittle strike-slip fault zone in sandstone shows several right-lateral Riedel shears. (SrF-37;4512-55interp)