Andesitic dike, New Zealand

dyke, intrusion

Hydrothermal spring and deposits, New Zealand

hydrothermal precipitation, metals, volcanic hazards

Hoodoo and breaking wave, New Zealand

erosion

Active volcanic crater, New Zealand

steam vents, fumaroles, gas, volcanic hazards

Volcanic Island, New Zealand

volcanic island, volcanic hazards

Basalt columns and seastack, New Zealand

columns, columnar, colonnade

Desert wash, Death Valley, CA

alluvium, sand, gravel, cobbles, angular, deposited sediment

Meander loop, New Jersey

meandering

Columnar-jointed basalt, Oregon

lava, dwshed, columns, columnar, colonnade

Dinosaur footprint-Cretaceous Ornithopod (square)

trace fossils

Dinosaur tracks-Cretaceous Ornithopods

trace fossils

Wanapum Basalt and scablands, Washington

CRBG, columns, columnar, colonnade

Hand samples of metamorphic rocks

hand specimens, metamorphism

Colonnade in basalt flow, Oregon

columnar jointing, volcanic, lava, dwshed, columns, columnar, colonnade

Thrust fault and fold

Right-lateral faults

intrusive, intrusion