ALT Schematic three-dimensional blocks and paleogeographic schematic maps showing evolution of the Frontenac Arch from Cambrian to present, illustrating deposition, burial, cooling, erosion, fault reactivation, and exhumation.

ALT A living Enallopsammia sp. coral colony at 1345 m water depth on Zhangzhong Seamount, South China Sea.

ALT Color-coded sketch illustrating the spatial distribution of sedimentary and volcanic lithofacies on a seamount with a large volcaniclastic slope apron approaching a trench. Yellow to beige colors represent the trench-fill lithofacies. Green, purple, and blue colors represent the volcanic strata of the ocean plate lithofacies. Black, gray, and red colors represent the pelagic sedimentary strata of ocean plate lithofacies.

ALT Cartoon showing infiltration of fluid into blocks, some of which grow garnet during fluid-rock interaction. Garnet growth can facilitate trapping of heavy rare earth elements from the fluid or local redistribution, depending on fluid composition.

ALT Colorful geologic map of Colorado highlighting selected geo-sites in the Denver area and across the state.

ALT Six photographs showing examples of the bone damage and bone modification on fossils found at the Dead Elephant site.

ALT Three photographs documenting the Poty Quarry section, including the outcrop and sampling methods.

ALT Geologic map of the Laramie anorthosite complex showing Red Mountain pluton and surrounding rock units in Wyoming.

ALT Geologic map of Manitou Springs, Colorado, showing bedrock units, faults, and locations of the area's mineral springs.

ALT Weighted mean date diagram for the Rak Tuff exposed in Owl Canyon (Sample MHT-12) with accompanying Tera-Wasserburg concordia diagram and representative cathodoluminescence images of dated zircon crystals.

ALT Graphic for The Geological Society of America titled "Going above and beyond: Announcing the 2026 Outstanding Associate Editors!" set against a desert landscape with dramatic rock formations lit by warm sunlight under a deep blue sky with a full moon.

ALT The big blue bear looking in through the windows of the Colorado Convention Center

ALT Image showing the CampGeo logo, Roadside Geology of Colorado, and Colorado Rocks!

ALT Stylized Earth with glowing green-colored outline against a starry black background. Varying shades of brown, blue, and white in addition to ice and a body of water are visible in an aerial NASA image. Bold black text with green outline reads "Geosphere" across the planet.

ALT Gray-scale scanning electron microscope image of a glacigenic quartz grain recovered from clastic sediments

ALT Field and reflected-light images of wolframite-quartz veins hosted by the Hukeng granite of the Wugongshan Complex.

ALT Diagram showing wildfire biogeomorphology linking biological and geomorphic processes, climate change, and human activities.

ALT Ad graphic with information about 2026 workshop, including date, time, and location.