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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.
ALT Conceptual three-dimensional models of drift-related failure. Contourite drifts around carbonate platforms fail on gentle gradients, whereas drifts on siliciclastic slopes fail at higher dip-angles.
ALT A detailed, colored topographic map of the lower section of the Selinda River shows in deep blue the strong incision linked to the upstream propagation of the knickpoints. Below are details of high-resolution satellite images showing moving hydraulic dunes in the Selinda River, characterizing sediment erosion and transport due to the ongoing incision.
ALT Photo of a mountain peak covered in snow and surrounded by aspens with autumnal, yellow leave. Taken near Ridgeway, CO (Photo by Thomas Morse on Unsplash).