Mines Repository (Colorado School of Mines)
Not a member yet
21416 research outputs found
Sort by
Siderite and barite on galena with epitaxic sphalerite
No full textPhotographed by Ron Wolf.Small botryoidal brown siderite with white blades of barite on galena with sphalerite, Midnight mine, Richmond Hill, Aspen district, Pitkin County, Colorado
Channel-lobe transition zone stratigraphic architecture and supercritical-flow bedforms, Cretaceous Point Loma formation, California
No full textIncludes bibliographical references.2024 Spring.Submarine channel-fan deposits are important archives of Earth’s history and serve as the record of turbidity current events that transfer large amounts of terrestrial sediment and carbon into the ocean. The geomorphology, depositional processes, and facies architecture change significantly along the submarinefan depositional profile, particularly at the channel-lobe-transition zone (CLTZ). However, few studies have documented detailed facies architecture and associated sedimentary structures in the CLTZ, which are important for paleoenvironmental interpretations and morphometric information essential to
reconstructing sediment transport dynamics in ancient successions.
Excellent outcrops from ancient CLTZ deposits of the Upper Cretaceous Point Loma Fm are exposed at Sunset Cliffs, San Diego, California, which constrain the overall facies architecture, grain-size distribution, and three-dimensional geometry of sedimentary structures. The Point Loma Fm shows an abundance of supercritical-flow bedforms (e.g.,cyclic steps) exposed in three dimensions, enabling the mapping of key surfaces and facies trends necessary for creating predictive models of these deposits. Characterizing the detailed facies architecture and bedform geometry for CLTZ deposits enables a better
understanding of the sediment transport dynamics and enhanced prediction of reservoir properties for comparable subsurface deposits that form hydrocarbon reservoirs and potential carbon dioxide storage
Measure me! A quantum outreach module
No full textAn alternate title for this is "Measure me! A quantum outreach module".Measure Me! is an interactive outreach activity designed to introduce middle and high school students to the foundational concept of quantum measurement bases. Through active gameplay, students experience the consequences of measuring quantum systems in different bases and come to understand that a quantum state can appear well-defined in one basis while remaining in superposition in another. Students are divided into "scientists" and "particles." The particles secretly choose a quantum state (represented by a playing card suit) and each carries a hand of cards corresponding to different bases. Scientists attempt to "measure" particles by hitting them with a dodgeball, prompting the particle to reveal a card in a chosen color basis (red or black). By collecting and analyzing the measurement results, scientists aim to infer the original states of the particles. The game emphasizes the probabilistic nature of quantum measurement and the basis-dependence of observed outcomes, helping students build an intuitive understanding of quantum superposition and measurement.NSF DMR 204642
Fern – Laccopteris smithii
No full textPhotographed by Ron Wolf.Fossil fern frond in fine-grained sedimentary rock, Petrified Forest, near Holbrook, Navajo County, Arizona
Barite on plancheite
No full textPhotographed by Ron Wolf.Glassy blue grey plates of barite on dull white plancheite, Milpillas mine, Cuitaca, Santa Cruz Municipio, Sonora, Mexico
Fish – Mioplosus labracoides
No full textPhotographed by Ron Wolf.Fossil fish showing details of bones, fins and head, on fine tan matrix, near Kemmerer, Lincoln County, Wyoming
Bryozoan – Archimedes wortheni
No full textPhotographed by Ron Wolf.Fossil Archimedes bryozoan colony with spiral-shaped mesh
Mimosa leaf – Mimosites coloradensis
No full textPhotographed by Ron Wolf.Outline of fossil mimosa leaf