Paleocurrents and Depositional Environments of the Dakota Group (Cretaceous), San Miguel County, New Mexico
Figure 3: Basal Cretaceous Strata ...
Figure 31: Compass Rose Diagrams ...
AuthorBejnar, Craig Russel
bedding plane irregularities
Mora County New Mexico
planar bedding structures
San Miguel County New Mexico
Geology -- New Mexico -- San Manuel County
Committee ChairWilson, Richard F.
MetadataShow full item record
PublisherThe University of Arizona.
RightsCopyright © is held by the author. Digital access to this material is made possible by the Antevs Library, Department of Geosciences, and the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author or the department.
Collection InformationThis item is part of the Geosciences Theses collection. It was digitized from a physical copy provided by the Antevs Library, Department of Geosciences, University of Arizona. For more information about items in this collection, please email the Antevs Library, firstname.lastname@example.org.
AbstractThe Dakota Group surrounding Las Vegas, New Mexico, consists of three units: 1) a basal, predominately trough cross-stratified, conglomeratic sandstone, 2) middle intercalated, thin-bedded sandstone and carbonaceous shale, and 3) upper, predominately tabular-planar cross-stratified, sandstone containing trace fossils. These units represent, respectively, 1) a fluvial piedmont plain, 2) fluvial coastal plain, and 3) a beach, littoral, and shallow marine complex. The cross-stratification in the lower sandstone unit indicates an easterly paleoslope. The cross-stratification in the upper sandstone unit has a bimodal distribution almost at right angles to the paleoslope, suggesting deposition by longshore currents. The standard deviation of the cross-stratification in the lower sandstone unit of 78° is typical of fluvial deposits. The standard deviation in the upper sandstone unit of 97° indicates a marine origin.
Degree ProgramGraduate College
Degree GrantorUniversity of Arizona
Showing items related by title, author, creator and subject.
Reconstruction of Precipitation and PDSI from Tree-Ring Chronologies Developed in Mountains of New Mexico, USDA and Sonora, MexicoVillanueva-Diaz, Jose; McPherson, Guy R.; University of Arizona, School of Renewable Natural Resources, Tucson (Arizona-Nevada Academy of Science, 1996-04-20)
Tracing Neoliberalism in Mexico: Historical Displacement and Survival Strategies for Mixtec Families living on the U.S.-Mexico BorderVogt, Wendy Alexandra (The University of Arizona., 2006)Mexican neoliberalism has systematically undermined Mexico's rural and indigenous populations and created multiple forms of displacement in communities and individual lives. This thesis traces the impacts of displacement in the lives of Mixtec families living and working on the U.S.-Mexico border. As families encounter new circumstances of risk, violation and vulnerability, they develop material, spatial and social strategies to provide safe and meaningful lives, often through contradictory and uneven processes. Central to these processes are power relations and negotiations of class, ethnicity and gender, which both maintain community and continuity as well as further perpetuate systems of inequality and differentiation between groups, families and individuals. The focus on indigenous peoples in Nogales fills important gaps in the literature of indigenous transnational migrants and the U.S-Mexico border, particularly in light of recent border policies, which are pushing more people to the Arizona-Sonora desert region.