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Articles 1 - 6 of 6
Full-Text Articles in Physical Sciences and Mathematics
Understanding Paleoclimate And Human Evolution Through The Hominin Sites And Paleolakes Drilling Project, Andrew Cohen, Ramon Arrowsmith, Anna K. Behrensmeyer, Christopher Campisano, Craig Feibel, Shimeles Fisseha, Roy Johnson, Zelalem Bedaso, Charles Lockwood, Emma Mbua, Daniel Olago, Richard Potts, Kaye Reed, Robin Renaut, Jean-Jacques Tiercelin, Mohammed Umer
Understanding Paleoclimate And Human Evolution Through The Hominin Sites And Paleolakes Drilling Project, Andrew Cohen, Ramon Arrowsmith, Anna K. Behrensmeyer, Christopher Campisano, Craig Feibel, Shimeles Fisseha, Roy Johnson, Zelalem Bedaso, Charles Lockwood, Emma Mbua, Daniel Olago, Richard Potts, Kaye Reed, Robin Renaut, Jean-Jacques Tiercelin, Mohammed Umer
Geology Faculty Publications
Understanding the evolution of humans and our close relatives is one of the enduring scientific issues of modern times. Since the time of Charles Darwin, scientists have speculated on how and when we evolved and what conditions drove this evolutionary story. The detective work required to address these questions is necessarily interdisciplinary, involving research in anthropology, archaeology, human genetics and genomics, and the earth sciences. In addition to the difficult tasks of finding, describing, and interpreting hominin fossils (the taxonomic tribe which includes Homo sapiens and our close fossil relatives from the last 6 Ma), much of modern geological research …
Geometry Of The Trachyte Mesa Intrusion, Henry Mountains, Utah: Implications For The Emplacement Of Small Melt Volumes Into The Upper Crust, Paul H. Wetmore, Charles B. Connor, Sarah E. Kruse, Sean Callihan, Geoffrey Pignotta, Ciprian Stremtan, Andrea Burke
Geometry Of The Trachyte Mesa Intrusion, Henry Mountains, Utah: Implications For The Emplacement Of Small Melt Volumes Into The Upper Crust, Paul H. Wetmore, Charles B. Connor, Sarah E. Kruse, Sean Callihan, Geoffrey Pignotta, Ciprian Stremtan, Andrea Burke
Geology Faculty Publications
The Trachyte Mesa intrusion is one of several small satellite bodies to the larger intrusions of the Henry Mountains, Utah. Most previous studies have worked under the assumptions that Trachyte Mesa is blister shaped and intruded into flat and gently NW dipping strata. In this study we combine structural and geophysical data sets to constrain the structural geology of the host lithologies and the unmodified geometry of the intrusion. Trachyte Mesa intrudes a series of northeast trending upright and open folds formed within the Jurassic Entrada Formation. Truncation of these folds at the contact with the overlying Curtis/Summerville formations indicates …
Performance Of Upham Beach T-Groin Project And Its Impact To The Downdrift Beach, Ping Wang, Tiffany M. Roberts
Performance Of Upham Beach T-Groin Project And Its Impact To The Downdrift Beach, Ping Wang, Tiffany M. Roberts
Geology Faculty Publications
The field of 5 T-groins installed at Upham Beach was designed to maintain a portion of the nourished beach at this chronically eroding location without negative impacts to the downdrift beach. The T-groin project area was renourished in September 2006 and all the structures were buried. During the initial 3 months after the nourishment, rapid beach erosion at the north segment, as typical of Upham Beach, was measured. Since all the structures were buried, this rapid erosion should not be directly related to the T-groin field. The downdrift beach remained largely stable to slightly accretionary, benefiting from the sand supply …
Every Equation Tells A Story: Using “Equation Dictionaries” In Introductory Geophysics, Jacqueline Caplan-Auerbach
Every Equation Tells A Story: Using “Equation Dictionaries” In Introductory Geophysics, Jacqueline Caplan-Auerbach
Geology Faculty Publications
Many students view equations as a series of variables and operators into which numbers should be plugged rather than as representative of a physical process. To solve a problem they may simply look for an equation with the correct variables and assume it meets their needs, rather than selecting an equation that represents the appropriate physical process. These issues can be addressed by encouraging students to think of equations as stories, and to describe them in prose. This is the goal of the Equation Dictionary project, used in Western Washington University's introductory geophysics course. Throughout the course, students create personal …
What Is Diplograptus?, Charles Mitchell, Jörg Maletz, Daniel Goldman
What Is Diplograptus?, Charles Mitchell, Jörg Maletz, Daniel Goldman
Geology Faculty Publications
Diplograptus pristis (Hisinger, 1837) is the type species of the genus Diplograptus and name bearer for suborder Diplograptina. This species is primarily known from the Dalarne region of Sweden, where it occurs in the P. linearis Zone. D. pristis exhibits a suite of features (particularly the shape of the proximal end, the configuration of proximal spines, and the gradient in thecal form) that is uniquely shared with a number of other late Katian and earliest Hirnantian species including Glyptograptus nicholsoni Toghill, 1970; Glyptograptus posterus Koren’ & Tzai (in Apollonov et al. 1980); Orthograptus maximus Mu, 1945; and Orthograptus truncatus rarithecatus …
Influences Of Channel Dredging On Flow And Sedimentation Patterns At Microtidal Inlets, West-Central Florida, Usa, Tanya M. Beck, Ping Wang
Influences Of Channel Dredging On Flow And Sedimentation Patterns At Microtidal Inlets, West-Central Florida, Usa, Tanya M. Beck, Ping Wang
Geology Faculty Publications
Four inlets (Johns Pass and Blind Pass; and New Pass and Big Sarasota Pass) in two multi-inlet systems along the West-central Florida coast were studied. Johns Pass, New Pass, and Blind Pass are dredged every 4-9 years, whereas Big Sarasota Pass has never been dredged. The goal of this study was to investigate the morphodynamics of the four inlets and the influences of channel dredging on the flow patterns over the ebb tidal delta and sediment bypassing. Time-series aerial photographs and bathymetric maps starting from the 1920s were analyzed to assess the pathways of sand bypassing and morphodynamics at the …