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Full-Text Articles in Earth Sciences
Possible Sources For Nickel And Chromium In The Middle Part Of The Fillmore Formation In West-Central Utah, Rachel Nyznyk, Benjamin Dattilo
Possible Sources For Nickel And Chromium In The Middle Part Of The Fillmore Formation In West-Central Utah, Rachel Nyznyk, Benjamin Dattilo
Benjamin F. Dattilo
Nickel and chromium are not commonly found in carbonate or mixed carbonate depositional environments. All lithologies from a 100-meter section in the middle part of the Lower Ordovician Fillmore Formation at a single locality, the “Pyramid Section”, contain anomalous levels of nickel and chromium. Preliminary data has also shown that there is significantly more nickel in the matrix of two FPCs (range of 0.22 – 0.24 ppm) from the pyramid section than found in the other lithologies at that section (0.05 – 0.10 ppm). However, at a separate locality, “Section C”, in the lower part of the Fillmore Formation neither …
Provenance, Sorting, And Secular Variation In Late Cambrian And Early Ordovician Carbonate Flat-Pebble Conglomerates In West-Central Utah, Rachel Nyznyk, Benjamin Dattilo, Kevin Evans
Provenance, Sorting, And Secular Variation In Late Cambrian And Early Ordovician Carbonate Flat-Pebble Conglomerates In West-Central Utah, Rachel Nyznyk, Benjamin Dattilo, Kevin Evans
Benjamin F. Dattilo
Flat-pebble conglomerates (FPCs) are deposits that include tabular clasts of carbonate facies in shallow marine successions. They are common features in Cambrian and Ordovician successions and are more rarely preserved in post-Ordovician strata. Traditional interpretations suggest they are storm deposits, but more recently, they have interpreted as cycle caps and products of sea-level change. Examining FPCs in detail may further our understand of possible origins, including major Earth events such as meteorite impacts, seismic events, superstorms, slope failures, and mass wasting events. This study, which is in its initial phase, examines FPCs based on intrinsic features and seeks to document …
The Great American Carbonate Bank In The Miogeocline Of Western Central Utah: Tectonic Influences On Sedimentation., James Miller, Kevin Evans, Benjamin Dattilo
The Great American Carbonate Bank In The Miogeocline Of Western Central Utah: Tectonic Influences On Sedimentation., James Miller, Kevin Evans, Benjamin Dattilo
Benjamin F. Dattilo
No abstract provided.
Using The Longitudinal River Profile Of The Rio San Jose And 40ar/39ar Dating Of Late-Cenozoic Basalts To Test Models For Mantle-Driven Uplift Across The Jemez Lineament, New Mexico, Mike Channer, Jason Ricketts, Matt Zimmerer, Matt Heizler, Karl Karlstrom
Using The Longitudinal River Profile Of The Rio San Jose And 40ar/39ar Dating Of Late-Cenozoic Basalts To Test Models For Mantle-Driven Uplift Across The Jemez Lineament, New Mexico, Mike Channer, Jason Ricketts, Matt Zimmerer, Matt Heizler, Karl Karlstrom
Mike Channer
Mantle-driven differential uplift has been proposed to contribute to dynamic typography in the western United States. Neogene and ongoing mantle flow is postulated to be driven by upper mantle convection and to cause subtle broad-scale differential uplift that affects surface topography. This study focuses on the possible connection between mantle convection and surface topography along the Jemez lineament in New Mexico and is motivated by tomographic images from the EarthScope experiment that show this zone is underlain by low-velocity mantle that potentially could drive uplift. To test this possible connection, we constructed a longitudinal profile of the Rio San Jose …
Evolution Of The Stress And Strain Fields In The Eastern Cordillera, Colombia, Obi Egbue, James N. Kellogg
Evolution Of The Stress And Strain Fields In The Eastern Cordillera, Colombia, Obi Egbue, James N. Kellogg
James N Kellogg
This work integrates stress data from Global Positioning System measurements and earthquake focal mechanism solutions, with new borehole breakout and natural fracture system data to better understand the complex interactions between the major tectonic plates in northwestern South America and to examine how the stress regime in the Eastern Cordillera and the Llanos foothills in Colombia has evolved through time. The dataset was used to generate an integrated stress map of the northern Andes and to propose a model for stress evolution in the Eastern Cordillera. In the Cordillera, the primary present-day maximum principal stress direction is WNW-ESE to NW-SE, …
Rheology Of Magnesite, Caleb Holyoke, Andreas Kronenberg, Julie Newman, Christopher Ulrich
Rheology Of Magnesite, Caleb Holyoke, Andreas Kronenberg, Julie Newman, Christopher Ulrich
Caleb Holyoke
No abstract provided.
Microstructural Evolution During Strain Localization In Dolomite Aggregates, Caleb Holyoke, Julie Newman, Andreas Kronenberg
Microstructural Evolution During Strain Localization In Dolomite Aggregates, Caleb Holyoke, Julie Newman, Andreas Kronenberg
Caleb Holyoke
No abstract provided.