A5007062630- Geological and Geochemical Analysis
- Geological and Tectonic Studies in Latin America
- Geology and Paleoclimatology Research
- earthquake and tectonic studies
- Geological Studies and Exploration
- Geological and Geophysical Studies
- Botany and Geology in Latin America and Caribbean
- Geological formations and processes
- Geological and Geophysical Studies Worldwide
- Geological Modeling and Analysis
- Wildlife Ecology and Conservation
- Evolution and Paleontology Studies
- Plant and animal studies
- Coral and Marine Ecosystems Studies
- Environmental Science and Water Management
- Geochemistry and Geologic Mapping
- Tropical and Extratropical Cyclones Research
- Geotechnical and Geomechanical Engineering
- Methane Hydrates and Related Phenomena
- Geography Education and Pedagogy
- Hydrocarbon exploration and reservoir analysis
- Archaeology and Natural History
- Geotourism and Geoheritage Conservation
- High-pressure geophysics and materials
- Ecology and Vegetation Dynamics Studies
Augustana College
2019-2024
University of Cincinnati
2017-2020
California State University, Fullerton
2011-2014
Research Article| May 01, 2013 Focused exhumation in the syntaxis of western Chugach Mountains and Prince William Sound, Alaska Jeanette C. Arkle; Arkle 1Geological Sciences, California State University–Fullerton, 800 N. College Boulevard, Fullerton, 92834, USA †Current address: Department Geology, University Cincinnati, P.O. Box 0013, Ohio 45221, USA. Search for other works by this author on: GSW Google Scholar Phillip A. Armstrong; Armstrong § §E-mail: parmstrong@fullerton.edu Peter J....
Megathrust splay faults are a common feature of accretionary prisms and can be important for generating tsunamis during some subduction zone earthquakes. Here we provide new evidence from Alaska that megathrust have been conduits focused exhumation in the last 5 Ma. In most central Prince William Sound, published low-temperature thermochronology data indicate little to no permanent rock uplift over tens thousands earthquake cycles. However, southern Sound on Montague Island, apatite...
Megathrust splay fault systems in accretionary prisms have been identified as conduits for long-term plate motion and significant coseismic slip during subduction earthquakes. These are important because of their role generating tsunamis, but rarely emergent above sea level where (million year) history can be studied. We present 32 apatite (U-Th)/He (AHe) 27 fission-track (AFT) ages from rocks along an megathrust system the Prince William Sound region Alaska shallowly subducting Yakutat...
The Bighorn Mountains in north-central Wyoming reveal one of the largest exposures 2800 Ma to 3000 rocks Laurentia. northern part crystalline core is composed composite batholith, whereas central and southern areas range expose older gneiss complexes as well minor supracrustal rocks. We provide new high-resolution LA-ICPMS U-Pb data on zircons sampled from eleven samples tonalite, granodiorite, mylonite, migmatite margin batholith headwaters north fork Paint Rock Creek. These strongly...
Abstract Aim To date a vicariant event through the mutualistic relationship of hylid frog and its bromeliad host found across two isolated mountain ranges as part an island–continental split to use this information calibrate molecular dating analysis hylids. Location South America. Time Period Pliocene. Major Taxa Studied Treefrogs, Arboranae. Methods Pliocene tectonic movements sank portion range that connected present‐day Trinidad (island) northern Venezuela, eventually isolating...
Abstract The Northern Canadian Cordillera ( NCC ) comprises the Mackenzie Mountains, which are characterized by earthquakes occurring ~1,000 km east of western North American margin. However, no recognized convergence has occurred in this inboard region since Mesozoic to early Cenozoic formation Cordillera. This lack an obvious driver for modern deformation generated considerable debate and various geodynamic models. We show here thermal histories derived from (U‐Th‐Sm)/He data that...
Abstract Plate corners that transition from subduction to transform motion can result in complex deformation. The southeastern corner of the Caribbean plate is a site where active westward oceanic South American transitions along continental America. Northern Range (Trinidad) and Paria (Venezuela) metamorphic mountains are located directly above this eastward propagating zone. We examined exhumation history eastern using apatite fission track (AFT) zircon (U‐Th)/He (AHe ZHe, respectively)...
Abstract The Northern Range of Trinidad is composed Mesozoic passive margin sedimentary rocks that underwent ductile deformation and subgreenschist‐ to greenschist‐facies metamorphism in the early Miocene. Previous studies suggested a two‐stage formation between Caribbean South American plates: an initial collision drove mountain building Miocene subsequent strike‐slip plate motion preferentially exhumed western segment, producing westward increase metamorphic thermal gradient. However,...