303 research outputs found
Inland extent of the Weddell Sea Rift imaged by new aerogeophysical data
No full textThe Weddell Sea Rift was a major focus for Jurassic extension and magmatism during the early stages of Gondwana break-up and underlies the Weddell Sea Embayment, which separates East Antarctica from a collage of crustal blocks in West Antarctica. Newly-collected aerogeophysical data over the catchments of Institute and Möller ice streams reveal the inland extent of the Weddell Sea Rift against the Ellsworth-Whitmore block and a hitherto unknown major left-lateral strike slip boundary between East and West Antarctica. Aeromagnetic and gravity anomalies define the regional subglacial extent of Proterozoic basement, Middle Cambrian rift-related volcanic rocks, Jurassic intrusions and sedimentary rocks of inferred post-Jurassic age. 2D and 3D magnetic depth-to-source estimates were used to help constrain joint magnetic and gravity models for the region. The models reveal that Proterozoic crust similar to that exposed at Haag Nunataks, extends southeast of the Ellsworth Mountains to the margin of the Coastal Basins. Thick granitic Jurassic intrusions are modelled at the transition between the Ellsworth-Whitmore block and the thinner crust of the Weddell Sea Rift and within the Pagano Shear Zone. The crust beneath the inland extension of the Weddell Sea Rift is modelled as being either ~ 4 km thinner compared to the adjacent Ellsworth-Whitmore block or as underlain by an up to 8 km thick mafic underplate
U–Pb zircon geochronology and implications of Cambrian plutonism in the Ellsworth belt, Maine
No full textThe Ellsworth belt is one of several fault-bounded blocks exposed along the southeastern coast of Maine that formed within Ganderia. New ID-TIMS U–Pb geochronological data integrated with field relationships provide additional insights into the timing of magmatism and deformation in the Ellsworth belt. The deformed Lamoine Granite was selected for U–Pb zircon analysis in order to: i) establish the protolith age; ii) provide direct temporal constraints on regional low-grade metamorphism and deformation; and iii) elucidate relationships between the Ellsworth belt and coeval rocks elsewhere in the Appalachian orogen. The Lamoine Granite was emplaced within the Ellsworth Schist at 492 ± 1.7 Ma; this is the first unequivocal evidence for a Furongian magmatic event in the Ellsworth belt. The schistosity in the Lamoine Granite is parallel to the main fabric of the host Ellsworth Schist and provides a maximum estimate for timing of the regional metamorphic overprint. Widespread deformation in the Ellsworth belt where kinematic indicators indicate a top-to-northwest sense of shear is attributed to thrusting during which progressive horizontal shortening, caused crustal thickening and peak greenschist facies metamorphism. The Cambrian U–Pb age permits correlation of the Lamoine Granite with the Cameron Road Granite in the Annidale belt of New Brunswick where subduction-related magmas intruded the Penobscot arc–back-arc and were subsequently deformed during the Penobscot Orogeny.articl
Planning for Public Lands
No full textShannon Ellsworth is the Community Development Manager for Sunrise Engineering. She attended Utah State University, where she earned a degree in landscape architecture and environmental planning, and later earned an MBA at BYU. Shannon works with communities throughout the West as they make environmental, land-use, and infrastructure decisions. She was the author of the San Juan County Resource Management Plan during the designation of the Bears Ears National Monument in 2016. In 2019 Shannon was elected to the Provo City Council. She is currently a board member for LDS Earth Stewardship, and the Governor\u27s Rural Partnership Board.https://digitalcommons.usu.edu/laep_speakerseries/1009/thumbnail.jp
Song Lyric Sheet, Ellsworth\u27s Avengers, 1861
No full textThis song lyric sheet of Ellsworth\u27s Avengers, features illustrations of cherubs along the top, a woman along the left edge, a man holding a musical instrument on the right edge, and leafy vines. The author of the lyrics is named below the song title. The publisher is printed at the bottom of the page among the illustrations.https://scholarsjunction.msstate.edu/fvw-manuscripts-original-manuscripts/1275/thumbnail.jp
U–Pb zircon geochronology and implications of Cambrian plutonism in the Ellsworth belt, Maine
No full textThe Ellsworth belt is one of several fault-bounded blocks exposed along the southeastern coast of Maine that formed within Ganderia. New ID-TIMS U–Pb geochronological data integrated with field relationships provide additional insights into the timing of magmatism and deformation in the Ellsworth belt. The deformed Lamoine Granite was selected for U–Pb zircon analysis in order to: i) establish the protolith age; ii) provide direct temporal constraints on regional low-grade metamorphism and deformation; and iii) elucidate relationships between the Ellsworth belt and coeval rocks elsewhere in the Appalachian orogen. The Lamoine Granite was emplaced within the Ellsworth Schist at 492 1.7 Ma; this is the first unequivocal evidence for a Furongian magmatic event in the Ellsworth belt. The schistosity in the Lamoine Granite is parallel to the main fabric of the host Ellsworth Schist and provides a maximum estimate for timing of the regional metamorphic overprint. Widespread deformation in the Ellsworth belt where kinematic indicators indicate a top-to-northwest sense of shear is attributed to thrusting during which progressive horizontal shortening, caused crustal thickening and peak greenschist facies metamorphism. The Cambrian U–Pb age permits correlation of the Lamoine Granite with the Cameron Road Granite in the Annidale belt of New Brunswick where subduction-related magmas intruded the Penobscot arc–back-arc and were subsequently deformed during the Penobscot Orogeny.The presentation of the authors' names and (or) special characters in the title of the pdf file of the accepted manuscript may differ slightly from what is displayed on the item page. The information in the pdf file of the accepted manuscript reflects the original submission by the author
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Midnight on the Potomac ::the last year of the Civil War, the Lincoln assassination, and the rebirth of America /
No full text"From the author of the National Book Award longlisted title The Ground Breaking, a riveting new look at the assassination of Abraham Lincoln, replete with evidence pointing to a much larger Confederate conspiracy. Told with a page-turning pace and eye-opening cast of characters, Ellsworth sets out to correct a pivotal moment of American history that we have gotten completely wrong--until now. Jam-packed with fresh, revelatory evidence, Ellsworth's research strongly infers that by the time that the house lights dimmed inside of Ford's Theatre on the evening of April 14th, 1865, Booth had been working alongside, if not in direct concert with, the Confederate Secret Service for nearly a year. Historians have long ignored that during the last ten months of the Civil War, the Confederacy launched a desperate, audacious war of terror against the north. In the North, Rebels attempted to derail trains, set buildings on fire, spread smallpox, and undermined public support for the Union army. Instead, history books and schools teach that John Wilkes Booth acted alone, was admired by neither side, and was a second-rate actor. This couldn't have been further from the truth: Booth was charming, a world-famous performer, and--most importantly--an ardent supporter of the Confederacy. In the sweltering summer heat of 1864, President Abraham Lincoln had a front-row view of the Civil War, as he dodged firing bullets from the approaching Confederate army at Fort Stevens. It was the first time in American history that a sitting president would come under enemy fire, but the history books would put a far greater focus on his assassination just eight months later. In Midnight on the Potomac, Scott Ellsworth rewrites history, arguing that the two events were in fact connected and that Lincolns' assassination was likely ordered by leaders of the Confederate Army"-- Provided by publisher
Underground waters of the coastal plain of Georgia /
No full textPrepared in cooperation with the Geological Survey of Georgia.TC801.U2 no. 341 with: Surface water supply of the Yukon-Tanana region, Alaska / by C.E. Ellsworth and R.W. Davenport. Washington : Govt. Print. Off.,1915. Bound together subsequent to publication.Includes bibliographical references and index.Mode of access: Internet
Participation in the U.S. Ellsworth Mountains operation of the 1979-1980 austral summer, Antarctica
No full textField activities in the Ellsworth Mountains in the 1979-1980 austral summer were supported from a temporary U.S. base camp. To study metamorphic petrology, the author mainly surveyed Marble Hills, Liberty Hills, Edison Hills, High Nunatak, and Wilson Nunataks of the southern part of the Heritage Range, and the northwestern part of the same range. The duration of the actual field survey was 38 days and rock specimens collected amounted to some 400kg. Outlines are given on the logistics of the camp and the scientific teams during the season
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