Výsledky vyhledávání - "Keith A. Howard"

Akademický článek

Cryptic evolved melts beneath monotonous basaltic shield volcanoes in the Galápagos Archipelago

Autor: Michael J. Stock, Dennis Geist, David A. Neave, Matthew L. M. Gleeson, Benjamin Bernard, Keith A. Howard, Iris Buisman, John Maclennan

Publikováno v: Nature Communications, Vol 11, Iss 1, Pp 1-13 (2020)

In this study the authors show that monotonous basaltic volcanoes can host a range of melts in their sub-volcanic systems, extending to rhyolitic compositions. The study implies that volcanoes which have produced monotonous basaltic lavas on long tim

Externí odkaz: https://doaj.org/article/e3992b10b6654b708dc65b91724291a3

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Magmatic record of changing Cordilleran plate-boundary conditions—Insights from Lu-Hf isotopes in the Mojave Desert

Autor: Keith A. Howard, Stirling E. Shaw, Charlotte M. Allen

Publikováno v: Geosphere. 19:1-18

Belts of Cordilleran arc plutons in the eastern part of the Mojave crustal province, inboard from the southwestern North American plate boundary, record major magmatic pulses at ca. 180–160 and 75 Ma and smaller pulses at ca. 100 and 20 Ma. This cy

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::23f2378f792a42e8e772916bd2d38cea
https://doi.org/10.1130/ges02438.1

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Testing models of Laramide orogenic initiation by investigation of Late Cretaceous magmatic-tectonic evolution of the central Mojave sector of the California arc

Autor: Jennifer L. Roell, Keith A. Howard, Scott R. Paterson, Emerson F. Palmer, Brody P. Friesenhahn, J. Lawford Anderson, Andrew P. Barth, Bettina Wiegand, R. C. Economos, Adam J. Ianno, Joseph L. Wooden

Publikováno v: Geosphere. 17:2042-2061

The Mojave Desert region is in a critical position for assessing models of Laramide orogenesis, which is hypothesized to have initiated as one or more seamounts subducted beneath the Cretaceous continental margin. Geochronological and geochemical cha

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::405f7e7dec506ef789ee9a783ddb9da3
https://doi.org/10.1130/ges02225.1

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Relationships between mediolateral step modulation and clinical balance measures in people with chronic stroke

Autor: Keith E. Howard, Nicholas K. Reimold, Heather L. Knight, Aaron E. Embry, Holly A. Knapp, Alexa A. Agne, Camden J. Jacobs, Jesse C. Dean

BackgroundMany people with chronic stroke (PwCS) exhibit walking balance deficits linked to increased fall risk and decreased balance confidence. One potential contributor to these balance deficits is a decreased ability to modulate mediolateral step

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::eb5dbc082128a8113956f763cb26e7aa
https://doi.org/10.1101/2022.04.26.489530

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The Bouse Formation, a controversial Neogene archive of the evolving Colorado River: a scientific drilling workshop report (28 February–3 March 2019 – BlueWater Resort & Casino, Parker, AZ, USA)

Autor: Ryan S. Crow, Keith A. Howard, Andrew S. Cohen, Laura J. Crossey, Brian F. Gootee, Rebecca J. Dorsey, Colleen E. Cassidy, Kyle House, Philip A. Pearthree, Karl E. Karlstrom, Jordon Bright

Publikováno v: Scientific Drilling, Vol 26, Pp 59-67 (2019)

Neogene deposits of the lower Colorado River valley, especially the Miocene(?) and early Pliocene Bouse Formation, have been the focus of intense debate regarding the early paleoenvironmental history of this important continental-scale river system i

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e9f70a588a686ceeb3d4ee4af85a361d
https://www.sci-dril.net/26/59/2019/sd-26-59-2019.pdf

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Preparing for Powerful Progress: Ensuring Equity When Supporting Black Students

Autor: Keith E. Howard, Nicol R. Howard

The purpose of this chapter is to critically analyze the historical relations between Black students and the American education system. In particular, this chapter is designed to challenge the status quo and examine the ways in which the K-12 educato

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::b2d4eb88d5135cfe6a390221c197edf9
https://doi.org/10.1108/s1479-363620210000016005

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Insights into post-Miocene uplift of the western margin of the Colorado Plateau from the stratigraphic record of the lower Colorado River

Autor: Ryan S. Crow, Karl E. Karlstrom, Colleen E. Cassidy, P. Kyle House, Lisa Peters, Tracey J. Felger, Philip A. Pearthree, L. Sue Beard, Keith A. Howard, William C. McIntosh, Debra L. Block

Publikováno v: Geosphere. 15:1826-1845

The spatial and temporal distribution of Pliocene to Holocene Colorado River deposits (southwestern USA and northwestern Mexico) form a primary data set that records the evolution of a continental-scale river system and helps to delineate and quantif

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::13ef83e86dd3e9a2b6f9e39a2e48fc68
https://doi.org/10.1130/ges02020.1

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Let’s Talk: An Examination of Parental Involvement as a Predictor of STEM Achievement in Math for High School Girls

Autor: R. T. Busse, Nicol R. Howard, Keith E. Howard, Christine Hunt

Publikováno v: Urban Education. 58:586-613

This research was conducted to examine the influence of parental involvement, in the form of parent conversations, on mathematics achievement for high school girls. Data from the High School Longitudinal Study of 2009 (HSLS:09) public-use file provid

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::ad1997908bb5eb0db2070ccf4383fa86
https://doi.org/10.1177/0042085919877933

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Detrital K-feldspar Pb isotopic evaluation of extraregional sediment transported through an Eocene tectonic breach of southern California's Cretaceous batholith

Autor: Danielle Ziva Shulaker, Nicholas J. Van Buer, Andrew P. Barth, Jeremy K. Hourigan, Glenn R. Sharman, Jonathan S. Miller, Keith A. Howard, Marty Grove

Publikováno v: Earth and Planetary Science Letters. 508:4-17

Sedimentary provenance studies have come to be overwhelmingly based upon U–Pb geochronologic measurements performed with detrital zircon while alternative and potentially complementary approaches such as conglomerate clast studies and heavy mineral

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::706b0fd4a067eb1578fac17a564fefcd
https://doi.org/10.1016/j.epsl.2018.11.040

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Cryptic evolved melts beneath monotonous basaltic shield volcanoes in the Galápagos Archipelago

Autor: Keith A. Howard, Iris Buisman, Dennis Geist, Benjamin Bernard, John Maclennan, Matthew Gleeson, David A. Neave, Michael J. Stock

Publikováno v: Nature Communications, Vol 11, Iss 1, Pp 1-13 (2020)
Stock, M J, Geist, D, Neave, D, Gleeson, M L M, Bernard, B, Howard, K A, Buisman, I & Maclennan, J 2020, ' Cryptic evolved melts beneath monotonous basaltic shield volcanoes in the Galápagos Archipelago ', Nature Communications . https://doi.org/10.1038/s41467-020-17590-x
Nature Communications

Funder: Jeremy Willson Charitable Trust - research grant
Many volcanoes erupt compositionally homogeneous magmas over timescales ranging from decades to millennia. This monotonous activity is thought to reflect a high degree of chemical homogene

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b6bca829d3b170fb6afb5f5825f1d565
https://doi.org/10.1038/s41467-020-17590-x

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