Zobrazeno 1 - 10
of 64
pro vyhledávání: '"Henry C. Halls"'
Autor:
Giday WoldeGabriel, Nicholas J. G. Pearce, Henry C. Halls, John A. Westgate, René W. Barendregt, Michael P. Gorton, Andrei M. Sarna-Wojcicki, Emily S. Schultz-Fellenz, Colin J. Bray, Richard E. Kelley
A fine-grained, up to 3-m-thick tephra bed in southwestern Saskatchewan, herein named Duncairn tephra (Dt), is derived from an early Pleistocene eruption in the Jemez Mountains volcanic field of New Mexico, requiring a trajectory of northward tephra
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::504d203c935203aa60beb0bac1208f08
http://hdl.handle.net/11585/801439
http://hdl.handle.net/11585/801439
Publikováno v:
Precambrian Research. 257:137-166
A paleomagnetic study of the western end of the ∼585 Ma Grenville dyke swarm shows that individual dykes are characterized by high coercivity and unblocking temperature magnetizations that can differ in direction by as much as 90°. Field tests inc
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7e1fca2dfe909b32505caa70b05e4819
https://doi.org/10.1016/j.precamres.2014.11.029
https://doi.org/10.1016/j.precamres.2014.11.029
Publikováno v:
Precambrian Research. 244:1-4
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9c990d718c9964b302c59f78c20eaeb8
https://doi.org/10.1016/j.precamres.2014.02.014
https://doi.org/10.1016/j.precamres.2014.02.014
Autor:
Henry C. Halls
Publikováno v:
Precambrian Research. 244:42-52
In the last 130 million years, perhaps as much as 2000 km of intra-continental shortening has taken place within Asia during 10,000 km of convergence between Siberia and India (with ∼8000 km being accommodated by oceanic subduction). Given that Ear
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::53f02b43d31ecf4da443ac888c86a3b9
https://doi.org/10.1016/j.precamres.2013.09.005
https://doi.org/10.1016/j.precamres.2013.09.005
Autor:
Johanna Salminen, Henry C. Halls, Ulf Söderlund, Satu Mertanen, Lauri J. Pesonen, J.I. Vuollo
Publikováno v:
Precambrian Research. 244:87-99
Paleomagnetic results are presented for two Paleoproterozoic mafic dykes in the Taivalkoski area in northern Karelia Province of the Fennoscandian shield where, based on K-Ar data, the crust has seen minimal effects of the otherwise pervasive 1.8-1.9
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::20f18f4667566d9cc42f7e3315b8a284
https://doi.org/10.1016/j.precamres.2013.07.011
https://doi.org/10.1016/j.precamres.2013.07.011
Autor:
R. Don Russell, Henry C. Halls, Lawrence W. Morley, R. M. Farquhar, Gordon F. West, G.D. Garland
Publikováno v:
Canadian Journal of Earth Sciences. 51:xvii-xxxi
Fifty years ago, the world’s Earth Scientists experienced the so-called “Revolution in the Earth Sciences”. In the decade from 1960 to 1970, a massive convergence took place from many diverse and contradictory theories about the tectonic proces
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::72a9bef806c96ca8b912a384bf8fd2de
https://doi.org/10.1139/cjes-2013-0175
https://doi.org/10.1139/cjes-2013-0175
Autor:
Henry C. Halls, Steven W. Denyszyn
Publikováno v:
Journal of Geophysical Research: Solid Earth. 119:360-363
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c72d8dd87c8f57c730b5e79c529d1416
https://doi.org/10.1002/2013jb010323
https://doi.org/10.1002/2013jb010323
Autor:
Henry C. Halls, David Evans
Publikováno v:
Precambrian Research. 183:474-489
Geometrical patterns of Paleoproterozoic dyke swarms in the Superior craton, North America, and paleomagnetic studies of those dykes, both indicate relative motion across the Kapuskasing Structural Zone (KSZ) that divides the craton into eastern and
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::16ab36c08039b80224947fdf75cbcfed
https://doi.org/10.1016/j.precamres.2010.02.007
https://doi.org/10.1016/j.precamres.2010.02.007
Publikováno v:
Precambrian Research. 183:553-571
The Midcontinent Rift (MCR) of North America comprises a series of basaltic sheets, flows and intrusive rocks emplaced in the Lake Superior region during the Mesoproterozoic. The mafic rocks preserved on the northern flank of Lake Superior represent
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7bc8227adfb915821be09b78b05569fa
https://doi.org/10.1016/j.precamres.2010.01.012
https://doi.org/10.1016/j.precamres.2010.01.012
Publikováno v:
Canadian Journal of Earth Sciences. 46:689-705
U–Pb baddeleyite ages and paleomagnetic poles obtained for dykes on Devon Island and Ellesmere Island in the Canadian Arctic and the Thule region of Greenland show that they are associated with the Franklin magmatic event. This study is the only on
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7fbb8239d31b637612f1fb78c2531a50
https://doi.org/10.1139/e09-042
https://doi.org/10.1139/e09-042