Zobrazeno 1 - 10
of 227
pro vyhledávání: '"Sandra M. Barr"'
Publikováno v:
Canadian Journal of Earth Sciences. 60:485-512
The Bras d'Or terrane of central Cape Breton Island, Nova Scotia, Canada, contains a well-preserved record of the Ediacaran to early Cambrian evolution of Ganderia, a Gondwana-derived terrane in the northern Appalachian orogen. A complex assemblage o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a4eadd2f9d37b1eace1b240683a7cf72
https://doi.org/10.1139/cjes-2022-0103
https://doi.org/10.1139/cjes-2022-0103
Publikováno v:
Canadian Journal of Earth Sciences. 60:442-462
The Coldbrook Group and related plutons in the Caledonian Highlands of southern New Brunswick contain voluminous late Ediacaran silicic rocks formed in a magmatic event not recognized in other parts of Avalonia in the northern Appalachian orogen. To
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8fc5b802cbba9c9bbcf7e767947ab15b
https://doi.org/10.1139/cjes-2022-0100
https://doi.org/10.1139/cjes-2022-0100
Autor:
Sandra M. Barr, Chris E. White, Teodoro Palacios, Sören Jensen, Deanne van Rooyen, James L. Crowley
Publikováno v:
Canadian Journal of Earth Sciences. 60:307-332
The MacCodrum Formation is a classical “lower” Cambrian unit in southeastern Cape Breton Island stratigraphy, described since the 1800s. The age of this formation and its correlation with other Avalonian Cambrian units in eastern Newfoundland and
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d410e90326520383a8155f548edce3a2
https://doi.org/10.1139/cjes-2022-0044
https://doi.org/10.1139/cjes-2022-0044
Publikováno v:
Canadian Journal of Earth Sciences. 59:346-359
Zircon grains from metasiltstone beds in the Precambrian Ashburn Formation were dated to constrain the age of the stromatolite Archaeozoon acadiense. The largest group of analyzed grains consists of mostly well-rounded detrital zircon no younger than
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::62ac449828bd1d22695702feb4b3450c
https://doi.org/10.1139/cjes-2021-0100
https://doi.org/10.1139/cjes-2021-0100
Publikováno v:
Canadian Journal of Earth Sciences. 59:12-28
A large dyke of quartz tholeiitic gabbronorite has been mapped for 59 km in southern New Brunswick, Canada, between Lepreau River in the northeast and Indian Island in the southwest. Scattered outcrops occur along a positive aeromagnetic lineament, p
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7803d4ffd0d5b8312aa231927a5a8459
https://doi.org/10.1139/cjes-2021-0038
https://doi.org/10.1139/cjes-2021-0038
Autor:
Alex Zagorevski, Sandra M. Barr, Chris E. White, John W.F. Waldron, Cees R. van Staal, David I. Schofield
Publikováno v:
Gondwana Research. 98:212-243
West and East Ganderia in the northern Appalachians and Caledonides, respectively, represent a Gondwanan superterrane situated along the Tornquist margin of Amazonia prior to Furongian drift into the Iapetus Ocean, which opened the Rheic Ocean from w
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::be5dc8d2627e474ded2e362fc2c37f38
https://doi.org/10.1016/j.gr.2021.05.025
https://doi.org/10.1016/j.gr.2021.05.025
Autor:
John W.F. Waldron, Phil J.A. McCausland, Sandra M. Barr, David I. Schofield, Doug Reusch, Lei Wu
The Iapetus Ocean was the first ancient ocean to be identified following the development of plate tectonics; its history has been fundamental in relating orogenesis and plate motion. The ocean probably formed following 3-way rifting between Laurentia
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a103bcb4a5a4b9daa3863543b7f5f9cf
Autor:
J. Javier Álvaro, Susan C. Johnson, Sandra M. Barr, Sören Jensen, Teodoro Palacios, Deanne van Rooyen, Chris E. White
Publikováno v:
GSA Bulletin.
The Cambrian syn-rift strata preserved in western Avalonia provide a distinctive example of how unconformity-bounded sequences are diachronous throughout proximal to marginal rift branches. Terreneuvian‒Miaolingian third-order sequences of the Cale
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::06c36f3e0dd78b690cfec70abd1cef0c
https://doi.org/10.1130/b36402.1
https://doi.org/10.1130/b36402.1
Publikováno v:
Canadian Journal of Earth Sciences. 58:396-412
The oldest rocks in the Avalonian Antigonish Highlands of northern mainland Nova Scotia, Canada, are late Neoproterozoic (>618 Ma) volcanic and sedimentary rocks of the Georgeville Group intruded by gabbroic/dioritic to granitic plutons. New U–Pb z
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7f68501f0541c190c9e4652671612b08
https://doi.org/10.1139/cjes-2020-0110
https://doi.org/10.1139/cjes-2020-0110
Autor:
Sandra M. Barr, Phil J.A. McCausland, Gregory R. Dunning, John W.F. Waldron, Halima S. Warsame, Chris E. White
Publikováno v:
Canadian Journal of Earth Sciences. 58:315-331
Paleomagnetic results and a U–Pb baddeleyite age from the Silurian Mavillette gabbroic sill in southwest Nova Scotia, Canada, provide new evidence about the Paleozoic tectonic evolution of the Meguma terrane. The Mavillette gabbro sill intruded ca.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::558ed3b3175e10271218d9b0ddfda210
https://doi.org/10.1139/cjes-2020-0089
https://doi.org/10.1139/cjes-2020-0089