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3by Watson, Simon Timothy“... and Middle Ordovician sequence of dominantly carbonate and shale deposited in an epeiric sea. Ordovician...”
Published 1986
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4by Mohibullah, Mohibullah, Vandenbroucke, Thijs, Williams, Mark, Floyd, James D, Meidla, Tonu, Zalasiewicz, Jan A, Siveter, David JSubjects: “...MIDDLE ORDOVICIAN...”
Published in Scottish Journal of Geology (2011)
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5by Beranek, LP, van Staal, CR, Gordee, Sarah M, McClelland, WC, Israel, S, Mihalynuk, M“...Upper Cambrian to Middle Ordovician mafic volcanic rocks of the Donjek assemblage comprise...”
Published in The Journal of Geology (2012)
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6“... (Lower to Middle Ordovician?) includes arc-type and ocean-floor volcanics, chert, mudrock, and carbonates...”
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7by Leslie, Christopher Dean“... associated with the Middle Ordovician rifting event (460 – 444 Ma) comprises massive mafic volcanic rocks...”
Published 2009
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8by Leslie, Christopher Dean“... associated with the Middle Ordovician rifting event (460 – 444 Ma) comprises massive mafic volcanic rocks...”
Published 2009
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9by Leslie, Christopher Dean“... associated with the Middle Ordovician rifting event (460 – 444 Ma) comprises massive mafic volcanic rocks...”
Published 2009
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10by Trettin, H. P., Parrish, R., Loveridge, W. D.“..., at Cape Richards and Cape Woods, are, respectively, Middle Ordovician (463 ± 5 Ma) and Devonian (382 ± 18...”
Published in Canadian Journal of Earth Sciences (1987)
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11“...- 39A r ages of orthoclase from these alteration assemblages indicate a Middle Ordovician (461 Ma) age...”
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12by Abay, Tesfamariam Berhane, Karlsen, Dag Arild, Olaussen, Snorre, Pedersen, Jon Halvard, Hanken, Nils-Martin“... from the Lower Cambrian Tokammane Formation, the Lower to Middle Ordovician Kirtonryggen...”
Published in Journal of Petroleum Science and Engineering (2022)
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13by Nekhorosheva, Lyudmila V.“... designation from the Middle Ordovician, Trentonian of Minnesota, USA. : Published as part of Nekhorosheva...”
Published 2002
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14by Nekhorosheva, Lyudmila V.“... designation from the Middle Ordovician, Trentonian of Minnesota, USA. Published as part of Nekhorosheva...”
Published 2002
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15“... and Silurian rocks. A widespread intraplatform basin of Early and Middle Ordovician age in northern Alaska has...”
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16by Victoria B. Ershova, Andrei V. Prokopiev, Valery A. Nikishin, Andrey K. Khudoley, Nikolay A. Malyshev, Anatoly M. Nikishin“... ranging from 450 to 570 millions of years, with a predominance of Early–Middle Ordovician zircons...”
Published in Polar Research (2015)
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17“...., 2020, Atlanticalymene, a new genus of Middle Ordovician (Darriwilian) calymenine trilobites...”
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18“...., 2020, Atlanticalymene, a new genus of Middle Ordovician (Darriwilian) calymenine trilobites...”
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19by Victoria B. Ershova, Andrei V. Prokopiev, Valery A. Nikishin, Andrey K. Khudoley, Nikolay A. Malyshev, Anatoly M. Nikishin“... ranging from 450 to 570 millions of years, with a predominance of Early–Middle Ordovician zircons...”
Published in Polar Research (2015)
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20Late Ordovician And Early Silurian Graptolites, Cape Phillips Formation, Canadian Arctic Archipelagoby Melchin, Michael Jerome“... Hedrograptus proceeds from middle Ordovician times into the Llandovery and gives rise to the major Early...”
Published 1987
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