Download or read book Silicified Silurian Odontopleurid Trilobites from the Mackenzie Mountains written by Brian D. E. Chatterton and published by Calgary : Canadian Society of Petroleum Geologists ; [Toronto] : Geological Association of Canada. This book was released on 1983 with total page 126 pages. Available in PDF, EPUB and Kindle. Book excerpt: The trilobites (a division of arthropoda) described range from early Llandovery to early Ludlow. They were collected from five sections of the Mackenzie Mountains, NWT and almost all were extracted from argillaceous limestones.
Download or read book Silicified Upper Ordovician Lower Silurian Ostracodes from the Avalanche Lake Area Southwestern District of Mackenzie written by Murray John Copeland and published by Geological Survey of Canada. This book was released on 1989 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt: Description of a silicified ostracode fauna from platform carbonates of the Whittaker and Delorme formations of the Selwyn Basin. Fourteen new genera and 45 new species are described, with a total of more than 120 taxonomic combinations reported.
Download or read book Conodonts from Ordovician Silurian Boundary Strata Whittaker Formation Mackenzie Mountains Northwest Territories written by Godfrey S. Nowlan and published by Geological Survey of Canada. This book was released on 1988 with total page 122 pages. Available in PDF, EPUB and Kindle. Book excerpt: The taxonomic work provides detailed descriptions and illustrations of almost fifty species belonging to twenty-three genera. One new genus and five new species are erected. The resulting taxonomic framework is used to provide a correlation with strata of this age in other sedimentary basins in Canada and elsewhere.
Download or read book Telychian Rocks of the British Isles and China Silurian Llandovery Series written by Charles Hepworth Holland and published by National Museum Wales. This book was released on 2002 with total page 216 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Silicified Late Ordovician Trilobites from the Mackenzie Mountains Northwest Territories Canada written by Brenda Hunda and published by . This book was released on 1983 with total page 87 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Silicified Middle Ordovician Trilobites written by Harry Blackmore Whittington and published by Geological Society of America. This book was released on 1953 with total page 183 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Silicified Late Ordovician Trilobites from the Mackenzie Mountains Northwest Territories Canada written by Brenda Hunda and published by . This book was released on 1983 with total page 87 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Heterochrony in Evolution written by Michael L. McKinney and published by Springer Science & Business Media. This book was released on 2013-11-21 with total page 353 pages. Available in PDF, EPUB and Kindle. Book excerpt: ... an adult poet is simply an individual in a state of arrested development-in brief, a sort of moron. Just as all of us, in utero, pass through a stage in which we are tadpoles, ... so all of us pass through a state, in our nonage, when we are poets. A youth of seventeen who is not a poet is simply a donkey: his development has been arrested even anterior to that of the tadpole. But a man of fifty who still writes poetry is either an unfortunate who has never developed, intellectually, beyond his teens, or a conscious buffoon who pretends to be something he isn't-something far younger and juicier than he actually is. -H. 1. Mencken, High and Ghostly Matters, Prejudices: Fourth Series (1924) Where would evolution be, Without this thing, heterochrony? -M. L. McKinney (1987) One of the joys of working in a renascent field is that it is actually possible to keep up with the literature. So it is with mixed emotions that we heterochronists (even larval forms like myself) view the recent "veritable explosion of interest in heterochrony" (in Gould's words in this volume). On the positive side, it is ob viously necessary and desirable to extend and expand the inquiry; but one regrets that already we are beginning to talk past, lose track of, and even ignore each other as we carve out individual interests.
Download or read book Sedimentary Cover of the Craton in Canada written by D.F. Stott and published by Geological Society of America. This book was released on 1993 with total page 713 pages. Available in PDF, EPUB and Kindle. Book excerpt: The early chapters of the volume present data and interpretations of the geophysics of the craton and summarise, with sequential maps, the tectonic evolution of the craton. The main body of the text and accompanying plates and figures present the stratigraphy, structural history, and economic geology of specific sedimentary basins and regions. The volume concludes with a summary chapter in which the currently popular theories of cratonal tectonics are discussed and the unresolved questions are identified.
Download or read book Palaeozoic Vertebrate Biochronology and Global Marine non marine Correlation written by Alain Blieck and published by . This book was released on 2000 with total page 598 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Silurian Wenlock Ludlow encrinurine trilobites from the Mackenzie Mountains Canada and related species written by Gregory D. Edgecombe and published by . This book was released on 1993 with total page 172 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Silurian Trilobites from the Northern Yukon Territory written by Rolf Ludvigsen and published by Royal Ontario Museum, 1990. c1989.. This book was released on 1990 with total page 364 pages. Available in PDF, EPUB and Kindle. Book excerpt: Silurian trilobites are described from two contrasting facies in the northern Yukon Territory: basinal sediments of the Road River Formation at Prongs Creek and shallow-water limestones of the Illtyd Range. An Otarion Association from dark grey, argillaceous lime mudstones (Lower Silurian) consists of Kosovopeltis, Otarion (Songkania), Cromus, and Leonaspis. These trilobites are identical to those described by Pousen (1934) from his Cape Schuchert Formation of North Greenland. A Stenopareia Association from off-white biosparites (Lower Silurian) includes Stenopareia, a bumastine, Kosovopeltis, and Scotoharpes. A Hedstroemia Association occurs in an Upper Silurian debris flow. It includes Hedstoemia, Prantlia, Balizoma, and Paracybantyx. An incomplete ontogeny of Kosovopeltis borealis (Poulsen) comprises a protaspis and four different transitory pygidia. The bumastine genus Paracybantyx is new. New species are Paracybantyx asulcatus, Stenopareia illtyd, Hedstroemia kutchini, H. sourdoughi, and Prantlia vagrans.
Download or read book Palaeontographica Canadiana written by and published by . This book was released on 1983 with total page 126 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Cambrian Jurassic Fossils Trace Fossils and Stratigraphy from Greenland written by John S. Peel and published by . This book was released on 1988 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Palaeontographia italica written by and published by . This book was released on 1996 with total page 386 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Systematics of Silurian Lichid Trilobites from the Mackenzie Mountains Canada written by Margaret Campbell and published by . This book was released on 1994 with total page 394 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Llandovery Trilobites of England and Wales written by N. J. Curtis and published by . This book was released on 1997 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt:
