Lower Cambrian Trilobites from the Illtyd Formation, Wernecke Mountains, Yukon Territory
Lower Cambrian Trilobites from the Illtyd Formation, Wernecke Mountains, Yukon Territory

Author: William Harold Fritz

Publisher: Geological Survey of Canada

Published: 1991

Total Pages: 86

ISBN-13:

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This study focuses on a stratigraphic section in the Wernecke Mountains that represents peak transgression at the end of the Early Cambrian and thus peak availability of data. The section has a great thickness of upper Bonnia-Olenellus Zone strata containing numerous trilobite-bearing beds. The trilobites described in this study are from a 946 m thick stratigraphic section in the Lower Cambrian Illtyd Formation. Trilobites belonging to 14 genera (2 new) and 38 species (15 new) are described and a medial Bonnia-Olenellus Zone age near the base of the Illtyd Formation is documented.

Cambrian Ocean World
Cambrian Ocean World

Author: John Foster

Publisher: Indiana University Press

Published: 2014-06-06

Total Pages: 457

ISBN-13: 0253011884

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This volume, aimed at the general reader, presents life and times of the amazing animals that inhabited Earth more than 500 million years ago. The Cambrian Period was a critical time in Earth's history. During this immense span of time nearly every modern group of animals appeared. Although life had been around for more than 2 million millennia, Cambrian rocks preserve the record of the first appearance of complex animals with eyes, protective skeletons, antennae, and complex ecologies. Grazing, predation, and multi-tiered ecosystems with animals living in, on, or above the sea floor became common. The cascade of interaction led to an ever-increasing diversification of animal body types. By the end of the period, the ancestors of sponges, corals, jellyfish, worms, mollusks, brachiopods, arthropods, echinoderms, and vertebrates were all in place. The evidence of this Cambrian "explosion" is preserved in rocks all over the world, including North America, where the seemingly strange animals of the period are preserved in exquisite detail in deposits such as the Burgess Shale in British Columbia. Cambrian Ocean World tells the story of what is, for us, the most important period in our planet's long history.

Lower Paleozoic Stratigraphy of Northern Yukon Territory and Northwestern District of Mackenzie
Lower Paleozoic Stratigraphy of Northern Yukon Territory and Northwestern District of Mackenzie

Author: D. W. Morrow

Publisher:

Published: 1999

Total Pages: 216

ISBN-13:

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Previous studies of the lower Palaeozoic in the Eagle Plain & Richardson Mountain area of north-west mainland Canada in the Yukon & Northwest Territories have dealt either with outcrop or surface sections, or with subsurface well sections, but did not integrate these data. This has led to the development of inconsistent stratigraphic nomenclatures and an inability to form a consistent sequence stratigraphic model for the lower Palaeozoic in this area. This bulletin presents a stratigraphic synthesis based on data from surface exposures in the mountains surrounding Eagle Plain and on subsurface borehole data from beneath Eagle Plain and from the interior plain bordering the east flank of the Richardson Mountains. An internally consistent stratigraphic framework is developed, including reaffirmation of some previous nomenclature, restriction to certain areas of others, and definition of new stratigraphic units. The positions of carbonate-to-shale transitions which commonly exert a strong control on structural evolution and on the occurrence of sedimentary mineral deposits & hydrocarbons are more accurately delineated. A detailed sedimentological analysis of the Ogilvie Formation, the most prospective lower Palaeozoic unit for the occurrence of hydrocarbon reservoirs, is also included, along with a map of thermal maturity at the top of the unit.

The Geology, Mineral and Hydrocarbon Potential of Northern Yukon Territory and Northwestern District of Mackenzie
The Geology, Mineral and Hydrocarbon Potential of Northern Yukon Territory and Northwestern District of Mackenzie

Author: Donald Kring Norris

Publisher:

Published: 1997

Total Pages: 420

ISBN-13:

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Describes the regional geology of the northern Yukon and north-western District of Mackenzie, based on original field work in the early 1960s and updated in light of more recent detailed investigations. After introductory chapters on the original reconnaissance survey, the physiographic setting of the study area, and the geological setting (tectonics, seismicity, tectonostratigraphic sequences), subsequent chapters describe the geology (including stratigraphy, paleontology, paleogeography, lithology, and tectonics, as applicable) of individual geological eras or periods from the Proterozoic to Tertiary. The following chapters cover the geology of the Beaufort Sea continental shelf; the White, Barn, and Campbell uplifts; the petrology of the northern Yukon intrusive suite; and the mineral and hydrocarbon potential of the study area. Includes a catalogue of stratigraphic sections and an index.