Thesis (M.S.)--University of Wisconsin, 1958. / eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (p. 149-154).

Thesis (M.S.)--University of Cincinnati, 2003. / Includes bibliographical references (leaves 54-62).

Archaeocyathids are an extinct group of animals that lived and thrived in the warm, clear marine waters of the Lower Cambrian. In general shape, they resemble rugose corals, but in skeletal details, numerous differences between these groups exist, i.e. inner and outer walls, central cavities, parieties, etc. are unique to Archaeocyathids. The Archaeocyathids which are the subject of this thesis were collected by Dr. H. Little from the South Fork of the Salmo River, and from north of Colville, Washington. In the Salmo area, they occur in a narrow band of limestone at the base of the Laib group. The Colville collection is from an outcrop of Old Dominion limestone. The identification and description of the species present in these collections are the main considerations of the thesis. Two new species are described, Ethmophyllum lineatus and Syringocnema colvillensis. The former species occurs in the Lower Cambrian limestone of the Laib group, Salmo area; the latter is reported from the Old Dominion limestone of the Colville area. Archaeocyathids may be useful in the correlation of Lower Cambrian formations, providing further accurately located (stratigraphically) collections are made. At present, insufficient stratigraphic data are available to erect Archaeocyathid zones. However, some attempt to correlate the known Archaeocyathid occurrences is made. In correlating the ten known Archaeocyathid occurrences from Washington to the Yukon Territory, it is suggested that the most southerly, Colville, Washington, is stratigraphically lower than the Salmo occurrence, and that the latter is, in turn, stratigraphically lower than the northern localities. These northern occurrences are considered to be late Lower Cambrian. The age assigned to the northern localities is, in general, based on stratigraphic and paleontological evidence other than that afforded by Archaeocyathids. The occurrences of Archaeocyathids in the northern part of the Cordillera are given below with their related lithologic unit where possible: 1) Colville, Washington - Old Dominion limestone 2) Salmo, B.C. - lower part of the Laib group 3) Dogtooth Range, B.C. - Donald formation 4) Quesnel Lake, B.C. - Cariboo series 5) Sinclair Mills, B.C. - 6) Pine Pass, B.C. - Misinchinka schists 7) Aiken Lake, B.C. - upper Wolverine complex 8) McDame Creek, B.C. - Atan group 9) Wolf Lake, Yukon Territory - Lord's group B and c units 10) Quiet Lake, Yukon Territory – It is believed that these occurrences outline the western edge of the geosyncline present in this region in Lower Cambrian time. / Science, Faculty of / Earth, Ocean and Atmospheric Sciences, Department of / Graduate

Trilobites and other fossils from three measured sections in the Murray Range, Pine Pass map-area, British Columbia, are described and their zonal significance is discussed. Zones represented by fossil assemblages are the Upper Olen-ellus subzone (uppermost Lower Cambrian), the Ogygopsis klotzi and Tonkinella stephensis subzones of the Bathyuriscus-Elrathina zone (upper Middle Cambrian), the upper Conaspis zone and Ptychaspis subzone of the Ptychaspis-Prosaukia zone (Upper Cambrian, Franconian Stage), the Lower or Middle Saukia zone (Trempealeau-an Stage), and Zones A, B and D of the Lower Ordovician (Canadian Series). The lower Middle Cambrian, Dresbachian and lower Franconian zones, and the Lower Ordovician Zone C, appear to be missing. Early Cambrian assemblages show some affinities with faunas of the southern hemisphere (the archaeocyathid genera Sigmocya-thus, Syringocnema and Monocyathus) and eastern Canada and the United States (species of Bonnia, Kootenia, Paedeumias and Eo-ptychoparia). However, these affinities become weaker in Middle Cambrian and later assemblages, and all the present collections are predominantly Cordilleran in character. They are considered representative of the intermediate extracratonic biofacies realm as defined by Lochman-Balk and Wilson (1958). The sections provide a further example of the transition, well-known in other parts of the Canadian Cordillera, from Lower Cambrian argillaceous and arenaceous clastic rocks to more or less argillaceous limestone and dolomite of the Middle Cambrian and later Series. Throughout Cambrian and early Ordovi-cian time the original area represented by the present sections was covered by miogeosynclinal seas which progressively encroached upon the craton. This marine transgression was interrupted at times, and the comparatively local uplift of the Peace River Arch was responsible for extreme reduction in thickness of the Middle and Upper Cambrian portions of the early Palaeozoic section. / Science, Faculty of / Earth, Ocean and Atmospheric Sciences, Department of / Graduate

A DISSERTATION SUBMITTED TO THE FACULTY OF SClENCE, UNIVERSITY OF THE WITWATERSRAND, JOHANNESBURG, FOR THE DEGREE OF DOCTOR OF PHILOSOPHY. / An assemblage of Cretaceous, Diptera, recovered from the sediments of the Orapa Diamond mine, Botswana, is described. The fossil Diptera are placed In the following families: Tipulidae, Empididae, Hybotidae, Bibionidae, and possibly the Mycetophilidae, Rhagionidae and Anisopodidae. A new pulid species, Helius botswanensis (Tipulidae, subfamily Limoniinae), is described; it is the oldest representative of the subfamily. (Abbreviation abstract) / Andrew Chakane 2019

No description available.

No description available.

No description available.

Llandeilo and Caradoc beyrichiocope Ostracoda are described from England and Wales. They are referred to 3 suborders (Palaeocopa, Binodicopa, Eridostraca), 8 families (Eurychilinidae. Ctenonotellidae. Tetradellidae (with 1 new subfamily); Bolliidae, Aechminidae, Circulinidae and Spinigeritidae; Eridoconchidae). 38 genera (7 new and 2 new subgenera) and 52 named species (35 new). Thirteen other forms are referred mainly to the Palaeocopa under open nomenclature, or are simply recorded. Sampling was concentrated on the sandstone/limestone sequences of Llandeilo and Caradoc age of South Wales. Superbly preserved silicified faunas were extracted using acid techniques. Casting methods extended sampling into the predominantly sandy facies of Caradoc age of the Welsh Bc.;erland, North Wales and northern England. Largely neglected,these ostracode mould faunas have provided an excellent source of material. Scanning electron microscopy has been extensively employed to illustrate the ostracodes recovered. The biostratigraphy of Llandeilo and Caradoc beyrichiocopes from England and Wales is documented. They are useful in local stratigraphic correlation and may prove helpful in defining the base of the Caradoc Series in South Wales. Their potential for inter-regional correlation is limited. British Ordovician ostracodes support other biogeographic evidence that during Llandeilo to Ashgill times, southern Britain moved closer to the Baltic and North American plates, as indicated by a breakdown in the provinciality of the British faunas.

<p> Forensic scientists, archaeologists, and paleontologists are interested in understanding fluvial bone transport respectively to find human remains, determine if human behavioral information persists in skeletal assemblages, or to estimate the temporal and spatial resolution of fossil assemblages. This dissertation reviews what we think we understand about fluvial bone transport, then tests the hypotheses that: 1. Elongate and concave bones adopt preferred orientations relative to flow, 2. There is a relationship between bone shape and relative transportability, and 3. There is a relationship between bone density and relative transportability. Generally two research techniques prevail, 1. Flume observations, and 2. Fluvial seeding trials. Flume data are often poorly reported, have small sample sizes, and the conditions within the flume are usually incompletely reported. Fluvial seeding trial results are characterized by a series of well documented anecdotes, largely due to specimen loss causing small sample sizes. The results from these techniques are contradictory so research to clarify what conclusions are valid is needed. Three techniques were utilized to address these problems, river surveys, river seeding trials, and river seeding trials using bone casts. No correlation between elongate bone orientation (N=157) and flow direction was observed, though concave bones (N=89) oriented &sim;70% concave down, while flat bones lay flat against the bed. Similarly, there was no association between bone shape and transportability. Denser bones were less transportable than less dense bones however there was substantial overlap in transportability between dense and less dense bone casts. These results suggest our understanding of bone transport is simplistic and incomplete. This is probably because most research has utilized flumes which provide unrealistically uniform conditions, so flume results are a poor analog for the heterogeneous natural environment. Moreover, bones are constantly changing density which is a variable previous authors have more or less assumed was constant. This simplifying assumption is violated so frequently that this assumption has led the scientific community to assume bone transport behaviors that are not frequently observed in natural systems. Ultimately the analytical tools based on this incomplete understanding of bone transport should be discontinued or validated to avoid spurious conclusions when interpreting skeletal assemblages.</p>