No description available.

Based upon the examination of the palynostratigraphy of 28 well sections and 6 multi-well studies, the Westphalian sequences in the Southern North Sea Carboniferous Basin are divided into 7 biozones and 12 sub-biozones. These are related, via the known regional northwest European palynostratigraphy, to the chronostratigraphic units of the Westphalian. Analysis of 164 palynological samples from Westphalian sections in the Murdoch Gas Field wells 44/22-1,44/22-3 and 44/22-4, coupled with the recognition of diagnostic macrofossil faunas indicative of the Vanderbeckei Marine Band, allows the direct calibration of part of the palynostratigraphic classification with the chronostratigraphy. Palynological assemblages from these wells contain significant numbers of acritarch and miospore taxa interpreted as being reworked from Lower Palaeozoic, Devonian and early Namurian sediments, possibly during multiple phases of reworking. Assemblages also contain unusually old examples of striate disaccate and monocolpate pollen. One new genus (Ala rasmospo rites) and eighteen new species (Auroraspora? pickerillensis, Dibolisporites ranunculioides, Elaterites anfractus, Endosporites pygmaeus, Hymenospora murdochensis, Knoxisporites biceps, Kraeuselisporites crassus, K. pseudoornates, Marasmosporites semiesus, Neoraistrickia exigua, N. virgultorum, Pityosporites inaequus, Protohaploxypinus masonii, Raistrickia parvula, Savitrisporites semotus, Spelaeotriletes oppletus, S. bulboides and Vestispora dubia) are described.

Thesis (M.S. - Geosciences)--University of Arizona, 1995. / Includes bibliographical references (leaves 28-30).

Thesis--Copenhagen. / Part of illustrative matter fold. in pockets. Vol. 1 has summary in Danish. Bibliography: v. 1, p. [76]-79; v. 2, p. [35]-36.

Thesis (Ph. D.)--University of Oklahoma, 1992. / Includes bibliographical references.

Thesis (Ph. D.)--University of Wisconsin--Madison, 1971. / Typescript. Vita. Description based on print version record. Includes bibliographical references.

Thesis (doctoral)--Swedish University of Agricultural Sciences, 2006. / Thesis documentation sheet inserted. Appendix consists of reproduction of one published paper and three manuscripts, all co-authored with others. Includes bibliographical references. Issued also electronically via World Wide Web in PDF format; online version lacks appendix of papers.

This project describes the Holocene environmental and pedogenic history of the Hiraethog Moors, particularly in relation to archaeological evidence. Ironpan stagnopodzol, brown podzolic and stagnohumic gley profiles have been studied from Aled Isaf together with cores from Cefn Mawr and Llyn y Foel-frech. Physical, chemical, clay mineralogical, micromorphological and palynological analyses have been undertaken and a time framework has been achieved by radiocarbon dating, including AMS 14C dating of ironpan and charcoal samples. A search for tephra has been undertaken and, although none was located, the presence of a biolith bloom in a core from Llyn Cororion on the Arfon Platform raises the possibility of a geochemical reconstitution of a low volume, fine-grained tephra fall. Parent material was reworked by periglacial processes during the Late-glacial resulting in an oriented fabric, cracked stones and a redistribution of clay and fine siltsized material. Until 6-7,000 years BP soils remained shallow and stony, with a clay mineralogy dominated by hydrous mica and chlorite. Between 6,000 and 4,000 years BP erosion led to deeper soil profiles on the lower slopes, burying flints and charcoal, and the woodland was periodically disturbed by humans. However, man was relatively inactive between 4,500 and 3,500 years BP. At 3,500 years BP woodland cover declined rapidly due to human activity with a subsequent change to a Gramineae- and then a Calluna-dominated vegetation community. In low lying sites the result was increased waterlogging, gleying, structural collapse and the build up of organic matter at the surface i. e. stagnohumic gley. In better drained sites podzolisation occurred to produce the Bs horizon, i.e. brown podzolic soil. In profiles most intensively leached, mor humus and then peat accumulated. This induced surface waterlogging resulting in a mobilisation of iron, structural collapse and the formation of an Eag horizon, within which chlorite was destroyed and hydrous mica weathered to vermiculite, and an ironpan i.e. ironpan stagnopodzol. Through the integration of soil and pollen analysis, 14C dating and archaeological information our understanding of soil development and human activity on Hiraethog has been increased.

Made available in DSpace on 2014-06-11T19:26:14Z (GMT). No. of bitstreams: 0 Previous issue date: 2007-09-14Bitstream added on 2014-06-13T18:29:44Z : No. of bitstreams: 1 neregato_r_me_rcla.pdf: 3215097 bytes, checksum: b469137c7c84150cb141f60ffc9e57da (MD5) / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) / São apresentados os resultados de análises palinológicas realizadas em 37 amostras de testemunhos dos furos de sondagem no sul do Município de Congonhinhas (PR), nas formações Serra Alta, Teresina e Rio do Rasto (somente no Membro Serrinha), abrangendo uma extensão vertical de aproximadamente 600 m. A primeira formação revelou-se estéril. Entre as 32 espécies descritas, três provavelmente são novas, cinco foram previamente registradas em níveis estratigráficos mais baixos da Bacia do Paraná e 7 espécies eram apenas conhecidas em outros países. As assembléias palinológicas coadunam com a idade aproximadamente mesopermiana previamente interpretada para os depósitos. A priori, todo o intervalo estudado faz parte da Zona Lueckisporites virkkiae e as novas espécies registradas para a bacia apresentam potencial para futuros refinamentos bioestratigráficos. Diferenças na abundância relativa de espécies de esporos permitiram visualizar dois possíveis intervalos, um com predominância de Laevigatosporites vulgaris, a grosso modo na Formação Teresina, e o outro dominado por Thymospora, no Membro Serrinha. Os esporos com afinidade a filicíneas predominam largamente em relação aos de outros grupos e também são bem mais abundantes que grãos de pólen. Este resultado dá margem a muitas interpretações, tendo em vista que o quadro florístico sugerido pelos macrofitofósseis é distinto e que as condições deposicionais dos folhelhos estudados provavelmente não foram proximais. / Palynological analyses of 37 core samples of two boreholes in Congonhinhas Municipality (PR) from the Serra Alta, Teresina and lower Rio do Rasto formations (total thickness= ~600 m) are presented. The first formation did not provide fertile samples. From the 32 described species, three probably are new, five were previously recorded at lower stratigraphic levels of the Paraná Basin and 7 species were only known in other countries. The microfloristic assemblages are consistent with the approximately Mid Permian age anteriorly interpreted for the succession. A priori, the whole studied interval belongs to the Lueckisporites virkkiae Zone and the species now recorded in the Paraná Basin bear potential for a possible future biostratigrafic improvement. Two intervals were recognized in the studied succession according to the relative abundance of some spore species: one interval (roughly coincident with the range of the Teresina Formation) is characterized by the predominance of Laevigatosporites vulgaris, and the second (in the Serrinha Member, lower Rio do Rasto Formation) is dominated by Thymospora. Spores with affinities to ferns are predominant in relation to other groups and are also more abundant than pollen grains. This result is not easily interpreted because de macroflora is relatively distinct and the dark shales used for the palynological analyses probably were not originated in very proximal depositional environments.

No description available.