The study of the Gaspe Limestones reveals that a varied and rich assemblage of "chitinous" microfossils is present within most samples. The fossil evidence for hydrozoans and pterobranchs is presented relying heavily upon infra-red and scanning electron microscopical studies. Using similar methods, melanosclerites are described, their taxonomic status reinterpreted and their affinity reinterpreted. An extensive ultrastructural study of Chitinozoa biology has lead to an ontogenetic, and phylogenetic reinterpretation. They are concluded to be the extinct representatives of the protozoan sarcodines. The relationship of their preservation to early diagenesis of the substrate are also discussed. A new classification is presented as is the new hypothesis for their extinction at the end of the Devonian. The biostratigraphy of the Gaspe Limestones using chitinozoans is used and the evidence for the Silurian-Devonian boundary is presented as is the discontinuity of the Gaspe Limestones especially for the Roncelles Mbr. The evidence for the Silurian age of a fault block is also discussed.
| Identifer | oai:union.ndltd.org:USASK/oai:usask.ca:etd-10212004-000459 |
| Date | 01 January 1995 |
| Creators | Cashman, Patrick Bradley |
| Contributors | Sarjeant, William |
| Publisher | University of Saskatchewan |
| Source Sets | University of Saskatchewan Library |
| Language | English |
| Detected Language | English |
| Type | text |
| Format | application/pdf |
| Source | http://library.usask.ca/theses/available/etd-10212004-000459 |
| Rights | unrestricted, I hereby certify that, if appropriate, I have obtained and attached hereto a written permission statement from the owner(s) of each third party copyrighted matter to be included in my thesis, dissertation, or project report, allowing distribution as specified below. I certify that the version I submitted is the same as that approved by my advisory committee. I hereby grant to University of Saskatchewan or its agents the non-exclusive license to archive and make accessible, under the conditions specified below, my thesis, dissertation, or project report in whole or in part in all forms of media, now or hereafter known. I retain all other ownership rights to the copyright of the thesis, dissertation or project report. I also retain the right to use in future works (such as articles or books) all or part of this thesis, dissertation, or project report. |
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