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Title: Palynology and biostratigraphy of some Upper Devonian deposits of Western New York State and Northern Pennsylvania, U.S.A.
Author: Ahmed, Sarfraz
ISNI:       0000 0001 2420 4372
Awarding Body: University of London
Current Institution: King's College London (University of London)
Date of Award: 1978
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Palynological and bioetratigraphical studies have been made of six sections extending over 4,OOO sq. Kms. through the Upper Devonian in western New York State and northern Pennsylvania, U. S. A. Sediments from this region, which represents the stratotype for the Devonian of North America, have disclosed profuse assemblages of spores and micro-plankton, the former constituting the basis of the present investigations. Sixty-two samples from four formations have been analysed, all of which contained palynomorphs. The sequence of these palynomorphIs indicates complex relationships between marine and continental facies. Acritarchs have been recorded from throughout the sequence apart from the lower part of the Ellicott Member of the Chadakoin Formation but these are used only as environmental indicators and have not been dealt with monographically. The miospores examined are given systematic treatment, illustrated and a range chart has been constructed of their stratigraphical occurrence. Ninty-seven spore forms have been encountered which can be attributed to 33 genera of trilete sporae dispersae; of these eleven species and four varieties are new; sixteen new combinations and one new name is proposed; seven other forms are present but are insufficient numerically to be proposed as new. Three distinct miospore assemblage zones, termed Streelispora catinata - Ancyrospora neograndispinosag Synorisporites flexuosus - Auroraspora varia and (the youngest) Vallatisporites vallatus var. hystricosus - Retispora lepidopliyta, have been recognized within the studied sequence.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available