A portion of the Upper Olney and Elmwood Members of the Manlius Formation (Lower Devonian, Helderberg Group} in central New York State was deposited as a sequence of upward-shallowing units, 1.5 to 10.5 feet thick, separated by transgressive (deepening) surfaces. These cycles of deposition have been called Punctuated Aggradational Cycles, or PACs, after Goodwin and Anderson (1980b). With each rapid transgression, pronounced changes in paleogeography occurred episodically over the entire study interval (a lateral distance of 50 miles oblique to the basin axis). After each rapid transgression, gradual changes in paleogeography occurred as sediments and/or stromatoporoid bioherms aggraded towards a static sea level. The highest occurrence of vertical burrows and/or the lowest occurrence of well-formed algal laminites defines the maximum normal high sea level position achieved in a PAC. Correlation of PAC sequences on the basis of relative spacings of these maximum high tide positions, resulted in recognition of actual paleotopographies ·developed following each rapid transgression. Shallow marine, level bottom paleocommunities of this study interval were developed allogenically in response to sea level changes associated with the formation of PACs. Long-term, upward-decreasing diversity of taxa occurred within each PAC 8:s the "climax" community of transgressive, short-term succession was modified or replaced in response to a gradual shallowing of the environment. The shallowing was caused by sediment aggradation and/or stromatoporoid growth. / Earth and Environmental Science / Accompanied by one .pdf file: 1) Busch-Supplemental-1978.pdf
| Identifer | oai:union.ndltd.org:TEMPLE/oai:scholarshare.temple.edu:20.500.12613/8441 |
| Date | January 1978 |
| Creators | Busch, Richard Munroe |
| Contributors | Anderson, E. J. (Edwin Joseph), 1939-, Goodwin, Peter W. |
| Publisher | Temple University. Libraries |
| Source Sets | Temple University |
| Language | English |
| Detected Language | English |
| Type | Thesis/Dissertation, Image |
| Format | 63 pages |
| Rights | IN COPYRIGHT- This Rights Statement can be used for an Item that is in copyright. Using this statement implies that the organization making this Item available has determined that the Item is in copyright and either is the rights-holder, has obtained permission from the rights-holder(s) to make their Work(s) available, or makes the Item available under an exception or limitation to copyright (including Fair Use) that entitles it to make the Item available., http://rightsstatements.org/vocab/InC/1.0/ |
| Relation | http://dx.doi.org/10.34944/dspace/8405, Digital copy of print original., Theses and Dissertations |
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