Genesis And Environmental Position Of The Algal Mounds Of The Stonehenge Formation

Carbonate mounds of the Lower Ordovician (Canadian) Stone­henge Formation contain evidence of algal origin in the form of convex upward growth structures, stromatolites, and filamentous algae. Facies distribution and thickness relationships of the Stonehenge show that the mounds formed near the margins of a distinct sedimentary basin on the Cambro-Ordovician carbonate platform of Pennsylvania. Interpretations of the sedimentary environments of the major lithologies deposited in the seaway indicate that the Stonehenge beds were deposited in facies mosaic style. Five major lithologic associations have been described and interpreted in this framework. 1. dolostone cycles ... supratidal facies, 2. siliceous dolomitic pelmicrite ... subtidal flat facies, 3. intrasparudite-intrasparite ... subtidal channel facies, 4. massive calcilutite ... algal mound facies, 5. cryptalgal calcarenite ... mound debris facies. The positions of these lithologies in the stratigraphic succession of the Stonehenge indicate that the mounds formed in the base of subtidal channels at the climax of a regional transgression.

Grantor dc:publisher

Temple University. Libraries

Year dc:date.issued

1973

Author dc:creator

• Manns, Francis T.

Advisor dc:contributor.advisor

• Goodwin, Peter W.

• Geology
• Environmental science
• Geoscience

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• 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.

Licence dc:rights.uri

• http://rightsstatements.org/vocab/InC/1.0/

Language dc:language.iso

eng

Handle dc:identifier.uri

http://hdl.handle.net/20.500.12613/8430

OAI record oai:identifier

https://scholarshare.temple.edu/server/oai/request?verb=GetRecord&metadataPrefix=dim&identifier=oai%3Ascholarshare.temple.edu%3A20.500.12613%2F8430