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Blastoid

Ontario's Hungry Hollow "formation" ?

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Blastoid

The experts on the Devonian site at Arkona, Ontario, Canada, list what used to be called the Hungry Hollow Formation as the Hungry Hollow Member.

Can anybody supply a reference to a paper detailing this reclassification?

Secondly, is the HH a member of the Widder, or the Arkona Formation?

Thanks a ton for the info!

Blastoid

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Northern Sharks

I do know that the Hungry Hollow member belongs to the Widder formation, but I don't have the reference explaining why it lost formation status

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erose

I would contact the Canadian Geological Society or maybe the closest university with a stratigraphy department. Names and rankings for stratigraphic units change over time. And some rock units can have "formation" status in one region but only member status in another. There has been a push for many years to get away from formations defined by paleontology. Lithography (rock types) rules.

I wrote a paper years back on the differences between lithostratigraphic and chronostratigraphic units. The former is based on rocks and the later on time. A lithostratigraphic unit can actually cross chonostratigraphic boundaries over it's geographic outcrop. Look at the history of the Cincinnatian nomenclature for a great example. Compare the units used by Ohio, Kentucky and Indiana for the Upper Ordovician rocks. The rocks don't change at the border line, but the names do.

One of the best sources I found for the most "recent" understanding & nomenclature for a region's geology is in the Guide books that various geological societies publish for annual conferences. I learned a great deal about NY State that way.

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crinus

The paper that deals with the change of the Hungry Hollow Formation back to member status of the Widder Formation was published in the last couple of years by Carlton Brett of the University of Cincinnati. In that same paper he changed the Arkona "Shale" to Arkona Formation. Those of us that collect the Arkona know very well that the Arkona Formation does not behave like a typical shale.

I will see if I can find the new reference and post it here.

crinus

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crinus

ok, i got the information.

SEQUENCE STRATIGRAPHY OF THE MIDDLE DEVONIAN AT THE BORDER OF THE

MICHIGAN BASIN: CORRELATIONS WITH NEW YORK AND IMPLICATIONS FOR SEA-LEVEL

CHANGE AND PALEOGEOGRAPHY

1Alexander J. Bartholomew, 1Carlton E. Brett, 1Michael DeSantis, 2Gordon C. Baird, and 3Cameron Tsujita

Northeastern Geology & Environmental Sciences, v. 28, no. 1, 2006

This is a very long technical paper. I quickly scanned through it and both changes are in this paper. The Arkona "Shale" was changed to Arkona Formation to include a limstone base and thus no longer is the shale only. I would still question calling the mud a shale.

I can't post the article here because of it's size and copyright issues.

crinus

Edited by crinus

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Shamalama

Hmmm... can't seem to find any info on the article or originating organization on the web. Any hints? I do accept .pdf scans sent to my home e-mail. ;)

There is an interesting book out there called Devonian Events and Correlations but it's a bit pricey for me right now.

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crinus

Hmmm... can't seem to find any info on the article or originating organization on the web. Any hints? I do accept .pdf scans sent to my home e-mail. ;)

There is an interesting book out there called Devonian Events and Correlations but it's a bit pricey for me right now.

I would need an email address.

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