Dear Dario you may find a large amount of info reading my past publications and references within them.

Dear Darío,

In the supplement Sedimentary Record March 2009 (The Prospect of Compact

Estuarine Lagerstätten, by: Savrda et al), you can find an interesting article of levels containing fossils at sequential stratigraphic surfaces. Although no strictly shell beds, they play a similar role in regard you´re looking for.

Dear Dario,

Any fossil record investigation needs a special attention to taphonomy which should suggests is the paleontological material in situ or ex situ also the preservation conditions which enables us to have a (complete) assemblage or an incomplete assemblage. Generally I can suggest few publications about the freshwater and terrestrial Quaternary shells record.

Dear Dario,

Frank Wesselingh has done some work on this in Lake Pebas and in European localities. Check his publications or contact him directly ([email protected]) with your question.

I've found this recent paper to be particularly helpful. Talks about time-averaging of shell beds and their relation to the sequence stratigraphic framework. http://geology.gsapubs.org/content/41/2/239.short

Hello

You should look at the taphonomic works of Guillermo Mendez and about the time averaging notions with Flessa

Here are some references of interest for your work

FÜRSICH F.T. (1978) – The influence of faunal condensation and mixing on the preservation of fossil benthic communities. Lethaia 11: 243-250.

KIDWELL S. M., BOSENCE D.J.W. (1991) – Taphonomy and time-averaging of marine shelly faunas. In: P. Allison and Derek Briggs eds. Taphonomy : relasing the data locked in the fossil record, Plenum Press, New York, 115-209.

FLESSA, K.W. (1993). Time-averaging and temporal resolution in recent shelly faunas. In : Taphonomic approaches to time resolution in fossil assemblages. S.M. Kidwell,A.K. Behrensmeyer (eds), 9-33.

The rate off seri taipan depends on shell functional morphology.

The sequence boundary of type two may be recognised at the base or top of this shell if it's as coquina band within hard ground surface?

WITH BEST REGARDS

further info in papers by Kidwell

Dear Dario, some suggestions can be provided in TINTORI A. (1995) - Biomechanical fragmentation in shell-beds from the Late Triassic of the Lombardian Basin (Northern Italy). Preliminary report. Rivista Italiana di Paleontologia e Stratigrafia, 101: 371-380 and Angiolini L., Balini M., Garzanti E., Nicora A., Tintori A. (2003) Gondwana deglaciation and opening of Neotethys: the Al Khlata and Saiwan Formations of Interior Oman. Palaeogeography Palaeoclimatology Palaeoecology, 196, 1-2, 99-123.

I also suggest this book: Stratigraphic Paleobiology .... Patzkowsky and Holland 2012, where you could also find references to relevant papers.

Some info reported by JAMES H. NEBELSICK

Dear Dario,

Among other things, one I pay attention when I see a shell bed is, for example, if the two parts of the bivalves (if you have some) are still connected. It is a good indication that your shells are not reworked. Then you can interprate this level according to the right taphonomic and palaeoenvironnemental context in your stratigraphy.

Best regards,

Laurent Bruxelles.

Dear Tivadar,

I'm interested about the publications you could indicate about the freshwater and terrestrial Quaternary shells record. Can you give us some, please?

Many thanks to other colleagues for your helpfull answers!

Best,

Laurent Bruxelles.

Regarding the relationships between shell beds and sequence stratigraphy you can also refer to the paper: Zecchin M. and Catuneanu O. (2013), High-resolution sequence stratigraphy of clastic shelves I: Units and bounding surfaces. Marine and Petroleum Geology, v. 39, p. 1-25.

Thank you Massimo, I have already read your papers and they were pretty much useful. I'm trying to look for relationships between Lower Cretaceous shell beds from the Neuquen Basin in Argentina and the well-known sequence stratigraphic schemes of this basin.

Dear Dario

Here is a published thesis comparing the cyclostratigraphy in the Jurassic from Switzerland and lagoon deposits from Belize mainly based on the shell taphonomy.

https://doc.rero.ch/record/20815/files/StienneN.pdf

I think that you will find some more interesting things in the bibliography part ;)

She has also published

Strasser, Védrine, Stienne 2011Rate and synchronicity of environmental changes on a shallow carbonate platform (Late Oxfordian, Swiss Jura Mountains), Sedimentology, 59, 185-211.

Best regards

Bastien

Thank you Bastien!