Freshwater Bivalves

[Calum McLennan]

Recently I visited Dinckley Bridge, near Hurst Green, Lancashire.

 

Here, there is a geotrail online and also a number of online papers mentioning this site with regards to goniatites.

I didn't manage to find any goniatites, but in the Bowland Shale in the stream just west of Dinckley Hall, just a few metres from its confluence with the Ribble, I found a number of fossils.

 

Occasional bits of plant matter as seen in the last two photos, but mostly loads of what I presume to be freshwater bivalves.

 

Am I right in thinking these are a Carbonicola species?

Any guidance welcomed, including how I could go about finding where the goniatites are.

 

[anonaddict]

why the assumption of specifically *fresh water* bivalves?

[westcoast]

@anonaddictThere is a long history of assuming certain Carboniferous bivalves are non marine due to their close association with coal horizons. This has led to a circular argument. @TqB might be able to say more.

[doushantuo]

Westcoast is right in saying that the mere presence of dulcaquicole species does NOT of necessity imply that the area where they were found was "non- marine " .

For studies with regards to the the variability of (ontogenetic young stges of) carboniferous bivalves :

from Weigelts study on juvenile Carbonicola.

Presumably you are familiar with the publications of  the likes of Bennison or R.C. Eagar on Carbonicola

 

 

edit : As regards faunal content of mid/central UK,  Jack Walker, who is (or was) involved in assessment of the Bowland hydrocarbon play,might be able to help

you

edit: as might Paul Wignall, who knows his facies analysis

 

Edited 20 hours ago by doushantuo

[DPS Ammonite]

31 minutes ago, doushantuo said:

Weigelts study on juvenile Carbonicola.

Presumably you are familiar with the publications of  the likes of Bennison or R.C. Eagar on Carbonicola

What do both publications say about whether the clams are marine or not?

[westcoast]

1 hour ago, doushantuo said:

Westcoast is right in saying that the mere presence of dulcaquicole species does NOT of necessity imply that the area where they were found was "non- marine " .

For studies with regards to the the variability of (ontogenetic young stges of) carboniferous bivalves :

from Weigelts study on juvenile Carbonicola.

Presumably you are familiar with the publications of  the likes of Bennison or R.C. Eagar on Carbonicola

 

 

edit : As regards faunal content of mid/central UK,  Jack Walker, who is (or was) involved in assessment of the Bowland hydrocarbon play,might be able to help

you

edit: as might Paul Wignall, who knows his facies analysis

 

Thank you for using the word dulceaquicole!

[Calum McLennan]

I think you guys may be right about the hasty freshwater assumption. Most studies of the Bowland Shales I've seen seem to find marine bivalves even among plant remains. Mostly they find Posidoniid bivalves, which do seem to fit the description well especially in comparison to others mentioned, but I can't exactly claim to be knowledgeable enough to say with even remote certainty.

[minnbuckeye]

2 hours ago, westcoast said:

Thank you for using the word dulceaquicole!

Can't find a definition of dulceaquicole!

[Coco]

Hi,

 

Perhaps "freshwater" ?

 

Coco

[Fossildude19]

Dulce acuicola is Spanish for "Fresh Water", or "Sweet Water"