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Hajar | all galleries >> Palaeogalleries >> Bear Gulch > Arborispongia delicatula Rigby, with bivalves, 30 cm. Bear Gulch, Fergus County, Montana, USA.
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22-AUG-2004

Arborispongia delicatula Rigby, with bivalves, 30 cm. Bear Gulch, Fergus County, Montana, USA.

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1/125s f/2.8 at 9.7mm iso100 full exif

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hajar24-Jan-2014 22:45
Thank you. Interesting that it appears on so many old labels. I do not know Montana geology, but see that there is an organic-rich Tyler Formation directly overlying the Heath. Perhaps an earlier stratigraphic nomenclature?
dickdoc 15-Jan-2014 18:22
It is Heath Formation. There is no Taylor formation there
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