, 6 tweets, 4 min read Read on Twitter
Like most people, my absolute favourite western North American sequence of Middle Jurassic to Upper Jurassic age marine shale, sandy shale, sandstone & limestone has always been the Sundance Formation - & today I will get to tramp an entire stretch of it! #JurassicWyoming
Woohoo - Jurassic oysters! #SundanceFormation
Woohoo - the internal skeleton of a belemnite! #SundanceFormation
Amazing to think this was once a sea teeming with life... #SundanceFormation
This is an amazing site: the mille-feuille rock formation is strikingly similar in formation & date to that found in the Solnhofen quarry, where Archaeopteryx was discovered. Early days, but perhaps there’s a pterosaur, or even a proto-bird waiting to be found! #JurassicWyoming
Gryphaea - aka Devil’s Toenails - studding a stretch of the #SundanceFormation. They’re very common in Britain so slightly disorienting to find them in Wyoming...
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