Ammonite: Psiloceras cf. planorbis

Photograph of ammounite: Psiloceras cf. planorbis View larger image
Specimen id: 79 When found: Monday, December 29, 1958
Where found: From block on shore, Flat Scars, Robin Hood’s Bay, North Yorkshire.
Geological Horizon:

Lower Jurassic
Hettangianian Stage
Redcar Mudstone Formation
Psiloceras planorbis Zone
Grid Reference: NZ965033 [Map]
Notes:

These specimens were recovered from loose blocks of rock washed up on to Fat Scar and Low Scar at Robin-Hood’s-Bay. It was assumed that the loose blocks were from offshore reefs of the Planorbis Zone. This however has always felt to be unlikely and the specimens may need to be re-identified.
Source Collection: The Robinson Ammonite Collection