LOWER LIAS OF ROBIN HOOD'S BAY 99 



590.2 Hard silty shale, with many small sideritic mudstone nodules 0.41 



590.1 Shale, silty, with occasional sideritic mudstone nodules 0.51 



Aegoceras (A.) maculatum (Young & Bird) (7; C.38895. CA 4573-77), lAndwgynoceras sp. indet. (1; CA 4603). 



589 Large sideritic mudstone nodules; a strongly marked band crossing the shore south of Bulmer Steel Hole 0.15 



588 Shale, silty; one very large sideritic mudstone nodule 1 m below top 4.95 



Aegoceras (A.) maculatum (Young & Bird) (5; C.39136, C. 38878-79, CA 4571-72). Androgynoceras heterogenes (Young 



& Bird) (1; C.39136), Liparoceras (L.) sp. indet. (2; CA 4562-63). 



587 Flat septarian sideritic mudstone nodules, some with domed upper surfaces 0.13 



586 Shale, silty 2.29 



585 Flat septarian sideritic mudstone nodules, some with domed upper surfaces, and sometimes forming a continuous bed .... 0.13 



Aegoceras (A.) maculatum (Young & Bird) (1; C.38877). 

 584 Shale, silty 1.45 



ILytoceras sp. indet. ( 1 ; CA 2795), Aegoceras (A.) maculatum (Young & Bird) (2; C.38876, CA 4570). 



583.2 Shale, with scattered sideritic and calcareous mudstone nodules 0.08 



Aegoceras (A.) maculatum (Young & Bird) (2; C. 38871-72), Aegoceras (A.) maculatum (Young & Bird) var. atavum 



Spath (2; C.38873-74: PI. 7, fig. 8), Androgynoceras heterogenes (Young & Bird) (1; C.38875). 



583.1 Continuous bed of sideritic mudstone 0.08 



582 Shale, silty, with small scattered spherical sideritic mudstone nodules 0.25 m below top 1.27 



Liparoceras (L.) cf. naptonense Spath (1; C. 39140), lAegoceras s.l. sp. indet. (1; not registered). 

 581 Flat sideritic mudstone nodules 0.15 



Aegoceras (A.) maculatum (Young & Bird) (2; C.41307, CA 4569; PI. 7, fig. 12). 



Zone of Tragophy 'Hoc eras ibex 

 Subzone of Aegoceras (Beaniceras) luridum 



Shale 1.30 



Aegoceras (Beaniceras) cf. luridum (Simpson) (1; CA 4568), Liparoceras (L.) cf. naptonense Spath (1; C. 39141). 



Flat sideritic mudstone nodules 0.15 



Liparoceras (L. ) sp. indet. ( 1 ; lost). 



Shale 3.40 



Aegoceras (Beaniceras) luridum (Simpson) (6; CA 4565-67), Liparoceras (L.) sp. indet. (1; CA 4561), Lytoceras 



fimbriatum (J. Sowerby) ( 1 ; lost); many large Inoceramus. 



Sideritic shale, with many large (0.6 m diameter, or up to 0.5 m x 1 .2 m) flat, septarian, sideritic mudstone nodules; 



forms a conspicuous bed on the scar just north of Ness Ruck; occasional logs of fossil wood 0.23 



Lytoceras fimbriatum (J. Sowerby) (8; CA 2787-94). 



Shale 0.76 



Lytoceras fimbriatum (J. Sowerby) (2; CA 2785-86). 



Shale, sideritic, with scattered sideritic mudstone nodules 0.08 



Lytoceras fimbriatum (J. Sowerby) (3; CA 2782-84). 



Shale, grey, with a paler and harder middle band; contains several pieces of fossil wood 1.32 



Aegoceras (Beaniceras) luridum (Simpson) (1; CA 4564). 



Subzone of Acanthopleuroceras valdani 



Sideritic shale, with occasional sideritic mudstone nodules; crosses the scar to reach low tide mark at Ness Ruck 0.13 



Liparoceras (L.) cf. heptangulare (Young & Bird) (1 ; CA 4560). 



Shale 0.18 



Scattered sideritic mudstone nodules in shale 0.08 



Shale 0.18 



Scattered sideritic mudstone nodules in shale 0.08 



Lytoceras fimbriatum (J. Sowerby) (3; CA 2779-81). 



Shale 0.30 



Scattered flat sideritic mudstone nodules in shale 0.05 



Lytoceras fimbriatum (J. Sowerby) ( 1 ; CA 2778; PI. 1, fig. 3). 



Shale; contains fossil wood 1.17 



Widely scattered sideritic mudstone nodules in shale 0.10 



Shale 1.02 



Sideritic mudstone nodules, sometimes septarian 0.15 



Liparoceras (L.) heptangulare (Young & Bird) (1; CA 4559), Lytoceras fimbriatum (J. Sowerby) (3; CA 2775-77). 



Shale; contains fossil wood 0.74 



Sideritic mudstone nodules 0.08 



Shale 2.59 



