LOWER LIAS OF ROBIN HOOD'S BAY 103 



Apoderoceras aculeatum (Simpson) ( 1 ; CA 4023), Phricodoceras comutum (Simpson) ( 1 ; CA 4070; PI. 7, fig. 2). 



524.3 Shale, with a few calcareous or sideritic mudstone nodules, and some 'nests' of pyrites 0.51 



Phricodoceras cf. comutum (Simpson) ( 1 ; CA 4054), Apoderoceras aculeatum (Simpson) ( 1 ; CA 4022; PI. 7, fig. 1 ). 



524.2 Sideritic mudstone nodules; some pyrites 0.04 



524.1 Shale 0.52 



Phricodoceras cf. taylori (J. de C. Sowerby) ( 1 ; CA 4069), Apoderoceras sp. indet. ( 1 ; CA 4047). 



523 Flat sideritic mudstone nodules 0.06 



Apoderoceras aculeatum (Simpson) (1; CA 4021). 



522.3 Shale, with occasional sideritic mudstone nodules 0.74 



522.2 Flat sideritic mudstone nodules, with circular septarian jointing 0.04 



522.1 Shale, with occasional sideritic mudstone nodules, some with viens of pyrites, and some 'nests' of pyrites 0.66 



Apoderoceras subtriangulare (Young & Bird) ( 1 ; CA 4020). 



521 Flat sideritic mudstone nodules, with circular septarian jointing 0.05 



Tragophylloceras numismale (Quenstedt) (1; CA 2757). 

 520.7 Shale 0.48 



Apoderoceras subtriangulare (Young & Bird) (2; CA 4018-19; PI. 6, fig. 4). 



520.6 Sideritic mudstone nodules 0.07 



Apoderoceras subtriangulare (Young & Bird) (2; CA 4016-17). Tragophylloceras cf. numismale (Quenstedt) 

 (1;CA2756). 



520.5 Shale, with many scattered sideritic mudstone nodules 0.36 



Apoderoceras subtriangulare (Young & Bird) (1; CA 4015), Apoderoceras sp. indet. (4; CA 4043-46), Phricodoceras cf. 

 nodosum (Quenstedt) (1; CA 4061), Gemmellaroceras sp. indet. (2; CA 4192-93), Tragophylloceras numismale 

 (Quenstedt) (4; CA 2752-55). 



520.4 Sideritic mudstone nodules, with an irregular top surface; similar to bed 525 about 50 m to the north, 



but less conspicuous 0.10 



Apoderoceras sp. indet. ( 1 ; CA 4042). 



520.3 Shale, with many sideritic mudstone nodules 0.82 



Apoderoceras subtriangulare (Young & Bird) (1: CA 4014), Tragophylloceras numismale (Quenstedt) (3; CA 2749-51). 



520.2 Sideritic mudstone nodules 0.04 



Tragophylloceras numismale (Quenstedt) (1; CA 2748). 



520.1 Shale 0.64 



Apoderoceras subtriangulare (Young & Bird) (3; CA 401 1-13), Tragophylloceras numismale (Quenstedt) (1; CA 2747). 



519 Clay; forms a conspicuous parting in the cliff, but difficult to recognize on the scars 0.03 



518 Band of sideritic mudstone, with irregular top surface; outcrops at the foot of a low scarp face that forms the northern 



side of a gully 0.04 



517.7 Shale 0.66 



Apoderoceras subtriangulare (Young & Bird) (1; CA 4010), Tragophylloceras numismale (Quenstedt) (1; CA 2746). 



517.6 Flat sideritic mudstone nodules 0.05 



517.5 Shale 0.15 



517.4 Sideritic mudstone nodules 0.05 



517.3 Shale 0.23 



Gemmellaroceras sp. indet. (2; CA 4190-91). 



517.2 Sideritic mudstone nodules 0.05 



Gemmellaroceras sp. indet. (1; CA 4189). 



517.1 Shale 0.23 



516 Large flat sideritic mudstone nodules 0.06 



515.7 Shale 0.26 



515.6 Sideritic mudstone nodules 0.08 



515.5 Shale 0.26 



Tragophylloceras cf. numismale (Quenstedt) ( 1 ; CA 2745). 



515.4 Occasional sideritic mudstone nodules in shale 0.08 



515.3 Shale 0.26 



515.2 Flat sideritic mudstone nodules 0.08 



515.1 Shale 0.26 



514 Flat sideritic mudstone nodules 0.04 



513.7 Shale 0.58 



Apoderoceras sp. indet. (1; CA 4041 ). 



513.6 Sideritic mudstone nodules 0.08 



Apoderoceras sp. indet. (1; CA 4040). 



513.5 Shale, with a few sideritic mudstone nodules 0.13 



513.4 Sideritic mudstone nodules 0.10 



513.3 Shale 0.08 



513.2 Occasional sideritic mudstone nodules in shale 0.05 



