ZONE OF AMALTHEUS MARGARITATUS. 



97 



which arc limited to the Yorkshire series, as Vraster carinakis, Wr., Astropecten 

 Hastingsice, Forb., Opldoderma Milleri, Phil., Aspidura loricata. Will., and Ophiura 

 Murravii, Forb., all collected from the Marlstone series near Staithes, where one of the 

 most instructive sections of the Margaritatus-heAs is exposed in the cliff. The following 

 section, by Messrs. Tate and Blake,^ has more detail than mine, so I have selected it. 



Section of ihe Margaritatus-^ec^s at Staithes. 



No. 



Petrology. 



Thick- 

 ness. 



Organic Remains. 



9 



10 



11 



12 

 13 

 14 

 15 



16 

 17 

 18 

 19 

 '20 

 21 

 22 

 23 

 24 

 25 



2G 

 27 

 28 

 29 



Zone of Atnaltheus apinatiis. 



Bottom seam of impure ironstone : shells 

 enveloped in a calcareous matrix ... 



Blue marly shale ; top surface i 

 crowded with Belemnites ; 



Blue shale ) 



Fine-grained argillaceous limestone ... 



Blue shale 



Band of clay-ironstone, slightly spec- 

 kled with white grains ; forms a scar 

 on tlie flat shore 



Black splintering shale 



Oval argillaceous limestone doggers \ 



Black splintery shale ) 



Clay-ironstone in two blocks, weather- 

 ing brick-red 



Shale 



Argillaceous limestone dogger 



Shale 



Small doggers 



Shell-bed 



Sandy shale with scattered doggers ... 



Blue, with doggers and shell masses ... 



Shale, with doggers and shell-masses... 



Dogger band 



Marly shale 



Sandy shale and doggers 



Calcif'erous sandstone 



Sandy marls 



Dogger band 



Sandy marls , 



Blue limestone 



Striped sandy shales, with fossiliferous 



doggers and their sandstones 



Reddisii sandstone with bands of fossils 

 Grey sandstone and flags, false bedded 



Calciferous sandstones 



Soft marly sandstone and calciferous 



sandstone bands 



ft. in. 



4 3 







1 



5 



5 







10 



9 



8 



5 



4 



2 







1 











8 







2 







n 







i.i 



2 



11 



6 







10 



6 







4 



8 







7 











3 



2 



9 







3 



2 







1 







17 



2 



2 



G 



6 



6 



6 



2 



4 







Atnal. margaritatus, Belemnites, Pecten cequivalvis, 

 Gnjj}hcea cijmLiuiu, Cypj-icardia cucullata. ' 



Amal. margaritatus, Belemnites, Pecten cequivalvis, \ 

 fossil Wood. I 



A'inal. margaritatus, Protocurdium truncatum, 

 Monotis cggnijjes. 



Amal. margaritatus, Gryphcea cymbium, Frotocar 

 cardium truncatum. 



GryphcEa cymbium. 



Belemnites and oysters. 

 Gresslya Seehacliii. 



Gresslya Seebac/iii, Protocard. truncatum, Pecten 

 cequivalvis, Macrodon intermedius. 



Amal. margaritatus, A. Capricornus, and many 

 otiier fossils. 



Gresslyce. 



Amal. margaritatus, Chemnitzia Blainvillei, Proto- 



cardium truncatum. 

 Dentalium giganteum, Protocardium truncatum, 



Lima Hermanni, Monotis cygnipes, &c. 



At the base of the clifl; on the south side of the harbour, the following lower 

 beds are exposed at low tide. 



1 'Yorkshire Lias,' p. 107. 



13 



