An image of an Ammonite fossil commonly found in the cliffs around Staithes

STAITHES TOWN WEB

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The Cleveland Ironstone Formation

 

 
Lithostratigraphical position of the Cleveland Ironstone Formation
Group Stage Formation Member

LIAS

Pliensbachian

Cleveland Ironstone

Kettleness

Penny Nab

 

 

The Cleveland Ironstone Formation is characterised by rhythmic sequences of dark argillaceous siltstone and silty sandstone capped by twelve relatively thin, but laterally persistent beds, of oodial ironstone. It is confined to the Cleveland Basin, and encompasses a large part of the Upper Pliensbachian Substage. The lower boundary of the Cleveland Ironstone Formation is gradational from the Staithes Sandstone Formation below, and the upper boundary is sharply defined by the incoming of dark mudstones at the base of the Whitby Mudstone Formation.

JNCC - Nature conservation adviser to UK Government

 

 
CLEVELAND IRONSTONE FORMATION with Fossil Horizons
TENUICOSTATUM ZONE IRONSTONE SEAMS BEDDING Fossil indicators

WHITBY MUDSTONE

   

hawskerense

 

 

 

 

 

 

 

 

 

 

P. hawskerense

------------------------------------

----------------------------

 

 

 

 

apyrenum

 

Top Block

 

 

MAIN

A. ferrugineum

 

 

Bottom Block  
 

----------------------------

 

 

 

----------------------------

 

 

PECTEN

 

P. aequivalvis

 

 

 

 

 

 

 

 

----------------------------

 

 

 

 

------------------------------------

----------------------------

 

Highest A. margaritatus

 

gibbosus

TWO FOOT

 

     

----------------------------

 

 

   
 

A. gibbosus, A. ferrugineum

o o o o o o o o

A. margaritatus

RAISDALE

 

 

 

silty shale

   
  o o o o o o o o    
 

shale

   
     
     
 

Lowest A. ferrugineum

o o o o o o o o  
       
       

------------------------------------

----------------------------

 

 

 

subnodosus

AVICULA

 

A. margaritatus

 

O. (ex Avicula)  cygnipes

----------------------------

o  o  o  o  o  o  o  o  o  o  o

 

 

  o o o o o o o o

Highest A. subnodosus

 

 

Shell bed

 

silty shale

 

 

 

 

Shell bed

 

 

 

 

  o o o o o o o o    
 

shale

   
     
     
     

 

o  o  o  o  o  o  o  o  o  o

 

 

       
 

 

Lowest A. margaritatus

 

o  o  o  o  o  o  o  o  o  o

 

 

   

Lowest A. subnodosus

 

 

Abundant A. stokesi var. wertheri

------------------------------------

 

 

stokesi

   

Highest A. stokesi

       
       

 

o  o  o  o  o  o  o  o  o  o

 

 

 

 

 

 

OSMOTHERLY

o  o  o  o  o  o  o  o  o  o

 

 

 

 

 

   

Highest A. stokesi var. wertheri

 

o  o  o  o  o  o  o  o  o  o

 

 

 

 

 

 

 

o  o  o  o  o  o  o  o  o  o

 

 

 

 

 

 

       

 

 

 

 

 

 

 

 

       

 

 

 

 

       
       
       

 

o  o  o  o  o  o  o  o  o  o

 

 

       

 

 

Lowest A. stokesi var. wertheri

 

 

Shell bed & A. stokesi

 

 

       
       

 

sandstone

 

 

 

 

 

 

 

o o o o o o o o o

A. stokesi RARE

 

o o o o o o o o o

 

sandstone

 
  o o o o o o o o
  o o o o o o o o
       
       
       
   

Lowest A. stokesi

------------------------------------

 

 

 

 

figulinum

  o o o o o o o o

Oistoceras figulinum

       

 

 

 

 

 

STAITHES SANDSTONE

sandstone

   
 

 

 

Nodular Concretion

Siderite Nodular Concretion

Siderite concretion embedded in Jurassic silts of the Lower Lias

 

Cleveland Ironstone Mining Museum

 

 

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