Cleveland Ironstone Formation at Staithes

 

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 concretion embedded in Jurassic silts of the Lower Lias at Staithes

Siderite concretion embedded in Jurassic silts of the Lower Lias at Staithes

Image by dated: July, 2004

 

 

Cleveland Ironstone Mining Museum