TY  - SER
AU  - Rastall, R.H.   
AU  - Hemingway, J.E. 
TI  - The petrography of the blea wyke series
KW  - Petrology - Blea Wyke series - North East Yorkshire
KW  - Petrological investigation - Dogger - North East Yorkshire
N2  - Summary
The general results which have accrued from this investigation may be summarized as follows: the shaly type of Liassic sedimentation with much pyrite, indicating a quiet sea with abundant sulphur compounds, gradually gave place to a regular and at first fairly steady shallowing of the water with, somewhat later, occasional incursions of strong currents bringing pebbles and broken fossils from an area undergoing active erosion. At the same time the amount of iron introduced, both in solution and in the form of derived ooliths, increased steadily, culminating in the siliceous oolite of the Dogger, which is essentially similar to the rocks composing this formation to the west and north-west
ER  -