Notices of Memoirs — Hugh Miller — Carboniferous Series. 119 



be equally applicable to South Northumberland, and to the whole of 

 what deserves to be distinguished as the Northumbrian Type of the 

 Carboniferous Limestone series, in contrast with the Yorkshire type 

 and Scottish type. It is amplified in some not very important 

 details, as set forth in the following table : — 



Carboniferous Limestone Series — Northumbrian Type (Northumberland, 

 East Cumberland, and Liddisdale). 



[Reference: — H. Miller, Article "Northumberland," Encyclopaedia Britannica, 

 9th edition.] 



f Felltop or Upper Calcareous Division : — From the Millstone 

 I Grit to the zone of the Great Limestone. Sandstones 



Upper I and shales; one or more beds of marine limestone, in- 



Limestone ^ eluding the Felltop Limestone ; some coals 



Feet 



Series. 



350-1200 



1300- 2500 



Lower 



Limestone 



Series. 



Calcareous Division : — From the Great Limestone to the 

 I hotto7n of the Dun or Redesdale Limestone. Many beds 

 L of good marine limestone ; sandstones and shales ; coals 

 f Carbonaceous Division (Scremerston Beds of North North- 

 umberland] : — From the Dun or Redesdale Limestone to 

 Tate's " Tuedian Grits." Strata prevalently carbon- 

 aceous ; limestones chiefly thin, many of them con- 

 taining vegetable matter ; coals 800 — 2500 



Tuedian Division or Tweed Beds : — Upper Tuedian or Fell 

 Sandstone Group, the " Tuedian Grits" of Tate: — From 

 the Carhonaceoui Group to the Cement- Limestones. 

 Great belt of massive grits (Tweedmouth, Chillingham, 

 the Simonside and Harbottle Hills, the Peel and 

 Bewcastle Fells). Shales greenish and reddish as well 

 as carbonaceous-grey ; coals rare, thin, or absent . 



Lower Tuedian or Cement- Limestone Group : — From, the base 

 of the Grits downwards. Cement-stone bands passing 

 (ilothbury, Bewcastle) into limestones; coals very 

 rare ; generally some coloration of the shales and 

 sandstones 



Basement Conglomerates ( Upper Old Red Sandstone) ; local . 



500—1600 



530-1500 

 0— 500 



The relation borne to the lines of this extended classification by 

 Prof. Lebour's Bernician limit, so far as he has hesitatingly defined 

 it by horizons,^ is shown in the following diagram : — 



CA R BON I rCROUS LIMESTONE 



NORTHUMBERLAND. 



CALCAREOUS DiViSION. 



, . ■ .1 - r-i— T^-r- I I I 



KeJesciiile I^imestone 



CARBorjACEraus djviSioin^ 



TUCDIAN 

 OiVlSIOM. 



Tell 



.^<fv;. 



6'' PUs>iatts Dii-n Liraest* 



■ i</^. HavbottJe •^' 



BASEMENT CONGLOMEPUKTES 



* " To the north of Berwick, the lowest accepted Bernician limestone is the Dun 

 limestone, well known throughout the northern part of Northumberland, but only 

 with great reserve to be correlated with a bed of the same name in the Upper North 

 Tyne district (the Plashetts Dun Limestone of the diagram). This is the limestone 



