TATli ON THE GEOLOGY OK BEAUNELL. 
59 
Alumina, Magnesia, & Iron . 
Alumina, Magnesia,Iron,and 
Potash 
Alumina, Iron, and Potash . 
Alumina, Iron, Potash, 
LiTHiA, AND Manganese . 
Magnesia, Lime, and Protox- 
ide Ikon 
Magnesia and Iron 
34. Ripidolite. 
35. Ghlurite. 
3(). Biotite or Magnesia-Mica. 
37. Finite. Altered Cordierite, some Mg re- 
placed by K. 
Tourmaline. A mineral of various and com- 
plicated chemical constitution. Contains 
Na witli k, also about 9 per cent, of 
Boracic acid, and 3 per cent, of Fluorine. 
Potash-Mica. Has sometimes Mn. 
Lepidolite, or Lithia^Mica. Also Hydro- 
fluoric acid. 
Hornblende. Often some A^. 
A ugite. ditto. 
Biallage. Generally some A=l, also H and 
Mn. 
Hijperstheiie. Generally Al and Mn. 
Olivine. 
38. 
39. 
40. 
41. 
42. 
43 
46. Bronzite. Some H. 
THE GEOLOGY OF BEADNELL, IN THE COUNTY OF 
NORTHUMBERLAND, WITH A DESCRIPTION OF SOME 
ANNELIDS OF THE CARBONIFEROUS FORMATION. 
By George Tate, Esq. F.G.S. 
Read before the Berwickshire Naturalislis Club, at Beadnell, in May, 1858. 
A section along the coast from Ebbs Nook to Annstead Bay, of 
nearly one and a half miles in length, exhibits a fine series of rocks 
belonging to the Mountain Limestone Formation. Thick sandstones 
and limestones, shales with ironstone, and coal-seams are intercalated 
■with each other ; and these strata are traversed by a lead-vein and a 
basaltic dyke. As we wander along the shore, we meet with evidences 
of sea-deposits in the limestones and calcareous shales, wherein are 
embedded many corals and moUusks ; the sandstones, shales, and coal 
afiford relics of the vegetation of the Cai'boniferous Era ; some slaty 
sandstones give distinct indications of ancient shallow seas and coast- 
lines, whereon the waves broke gently and over which worms crawled ; 
while the basaltic dyke tells of the play of internal forces, rending 
asunder the vast mass of stratified rocks, and pouring molten lava 
into the fissures. 
