Reviews — The Geology of Manchester. 81: 



Faunal List of the Lilleshall Limestone. 



CORALS. 

 Syringopora ci. geniculate/,, Phillips. Lithostrotion junceum (Fleming). 

 Alveolites septosa (Fleming). Lonsdalia floriformis (Martin). 



BRACHIOPODS. 

 Spirifer planicosta (M'Coy). Productus giganteus, Martin. 



S. bisulcatus, Sowerby. 



This assemblage is sufficient to fix the horizon as being D2. The 

 remarks given above concerning the absence of Campophyllum, 

 Lonsdalia duplicata, Zaphrentids, and other Midland genera, are 

 apparently also applicable to the Lilleshall exposures. 

 Summary op Conclusions. 



The Carboniferous Limestone of the Wrekin area represents part 

 of the Lonsdalia sub-zone of other Midland districts. It has been 

 deposited in shallow water, but without contemporaneous dolomitiza- 

 tion, which frequently accompanies shallow-water conditions. 



The Millstone Grit came on during upper D 2 times, and there are 

 in the area no deposits similar to either D 3 or Pendleside develop- 

 ments in some other districts. 



The fauna of the limestone is in many respects similar to, but in 

 other respects different from, that of the D 2 eastern facies developed 

 in Derbyshire. The limestones of The Hatch, near the Ercall, are 

 of a more normal type than the deposits of Lilleshall, and are, 

 therefore, more reliable as a means of comparison with the 

 Carboniferous Limestone of other areas. 



ZRIE'V^IIE'WS. 



I.— The Geology oe Manchester as revealed by Borings. By 

 G. Hickling, D.Sc, F.G.S. Trans. Inst. Min. Eng., vol. liv, 

 pp. 367-417, 1918. 



THIS paper gives the results of an investigation carried out 

 during the last two years in the Geological Department of the 

 University of Manchester. It refers mainly to the Permo-Triassic 

 belt, which separates the coalfields of Ashton and Pendleton, con- 

 taining the Manchester coalfield as an island in the centre.^ A 

 detailed and careful consideration of all available records of borings 

 has led to the following among other conclusions. There is no 

 evidence of unconformity between the Permian and Bunter. The 

 Bradford fault is certainly, and the Irwell fault probably, to a large 

 extent pre-Permian. There is some evidence that the Upper Coal- 

 measures extend close to the surface from Collyhurst, under 

 Cheetham, to Agecroft, and a considerable area of productive measures 

 is probably within easy reach north of this line. An important 

 N.W.-S.E. fault bounds the area just mentioned on the £T.E., and 

 the productive measures are probably too deep for some distance 

 north of this line. The total thickness of the Permian strata is 

 about 1,000 feet, while the Bunter Sandstones measure at least 

 760 feet. Part of the "Permian" Sandstones probably belong to 

 the Upper Coal-measures. P- H. B. 



decade vi. — VOL. VI. — NO. II. 6 



