72 DR. T. r. SIBLY OX THE FAULTED I]?rEIER OF [Feb. igi2^ 



the Carboniferous Limestone, as described by Mr. AYinwood. The 

 junction between the shales and the limestone is here a fault-plane 

 dipping northwards at about 60^ The nature of the faulted 

 junction between the Grit-&-Shale beds and the Carboniferous- 

 Limestone of the Southern Mass has been discussed above (p. 69). 



Beyond these tunnel-exposures and the sections in Yobster Old 

 Quarry already described (pp. 67, 70), there is no further exposure 

 of the beds of the Grit-&-Shale Mass. The east and w^est extension 

 of the Grit-&-Shale beds shown in my map (PI. II) is based upon 

 the evidence of rock-debris in the soil of the fields. 



Y. BlBLI0C4EAPHY. 



1824. BucKiAND, ^Y., & CoyTEEAEE, W. D. — ' Observations on the SoiTth-\Vesten> 

 Coal District of England ' Trans. Geol. See. ser. 2, vol. i, p. 210. 



1862. Geeenwell, G. C. — ' On the Somersetshire Section of the Bristol Coal- 

 Field ' Trans. N. Engl. Inst. Min. Eng-. vol. x. p. 105. (Newbury, p. 110.) 



1866. Geeexwell, G. C. — ' On the South-Eastern Portion of the Somersetshire 



Coal-Field' Trans. Manch. Geol. Soc. vol. v, p. 34. (Upper Yobster^ 

 p. 36.) 



1867. Beice, Sewaed W. — 'The Coal-Field of North Somersetshire' London. 



(Yobster & Luckington, pp. 43-44.) 

 1867. MooEE, C. — 'On Abnormal Conditions of Secondary Deposits when connected. 



with the Somersetshire and South Wales Coal-Basin, &c. ' Q. J. G. S. 



vol. xxiii, p. 449. (Luckington, p. 453.) 

 1869. Mc]\IuETEiE, J. — ' On the Faxilts & Contortions of the Somersetshire Coal 



Field' Proc. I'.ath Nat. Hist. & Antiq. Field-Club, vol. i (1867-69) no. 3, 



p. 127. 

 1871. ^VooD■WAED, H. B. — 'Eemarks upon Inversions of Carboniferous Strata in 



Somersetshire ' Geol. Mag-, vol. viii, p. 149. 

 1873. A>«'STiE, J. — 'The Coalfields of Gloucestershire & Somersetshire, & their 



Resources' London. (Mendip & Nettlebridge District, pp. 55-63 & 



figs. 13-17.) 



1876. WooDwAED, H. B.— ' Geology of East Somerset & the Bristol Coalfields ' 



Mem. Geol. Surv. ('Carboniferous Limestone of Luckington & Yobster,' 

 pp. 191-96.) 



1877. McMuETEiE, J. — ' On Certain Isolated Areas of Mountain Limestone at 



Luckington & Yobster, in the County of Somerset ' Proc. Bath Nat. Hist. 



& Antiq. Field-Club, vol. iii, p. 287. ' 

 1885. AYi>"wooD, H. H. — ' A Fact in Connection with the Yobster Inversion ' Ibid. 



vol. V, p. 24. 

 1889. I^ssHEE, W. A. E. — 'Some Points of Interest in the Geology of Somerset' 



Eep. Brit. Assoc. (Bath) 1888, p. 659. 

 1891. UssHEE, W. A. E.— 'On the Probable Nature & Distribution of the 



Palaeozoic Strata beneath the Secondary, &c., Eocks of the Southern 



Counties . . . .' Proc. Somerset Arch. & Nat. Hist. Soc. vol. xxxvi, p. 88. 



(Yobster & Luckington, pp. 121-22 & plate.) 

 1891. Wi>-wooD, H. H.— ' Excursion to the Mendip Hills Monday, August 4th, 



1890. Frome, Holwell. Yallis, Yobster, Luckington & Mells.' Proc. 



Geol. Assoc, vol. xi, p. clxxi. 

 1891. WooDWAED, H. B.— ' Brief Notes on the Geology of the Mendip Hills ' IbuL 



p. 481. (Yobster, pp. 485-87.) 

 1893. Wi>'WOOD, H. H. — 'On a Rha^tic Section at Luckington, & Additional 



Notes on the Yobster Quarry ' Proc. Bath Nat. Hist. & Antiq. Field-Club, 



vol. vii, p. 45. 

 1902. McMuETEiE, J.—' The Geological Features of the Somerset & Bristol Coal- 

 field, with special refei'ence to the Physical Geology of the Somerset Basin' 



Trans. Inst. Min. Eng. vol. xx (1900-1901) p. 306. 

 1906. SiBLY, T. F. — ' The Carboniferous Limestone of the Mendip Area (Somerset), 



with especial reference to the Palttontological Sequence' Q. J. G. S. vol.lxii, 



p. 324. (Upper Yobster, p. 350.) 

 Undated. Steaet, F. A. — 'The Mendip Hills & the Somersetshire Coal-Field.' 



Privately printed. Pp. 11 & figs. 



