ZTbc Strata cyposeb in conetructing tbc ffilton to 
avonmoutb IRailwa^. 
By J. W. Tutcher. 
CONTENTS. 
1. Introduction. 
II. Description of the Exposures— 
(A) Filton, chiefly Lias. 
(B) Charlton, chiefly Rhsetic. 
(C) Hallen, Keuper. 
III. Correlation of the Rh^tic at Charlton' with Pylle Hill. 
IV. Local Variations in thickness of the Rustic. 
V. Position of the Bone Bed. 
VI. Paleontological Notes. 
I. INTRODUCTION. 
In the Quarterly Journal of the Geological Society for 1902 and 
1904 Professor S. H. Reynolds and Dr. A. Vaughan described the 
strata exposed in making the South Wales to London direct line 
between Filton and Wootton Bassett. Dr. A. Rendle Short also 
described in detail a Rhsetic section on the same line at Stoke Gifford. ^ 
The present paper may be regarded as supplemental to those com- 
munications ; its purpose being to record the strata cut through in 
making a westward extension of this line from Filton to Avonmouth. 
II. DESCRIPTION OF THE EXPOSURES. 
(A) The Filton Section. 
The first cutting West of Filton Station is crossed by the main 
road from Bristol to Gloucester at a point half-a-mile North of Filton 
Church, In this cutting the basal beds of the Lower Lias, and their 
junction with the Rhietic can be seen. 
The strata in this section take the form of a low anticline, the 
Upper Rhsetic being exposed only in the middle portion of the 
cutting. 
So far as it can be seen, the Rhsetic here agrees precisely with 
the records of the Stoke Gifford section, one mile East.^ The 
only fossils found are Ostracods ; these are well preserved and fairly 
common at certain levels in the limestone band. 
The junction of the Upper Rhsetic with the Lias is well marked 
by the presence of the Cotham marble (Landscape stone). 
^Quart. Journ. Geol. Soc. Vol. lx (1904) p. 175. 
2 Quart. Jour. Geol. Soc., Vol. lx. (1904), p. 175 and p. 195. 
