ROK XK: WEEE A PROBLEM FOR IRISH GEOLOGISTS IN POST. 
GLACIAL GEOLOGY, sy T. MELLARD READE, GE, F.G.8., 
F.R.I.B.A. PLATE 19, 
[Read June 16th, 1879.] 
A VERY careful examination of the Post-Glacial Beds on the coasts 
of Lancashire*and Cheshire in 1871,* led me to the conclusion 
that there are remains of two land surfaces which are Se than 
the laying down of the Marine Glacial Drift. 
Subsequent observations have tended to confirm this opinion ; 
the excavations at the Garston Dock, on the east sideof the Mersey, 
five niles above Liverpool, and at the new Bootle Docks at the 
entrance of the Mersey, having thrown considerable light on the 
subject. 
Shortly stated, the surface of the Boulder-clay near the margin 
of the River Mersey is, in various places, cut into gullies reaching, 
in some cases, to a greater depth than the level of low water, and 
these again are filled in with marine silts and sands belonging to 
a system I have named the Formby and Leasowe Marine Beds, 
represented by a large extension of Scrobicularia clays and silts 
below the 25-feet contour on the coasts of Lancashire and Cheshire, 
and usually covered by a bed of peat containing stools of trees in 
situ.t . 
The annexed series of sections (vide Plate 19), taken across 
one of these gullies where it intersected the Garston Dock, will 
illustrate my meaning. 
No. 1. Triassic rock. (Bunter Sandstone.) 
la. Red Sand, debris of the above (probably ground 
moraine). Glacial. 
2. Marine Boulder-clay containing striated boulders 
and pebbles of foreign rocks, 
* Post-Glacial Geology of Lancashire and Cheshire. Proceedings of Liverpool Geol. 
Society. —Session 1871-2 
¢ Quarterly Journal of Geol. Soc. Vol. xxxiy., pp. 147-8. 
