90 THE HAWKESBURY SANDSTONE. 
the contour of the dunes, and thus, where these have been perfett 
domes or mounds, dip outwards in all directions, with curvel 
urfaces from a central vertical axis. Such an . 
constantly to be seen where sections of the older rocks are expose 
I saw especially good instances of it in a small island, near Castle 
Island in Harrington Sound. Where banks or long ridges of sand 
have been formed, strata following the surfaces of these in indlim- 
tion are produced. 
All kinds of curious irregularities in g t are to be found 
in the bedding of the strata, resulting evidently from the encroach- 
ment of one dune upon the edge of another, or the action of 
various eddies of wind, or the burying of a small dune m the 
edge of a larger one. In some cases an already hardened o* 
Castle Harbour will show. I saw no rock in Bermuda witha 
conglomerate is bein formed on the shore in some places ® 
coral islands, 
_, t Major-General 
inclination in its bedding of more than 35° 30’, which is not much 
more than the slope of some of the sand-hills, 
Dana terms this calcareous sand rock  drift-sand rock.”* 
Nelson terms it “eolian formation,” in his account of 
geology of the Bermudas. + | iy | 
_ Jukes observed that in Heron Island the main strata of the 
fareous rock composing the island dipped outwards eo 
ongitudinal axis of the island towards the shore, north ands ‘at 
with an inclination of from 8° to 10°, and Nelson observed ; 
dispositions of the strata at Bermuda. 
: | idation, from 
perk ca Bermuda presents all degrees of consolidation, i 
uw. ‘The 
and is quarried for the construction of forts Lil 
red fragments of pond, lus shell are especially well pres” 
aS al bed of Sag aa ata Genth ot 40 feet belo Bee 
level im excavating for dockyard purposes, being evid sot : 
aneient peat bed, such as those which now occur in the pri 
overwhelmed with sand. Besides these primary pe 
* Dana, Corals and Coral Islands, edition 1875, p. 182. ‘“ ee” 
Geog. Soc., London, vol, V, 1840, 
