62 THE HAWKESBURY SANDSTONE, 
the great divisions, which are so distinct that one would sleds ? 
suppose that they were huge slabs of rock laid upon one ie 
the strata themselves are entirely made up of false bedding. This 
is a lamination which divides the beds into strata about 5 
- inches thick or even less. The lamine are never horizontal, and — 
never continuous across the great layers. The material of the 
rock appears aa a sandstone, but under the microscope is seen 0 
consist of fragments of shells and shore debris, with grains of fine 
fossils, or at least they are rare. Professor R. Tate, who first 
asserted e formation to be eolian, found small shells in ee 
and these were land shells—not marine, and of the kind now 
existing on the coast. When I first saw this deposit : ‘gi 
it to have been derived from marine currents ; 
knowledge of the floor of the ocean shows us as 5 me ae 
do not leave such stratification. Besides the land shells, and the 
only an indurated portion of the sand dunes with which #8 
always associated. It is an aerial rock, and is stratified by the 
d alone. The only difference between this rock and 
Hawkesbury sandstone is, that it contains a large pee of 
lime, with scr eb coal occasionally. a 
Bermuda sandstones.—In the islands of Bermuda ae 
formation is met with. Although sa! very low, some att 
of these islands rise to 250 feet above the sea-level, consisting ® 
various kinds of limestone rock, oiakies soft and friable, but 
very often hard ae even crystalline. It consists of eds which 
sometimes dip as much as 30°, and exhibit great contortions — 
ides, with aueh false bedding. It has been put meter 
doubt, a a —~ continued series of observations, that te | 
to the wind, which blows up the sand from the pe 
and which pee is derived from coral and shells. ites rain OF 
solves portions of the lime and consolidates it. In this lim oe | 
at Bermuda, as well as in the calcareous rocks of the sou uth hich 
of Australia, vvbs have those ap eh stalagmitic concretions» oth : 
look like roots. In Bermuda the acrial rock contains @ of 
some 2 feet ak under coral roc ae and resting on rer : 
ar ous sandstone, probably due to the decomposition of 
u rom 
Aerial origin of agen rocks.—We see iow — 
trations what are acters of aerial or wl 
They are destitute of fossils, except land-shells or ae 
They are not upheaved. They are most of all 
* Jones’ Guide to Bermuda, More likely the red earth is due 1 
pers. ergs of vegetation which grew when this lower da 
