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gray scaglia. At the same locality exist indurated red marls and 
sandstone grits; and at the north-north-west foot of Mount Atairo 
is another bed of conglomerate, containing chiefly boulders of green- 
stone, and a greenish granular rock, but inclosing also rounded 
masses and pebbles of the gray scaglia of the neighbouring hills. 
The greenstone was not seen by Mr. Hamilton 27 sztw. 
2. The scaglia limestone is chiefly developed in the lofty ridge of 
Mount Atairo (anc. Mons Atabyrius), which is from 3500 to 4000. 
feet in height. The summit is a narrow ridge about two miles 
long, extending from north-east to south-west, or nearly in the di- 
rection of the axis of the island. The bed dips from 15° to 20° to 
the south-east. The upper portion consists of thick-bedded gray 
scaglia, witheut flints; lower down occurs a thinly-laminated lime- 
stone, with tabular masses or beds of flint; and still lower, the beds 
are again thicker and the flints are nodular. The total vertical di- 
mensions of these deposits is from 800 to 900 feet. Beneath them, 
the scaglia is interstratified with a red marly limestone, and further 
down the hill are thick beds of scaglia without flints. Below the 
village of Embona, situated to the north-west of the mountain, a 
greenish compact sandstone crops out from beneath the limestone 
of Mount Atairo, and dips to the south-east. The range of hills 
to the north-north-east consists also chiefly of the gray limestone, 
which rests on the red and brown sandstones. Mr. Hamilton did 
not ascertain how far the formation ranges to the north-west. 
The Acropolis of Camiro, on the east coast of the island, and six 
miles north of Lindo, stands upon an insulated table-rock of whitish 
compact scaglia, encircled at its base with tertiary strata. 
3. The blue limestone is classed provisionally by Mr. Hamilton 
with the secondary rocks; but he is of opinion it may be of the same 
age as the limestone of Halicarnassus, and belong to a much older 
system. It occurs extensively along the east coast, particularly near 
Lindo, where it forms high and steep hills, against which remnants 
of horizontal strata of tertiary limestone rest at a considerable height. 
The Acropolis of Lindo is situated upon beds of it, having an incli- 
nation of 20° to 25° to the north-west. It occurs likewise further 
north, between Rhodes and Archangelo, where it forms the high 
ridge of hills about two miles from the shore, and the low ridge of 
rocky islets in the middle of the plain, and parallel to the coast. 
OxpeR Rocxs.—The only locality at which these are satisfac- 
torily shown, is half-way between Archangelo and Lindo, and close 
tv the shore at the bottom of a deep bay. At this point the blue 
limestone, which in its lowest beds is hard and siliceous, and dips 
between 60° and 70° to the north-west, is underlaid constantly by 
a hard, black, schistose, crystalline rock, like the limestone of the 
Bosphorus. 
In conclusion, Mr. Hamilton gives the following general state- 
ments: 1. The scaglia is more abundant in Rhodes and the south 
of Asia Minor than further north, and is apparently a prolongation 
of the scaglia which constitutes the mass of Mount Taurus. Num- 
mulites have been found in it near Adalia, and Mr. Hamilton ob- 
