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186 PROCEEDINGS OF THE GEOLOGICAL SOCIETY. .DeC. 13,
Annecy le Vieux, an ascending succession from neocomian to over-
lying nummulitic rocks with Pectens ; but the broken nature of the
banks at this locality, and the little time at my disposal, prevented
the tracing of the intermediate strata. On approaching the village
of Thones, it was however seen, that after several flexures the upper
strata of neocomian limestone with Caprotina ammonia, forming a
striking ridge on the north side of the valley, and having here a north
and south strike, plunged south-east at an angle of 55° to 60°, throw-
ing off on its surface the other strata exhibited in this diagram.
Fig. 6.
c d e f f g g
f, f. Numraulite limestone, g. Flysch .
e. Transition bed.
d. Inoceramus white limestone or chalk.
c. Gault and greensand.
a Sib, Neocomian limestones.
On ascending to the little depression above the surface of the upper
neocomian (6), it was evident that the excavation was due to the beds
being less coherent than the hard limestone (b & d) above and below
them. M. Pillet and myself then detected greensand terebratulse,
which, when combined with the position and character of the strata,
led me to believe that this band of dark shale, impure limestone, and
sandy green marlstone (c) was the representative of the gault and
upper greensand usually exhibited in these Alps. These beds gra-
duate upwards into yellowish limestone, which is surmounted by a
cream-coloured compact limestone vrith flints weathering white (d),
in which we found several specimens of Inocerami, the best-preserved
of which was the I. Cuvieri.
Here then we had under our feet a band (d) which by position and
fossils must fairly stand for the chalk. In proceeding upon the dip
this limestone is seen gradually to change its colour from white to
brown (e), and in a short space, without the slightest break or un-
conformity of the strata, the overlying mass is charged with num-
mulites. The nummulitic strata (/") becoming sandier upwards,
contain also certain Pectens, and these shelly beds are overlaid by a
zone of coralline concretionary sandy limestone, and the latter by a
strong-bedded, dark grey, white-veined limestone. This nummulitic
group, so intimately linked on to the Inoceramus limestone (or chalk)
in its lower beds, is quite as intimately connected with the strata by
which it is overlaid, i. e. with micaceous sandstones, marls, impure
limestones and conglomerates, which represent a portion of the
"flysch of the Alps (^)." These flysch beds contain certain scales
of fishes enumerated by Agassiz, and some casts of shells. They are,
in short, identical with the strata which at the desert near Chambery
had been pointed out to me as the recognized lower beds of the

• • flysch" of Savoy, where they equally overlie and are equally con-
    

nected with bands of nummulite limestone.