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CLASS II.—TRANSITION ROCKS.

Chief

rocks,

different

varieties

of

rsorae crystalline mi- < nerals, magnetic iron-
pretty often <. ore, &c.
here and
f there, evi-
denly arena-
ceous or frag-

mentary.

Subordi-
nate, or
short beds
of

f some crystalline mi-
. < nerals, hollow-spar,
C iron-pyrites, dipyre.'

STRATIFIED OR NEPTUNIAN ROCKS.

Formation Of Talcose And Quartzose Rocks, And Of Clat-slate.
Ex.:Alps, Pyrenees, Ardennes, Brittany, Bohemia, Scotland, &c.

f Mica-slate,
Talc-slate,

quartziferous,
Chlorite-slate . .

quartziferous,
Quartz ( granular,
rock, ( compact,
C common,
Gneiss, < talcose,
'granitic,
Clay-slate, . . .
quartziferous,
f Whet-slate.
Flinty-slate.
Alum-slate.

Slate with black chalk or anthracite.—
N. B. Here first trace of coaly mat-
ter.

Calcareous clay-slate (Alps).

'granular (Pyrenees, Ap- f some crystalline mi-
pennines, Alps). < nerals, hornblende,au-
subgranular (Scotland) Cgite, garnet, ffce.
Limestone, compact, with small (some crystalline mi-
sparry veins, . . < nerals, felspar (Coldu
brecciated (Alps, Ap- C Bonhomme).
pennines).

(granular. r some crystalline mi

l compact .... J nerals, tremolite, veGypsum (Alps of Savoy, t granular. (_ suvian, &c. l_ Pyrenees, Tarascon), ( compact.

N. B. Diamond geognostical position.
This formation passes into the following.

Dolomite,

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Granite—porphyritic C dome-like masses, bed- ■% rarely with
and sometimes < like veins, veins, and > tertiary basalt
cellular,' small veins (Erzge.) J veins (Arran).

graphic. N. B. Imbedded and

with pinite. changed slaty rock.

Sienite—imbedded masses, bed-like veins, large and small veins
Diabase (Ophite of the Pyrenees), especially in short beds
or bed-like veins, and veins,
globular imbedded masses (Island of Corsica).
Hyperstenic sienite or selagite—dome-like or imbedded
masses, (Scotland, F.ngland, Germany), and veins (Scot)."
Diallage rock or Euphotide,—dome-like or imbedded masses

(Appennines). pj
Serpentine,—dome-like or C many minerals imbedded, as
imbedded masses, and < hornblende, augite, chromate of O
bed-like veins, Iiron, and chrysoprase. —

Augite rock,—dome-like or t N. B. A breccia composed of gra" Q
cylindrical masses, and 3 nular limestone and augite accom"
veins (Pyren. Piedmont, tpanies this rock (Port de L'herz). &
D . .„ /-bed-like veins, and veins^ N. B.Sometimes
forphynes(»yn 1 of the age of recent grey-f slate altered at'
tlyan, <-"°ro.-< wacke (Vendue, Erzgeb. (thecontact(Tre-
wall>- (.Cornwall.) ) bischlhal).

N. B. Lierrite, axinite, octahedrite, in veins in the slaty
rocks.

„% Network of metalliferous veins in the slaty and un-
stratified rocks, many nearly contemporaneous with the
containing unstratified rocks, others in the slaty
rocks of the age of the greywacke or the secondary
porphyries;—gold, native copper, red copper-ore,
arseniate of iron, platina.—Uppermost limit of uran-
ore and of tantalite.

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Recent Greywacke, glomerate of the Alps, the

CLASS II.-TRANSITION ROCKs.—Continued.

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or Pyrenees, and Scotland).
Transition Red Mountain limestone of England,
Sandstone, Scotland, and the United
States (Picardy, Marquise,

Belgium, Hartz). N. B. Car-
bonate of barytes only here in
- metalliferous veins.
The short beds of anthracite and impure coal,
with vegetable impressions, explain the inti-
mate connexion of this formation and the
Coal Measures.

Pseudo-
volcanic

Rocks.

Near the granite or sienite, masses of Hornfels or Hornrock (Hartz, S.W. Scotland, Brittany), and of Schorliferous Quartz (Hartz).

-: glandular,

Unstratified CRYSTALLINE OR
IGNEOUS ROCKS. .

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dome-like masses, bed-like veins (Scotland), and small *{: (Scotland, Norway, even in limestone containing shells of this latter country).

metalliferous (Zinnwald), dome-like, inbedded, or cylindrical masses, N. B. Uppermost limit of the Topaz.

dome-like or imbedded masses (Scotland), veins and

small veins (Scotland, Norway).
zirconiferous, Norway, Scotland.

Diabase or greenstone.

Hyperstenic sienite or selagite . . . . Kidney-shaped masses.

Sienite, porphyritic

:*::::: or kidney-shaped masses or veins (Scotland, Py> Serpentine, renees, Hartz).

N. B. Greywacke altered where in contact with porphyry, and sometimes imbedded in porphyry (Vorospatak, Lapos Banya in Transylvania); greywacke with bituminous wood and auriferous-pyrites, Vorospatak).

Porphyry, globular,

dome-like or im-
bedded masses,
short beds, bed-
earthy, like veins (Eng-
- land), and veins.
Trap rocks.
amygdaloidal, with epidote, quartz, and
calcareous-spar,
Blatterstein (Rhenane, Westphalia),
augitic.

short beds (Prague), and veins (England).

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masses, or short true Neptunian beds in the slaty Trap-breccia,

short beds united with the porphyry or trap }: and then passing into these (England, Vosges), and sometimes shelly (Vosges). .*. Network of metalliferous veins, in stratified and unstratified rocks; in these last, partly of contemporaneous formation;–red manganese-ore, tellurium.—Last limit of native gold, tin, bismuth, antimony, scheelium, arsenic ores, pharma\- colite, and auriferous-pyrites.

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CLASS HI.—SECONDARY Ok FLCETZ ROCKS.

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"UNSTRATIFIED CRYSTALLINE OR IGNEOUS ROCKS.

-i Porphyry,

/■dome-like masses (Sax-
claystone-porphyry, \ ony), imbedded masses
compact or clink- < or short beds (Scotland,
stone-porpnyry, i Silesia), veins and bed-
Mike veins (Scotland).

Por"~i bed-like veins, and veins
MArran), and imbedded
1 masses(Trebischthal).

Trap, { dome-like masses (Edinburgh,

augitic, the Palatinate).

wacke, imbedded masses.—N. B. Up-
feldspathic,J per limit of the Peridot
earthy, | and Limbilite)
short beds, ^
bed-like veins, > Edinburgh
^and veins, J
semi-vitreous,.. .imbedded masses or short beds (Palatinate of tlit
Rhine).

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N. B. Neptunian
rocks are occasion-
ally altered where

in contact with
porphyry or trap;
for instance, coal
• is reduced to coke
or graphite; sand-
stone is indurated,
and slate-clay (some
times with garnets,
as in Anglesea), in-
durated

Secondary Red Sandstone Deposit or Todtliegendes.
Ex.:Northern Germany, Hall, Tharandt, Bo-
hemia, Forez, Moulins, Bretagne, England,
Southern Alps, Northern Alps, (Tyrol), &c.

Red sandstone (inferior red conglomerate j N. B.

of the Vosges and Black Forest, of the Pseudo-vol~
Thuringerwald): it does not exist on conic Rucks.
the north side of the Pyrenees. New
Red Sandstone of Buckland.
Marly whitish sandstone (Weissliegende);
(Chessy copper sandstone? some geolo-
! gists place '.t among the red marl); Rus-
V. sian copper sandstone;chrome oxide.
The Weissliegende establish in Northern Germany'a transition between the sandstone and the zechstein (Wettin)

2.

Sometimes divided into

QtfT Porphyry-breccia, I fine var. Thonstein, Trap-breccia,

short beds united with the porphyry, or short
true or Neptunian beds in the sand-stone, and then
passing into these or trap masses, and con-
taining sometimes vegetable impressions (Upper

Great deposite of agates, and some few zeolites, as stilbite, and mesotype.

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metalliferous veins, and limit of cobalt-ore, and

small veins; mercury, crystallised gray

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CLASS III-SECONDARY OR FLOETZ ROCKS,-Continued.

STRATIFIED OR NEPTUNIAN ROCKS. II, First Floerz LIMsstone ForMAtion.—Synon. Zechstein, Calcaire alpin; a part of the Hochbirge Kalk of Escher; the Hochgebirge Kalk of

Uttinger.

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Gypsum.
Connected with the red marl by alternations and passages.

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UNSTRATIFIED CRYSTALLINE On
IGNEOUS ROCKS,
Marine Fossils pretty rare.—Amphibious Animals,
Insects, Algacites.—Upper limit of Productus.

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Salt-springs and salt-Salt-springs anJ Salt-springs
, beds (Loiraine). |salt-beds (Castile). | and beds. ,
In all these different countries, the upper sandstones are connected with the following formation of Muschelkalk, excepting in England

in Calabria, Sicily, Persia, and in North and South America.

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