Εικόνες σελίδας
PDF
Ηλεκτρ. έκδοση

STRATIFIED OR NEPTUNIAN ROCKS.

CLASS II.-TRANSITION ROCKS.

FORMATION OF TALCOSE AND QUARTZOSE ROCKS, AND OF CLAY-SLATE.-
Ex.: Alps, Pyrenees, Ardennes, Brittany, Bohemia, Scotland, &c.

[blocks in formation]

Fossils very scarce.
Zoophyta, Orthocera-
tites, Crustaceæ, Tri-
lobites (Brittany, La
Manche, Alps), Mo-
nocotyledonous vege-
tables.

Short beds of rocks
impregnated with
hornblende, actino-
lite-slate.

UNSTRATIFIED CRYSTALLINE OR IGNEOUS ROCKS.

Granite-porphyritic dome-like masses, bed-rarely with
and sometimes like veins, veins, and tertiary basalt
cellular,
small veins (Erzge.) 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, England, Germany), and veins (Scot).
Diallage rock or Euphotide,-dome-like or imbedded masses
(Appennines).
Serpentine,-dome-like or
imbedded masses, and
bed-like veins,

Iron-glance-slate (Bra- Augite rock,-dome-like or

zil and Bavaria).
Granitic rock, with
iron-glance (Scot-
land, Vicentin).
Mica-slate, mixed with
serpentine (Alps).
Potstone.

cylindrical masses, and
veins (Pyren. Piedmont,

Elvan, Corn-
Porphyries (Syn
wall).

many minerals imbedded, as
hornblende, augite, chromate of
iron, and chrysoprase.

N. B. A breccia composed of gra
nular limestone and augite accom

panies this rock (Port de L'herz).
bed-like veins, and veins N. B. Sometimes
of the age of recent grey-slate altered at
wacke (Vendée, Erzgeb.the contact (Tre-
(Cornwall.)
bischthal).

N. B. Lievrite, 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.

[graphic]
[graphic]

UNSTRATIFIED CRYSTALLINE OR

IGNEOUS ROCKS.

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

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

{dome-like or imbedded masses (Scotland), veins and porphyriticsmall veins (Scotland, Norway).

[blocks in formation]

CLASS II.-TRANSITION ROCKS.—Continued.

Terrestrial Monocotyledonous vegetables.

Granite,

Sienite,

Near the granite or sienite, masses of Hornfels or Horn

nate or

short

beds of

sparry iron

Limestone,

compact, with

ore (Styria),

small spar-.

in part con

ry veins

verted

into

(Hartz).

[blocks in formation]

Dolomite,. . . compact, with Encrinites.

[blocks in formation]

rock (Hartz,

zirconiferous, Norway, Scotland.

Diabase or greenstone.

Hyperstenic sienite or selagite

Brittany), and Variolite, S.W. Scotland, Euphotide, of Schorliferous Serpentine, Quartz (Hartz).

Porphyry,

Kidney-shaped masses.

dome-like or kidney-shaped masses or veins (Scotland, Py-
renees, Hartz).

[blocks in formation]
[blocks in formation]

amygdaloidal, with epidote, quartz, and short beds (Prague), and Blatterstein (Rhenane, Westphalia), Sveins (England). augitic.

Porphyry-breccia, Trap-breccia,

short beds united with the porphyry or trap
masses, or short true Neptunian beds in the slaty
rocks, 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 forma-
tion;-red manganese-ore, tellurium.-Last limit of native
gold, tin, bismuth, antimony, scheelium, arsenic ores, pharma-
colite, and auriferous-pyrites.

[blocks in formation]
[blocks in formation]

(Bohemia).

Compact limestone, fetid (W. borders of Rhine). It is the only deposit which contains the true slate and pitch caking coal in great abundance.

[blocks in formation]

Red sandstone (inferior red conglomerate of the Vosges and Black Forest, of the Thuringerwald): it does not exist on the north side of the Pyrenees. New Red Sandstone of Buckland. Marly whitish sandstone (Weissliegende); (Chessy copper sandstone? some geologists placet among the red marl); Russian copper sandstone; chrome oxide.

with the arena-
ceous Neptu-
nian deposits
during this

Fishes were in abundance during this period.

whole period.

Pseudo-volcanic Rocks.

pitchstone-porphy

(Arran), and imbedded masses(Trebischthal).

(dome-like masses (Edinburgh,
the Palatinate).

imbedded masses.-N. B. Up-
per limit of the Peridot
and Limbilite)

short beds,

bed-like veins, Edinburgh

and veins,

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

semi-vitreous,...imbedded masses or short beds (Palatinate of the Rhine).

Porphyry-breccia, 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
Saxony).

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

Network of metalliferous veins, and small veins; mercury, &c.-Last limit of cobalt-ore, and crystallised gray man

[graphic]

ganese-ore.

The Weissliegende establish in Northern Germany a transition between the sandstone and the zechstein (Wettin).

[graphic]

CLASS III.-SECONDARY OR FLETZ ROCKS,-Continued.
STRATIFIED OR NEPTUNIAN ROCKS.

II. FIRST FLETZ LIMESTONE FORMATION.-Synon. Zechstein, Calcaire alpin;
a part of the Hochbirge Kalk of Escher; the Hochgebirge Kalk of
Uttinger.

[blocks in formation]

UNSTRATIFIED CRYSTALLINE OR
IGNEOUS ROCKS.

[blocks in formation]

Cellular or earthy
limestone? with
sulphur & petro-
leum (St. Boess).

earthy.

breccia-like.

Gypsum.

Germans.

Connected with the red marl by alternations and passages.

NORTHERN
ALPS.

Magnesian lime- Compact Zechstein,

stone more or

less & without

small granular

SOUTHERN
ALPS.

without shells,
(Recoȧro).

petrifactions. Calcareous blackish

marls (Vicentin).

compact & crack-Limestone or Dolo

ed.

metalliferous.

compact and cracked (Idria).

nite.

[blocks in formation]

Existing, perhaps,
in North and
South America.
Connected by alter-
nations with the
variegated sand-
stone (Recoaro).

[blocks in formation]

VOL. X.

H

III. SECOND FLETZ SANDSTONE FORMATION, OR VARIEGATED OR SALIFEROUS
SANDSTONE.-Syn. Greshouiller, Beud., and of Boué's Mem. sur l'Allemagne ;
Grauwacke of Alps of many geologists; Old Molasse in part, in vicinity of Alps.

[blocks in formation]

Terrestrial monocotyledons and dicotyledons, many marine plants. Mollusca, or Zoophyte only in the upper part (Wieliczka, Soultz in Alsace).

[blocks in formation]
[blocks in formation]

N. B. Sandstone cracked, vitrified, or with its color changed at the contact with

[graphic]

Salt-springs Salt-springs, salt disseminatbeds (Lorraine). salt-beds (Castile). and beds. ed, and in beds (Bex). In all these different countries, the upper sandstones are connected with the following formation of Muschelkalk, excepting in England. This formation occurs in Calabria, Sicily, Persia, and in North and South America.

« ΠροηγούμενηΣυνέχεια »