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Subvar. h. Flaggy.

i. Conglomeritic.
j. Nodular.
k. Concretionary.

1. Spheroidal.
m. Lenticular.
n. Mudstone.

0. Tutenic shale.
Var. d. Slate.
Subvar. a. Roofing slate.

b. Slab slate.
c. Pencil slate.
d. Novaculyte.
e. Calcareous slate.
f. Carbonaceous.
g. Arenaceous.
h. Tuffose.
i. Ribaned.

j. Conglomeritic.
Subgroup C. Fault rock.
Group B.-ROCKS FOR THE MOST PART CHEMICALLY FORMED.
Subgroup A. Halyte.

Var. a. Granular.

b. Sparry.

c. Fibrous.
B. Gypsum.
Var. a. Alabaster.

b. Granular gypsum,
C. Compact.
d. Fibrous.
e. Selenyte.

f. Tripe-stone.
C. Anhydryte.
Var. a. Granular.

b. Compact.

c. Fibrous.
D. Dolomyte.
E. Quartz
Var. a. Chert.

b. Flint.
c. Menilyte.
d. Jasper.

Var. e. Agate.

f. Basanyte. Subgroup F. Limonite rock.

Var. a. Limonite shale.

b. Dolitic brown ore.
c. Reniform iron ore.
d. Pea-iron ore.
e. Bog-iron ore.
Subvar. a. Black.

b. Yellow.

c. Sparry.
G. Hematite rock.
Var. a. Red iron-mould.

6. Reddle.
c. Sparry red-ironstone.
d. Specular iron.

e. Topanhoacanga.
H. Spherosideryte.

Var. a. Black band.
1. Minerals occurring as rocks (see page 17).
Var. a. Asphalte.

b. Pyrite.
C. Cinnabar.
d. Boracite.
e. Trona.
f. Aragonite.
g. Manganese ores.
ħ. Rhodochrosite.
i. Bole.
3. Opal.
K. Fluorite.
1. Barite.
m. Ankerite.
n. Malachite.
0. Melanite.
p. Galmey.
9. Zincite.
7. Galenite.
S. Stibnite.
t. Arsenopyrite.
U. Sulphur.
v. Wavellite.
w. Chalcopyrite.

Group C.--ROCKS PARTLY MECHANICALLY, PARTLY CHEMICALLY,

AND PARTLY ORGANICALLY FORMED.
Subgroup A. Laminated, or stratified coal.

Var. a. Cannel coal.
Subvar. a. Parrot coal.

b. Horn coal.

c. Torbanyte.
b. Splint coal.
C. Culm.
d. Bituminous shale.
e. Carbonaceous shale.
Subvar. a. Batt, or bass.

b. Dauks.
C. Kelve.
d. Pindy.

e. Slaty culm.
B. Limestone.
Var. a. Compact limestone.

b. Crystalline limestone.
C. Marble.
d. Oolyte.
Subvar. a. Pisolyte.

b. Dolomitic oolyte.
e. Chalk.
Subvar. a. Indurated chalk.

b. Chalk rock.
c. Pisolitic chalk
d. Glauconitic chalk.

e. Ferruginous chalk.
f. Calcsinter.
Subvar. a. Travertine.

b. Stalactyte.
c. Stalagmyte.

d. Rockmeal.
g. Coral-reef limestone.
h. Brecciated limestone.
i. Limestone conglomerate.
j. Rubbly limestone.
k. Lithographyte.
1. Siliceous limestone.
m. Cherty.
n. Argillous.
0. Arenaceous.

Var. p. Ferruginous.

9. Bituminous.
r. Stinkstone.
s. Dolomitic limestone.

t. Hydraulic limestone. Subgroup C. Dolomyte.

Var. a. Granular.

b. Oolitic.
C. Compact.
d. Porous.
e. Cellular.
f. Concretionary.
g. Brecciated.
h. Rubbly.
2. Ferruginous.
3. Argillous.
k. Arenaceous.
1. Siliceous.
m. Cherty.
n. Tuffose.

0. Dolomitic sand.
D. Marine drift.
(See Class II., Subgroup B, Var. c.)

Class II.-SUBAERIAL ROCKS.

FORMED.

Group D.-MECHANICALLY, CHEMICALLY, OR ORGANICALLY
Subgroup A. Coal.

Var. a. Peat.
Subvar. a. White turf.

b. Brown turf.
c. Black or Stone turf.

d. Gas turf.
b. Lignyte or Brown coal.
Subvar. a. Woody lignyte.

b. Compact lignyte.

c. Jet.
c. Black coal or Steinkohle.

Subvar. a. Caking coal.

b. Non-caking coal.

c. Cherry coal. Var. d. Anthracyte.

Subvar. a. Native coke. Subgroup B. Surface deposits and accumulations.

Var. a. Boulder-clay-drift.

Subvar. a. Calcareous.

b. Argillous.

C. Arenaceous.
b. Moraine drift.
Subvar. a. Calcareous.

b. Argillous.
C. Arenaceous.

d. Rocky.
c. Sand, gravel, and shingle.
Subvar. a. Esker drift.

b. Post-drift gravel.
C. Beaches.
d. Æolian drift.
e. Shell sand.

f. Bergmehl.
d. Guano.
e. Soil.
f. Meteoric drift.
g. Ice.

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