Var. e. Orthoclase.
f. Pistacite.
g. Pycnite.
h. Lepidolite.
i. Lievrite.
j. Magnetite.
k. Anthracite.
1. Graphite.
m. Eisenkiesel.

n. Garnet-rock.

Group N.-SLATE. [See Order II., Class I., Group A, Subgroup B, Variety d.]

Group O.-CALCAREOUS ROCKS.

Subgroup A. Schistose limestone.

Var. a. Cipollino.

b. Calciphyre.

c. Hemitrene.
d. Felsitic limestone.
e. Statuary marble.

f. Granular schistose limestone.

Group P.-PSEUDOMORPH CALCAREOUS ROCKS.

Subgroup A. Schistose dolomyte.

Var. a. Micaceous dolomyte.

Order No. II.-DERIVATE ROCKS.

(Divided into Classes, Groups, Subgroups, Varieties, and Subvarieties.)

Class I.-SUBAQUEOUS ROCKS.

Group A.-ROCKS FOR THE MOST PART MECHANICALLY FORMED. Subgroup A. Arenaceous rocks.

Var. a. Sand, gravel, and shingle.

b. Conglomerate.

Subvar. a. Calcareous.

Subvar. a. Calcareous.

b. Hematitic.

c. Cupriferous.

d. Pyritous.

e. Shale breccia.

d. Sandstone and grit.

Subvar. a. Calcareous.

b. Argillous.

c. Felspathic.
d. Micaceous.
e. Hematitic.

f. Cupriferous.
g. Pyritous.
h. Tuffose.
i. Pebbly.
j. Cleaved.
k. Oblique.
1. Concretionary.
m. Spheroidal.
n. Nodular.

o. Lenticular.

p. Friable.

Subgroup B. Argillous or Argillaceous rocks.
Var. a. Clay, loam, mud, and silt.

Group B.-ROCKS FOR THE MOST PART CHEMICALLY FORMED.

I. Minerals occurring as rocks (see page 17).
Var. a. Asphalte.

b. Pyrite.

c. Cinnabar.

d. Boracite.
e. Trona.

f. Aragonite.
g. Manganese ores.
h. Rhodochrosite.
i. Bole.

j. Opal.

k. Fluorite.

1. Barite.
m. Ankerite.
n. Malachite.
o. Melanite.
p. Galmey.
q. Zincite.

r. Galenite.
s. Stibnite.

t. Arsenopyrite.

u. Sulphur.
v. Wavellite.
w. Chalcopyrite.