Classificatlou of Sedimentary Rocks. — Grakau. 24S 
EXOGENETIC OR CLASTIC ROCKS. 
ARENACEOUS. || 
LCTACEOUS. 
Consolidated 
(arenytes.) 
Metamorphlc 
Unconsolidated 
Consolidated, 
(lutytes.) 
Metamorphic. 
Volcanic arenytes or 
coarse tuffs (Pyraren- 
ytes.) 
Hornblende 
schists, etc. 
Volcanic ashes and 
mud. 
Volcanic ashtuffs. 
(Pyrolutytcs.) 
Hornblende, 
schist, etc. 
Unstratified sand- 
stones, greywackes, 
etc. (Usually impure 
autoarenytes, but 
sometimes pure auto- 
silicarenytes or auto- 
oalcarenytes.) 
Various schists, 
etc. 
(quartzytes, 
marbles) 
Rock flour, gla- 
cial till and unas- 
soriea glacial clays 
with few or no 
boulders or sand. 
Greywack slates, etc. 
(Autolutytes, impure 
auto-argillutytes, etc.) 
Quartzytes, etc. 
Argillytes, Phyl 
lytes, mica- 
schist, etc. 
Arkoses or Feldspar 
arenytes. (Atmoaren- 
ytes, sometimes pure 
AtmoEilicarenytes or 
Atmocalcarenytes.) 
Paragnelsses. 
eic. 
(Quartzytes. 
marbles) 
Lateryte. and all 
clays formed in 
situ. 
Argillutytes, often 
Siliceous or ferruginous 
( Atmoargillutytes. ) 
Slates, argillytes 
and schist of 
varying type. 
1 Aeolian quartz sand- 
stone(Anemosilicaren- 
yte) 
2 Aeolian limestone 
(Anemocalcarenyte) 
1. Quartzytes, 
schists, etc. 
2. Marbles. 
3. Loess, dust de- 
posits, (generally 
quite impure clays). 
3 Impure clay rocks 
(Siliceous or calcareous 
anemoargillutytes.) 
3. Argillytes, 
schists of vary- 
ing type, etc. 
a Waterlaid quartz 
sandstone. 
(Hydrosilicaienytes.) 
b. Micaceous feldspath- 
ic, glauconitic. etc. 
silicarenytes. 
(Impure Hydrosilica- 
renytes.) 
C. Glauconarenytes. 
a. Quartzytes. 
b. Mica quartz- 
ytes, mica 
schists, etc. 
a. Quartz muds, 
(off-shore oozes). 
b. Argillaceous 
or calcareous quartz 
mud. 
a. Comparct quartz 
mud rocks. Novaculyte. 
or whet-stones. (Hy- 
drosiiicilutytes.) 
b. Argillaceous or cal- 
careous silicilutytes. 
(Impure Hydrosilicilu- 
tytes.) 
a. Quartz rock. 
b. Slates, schist 
hornfels, etc., et 
a Water laid calc- 
arcnyte. 
(Hydrocalcarenyte.) 
b. Siliceous, argilla- 
ceous or ferruginous 
calcarenytes (Impure 
Hydrocalcareny tes. ) 
a. Dolomytes and 
numerous alter- 
ation products, 
marores, etc. 
b. Garnet rock. 
Calchornfels, mi 
caceus marbles. 
etc. 
a. Calc mud. 
b. Siliceous, argil- 
laceous, or car- 
bonaceous calc 
mud. 
b. Waterlaid calcilu- 
tyte. 
(Hvdrocalcilutyte) 
b. Siliceous, argillace- 
ous, or carbonaceous 
calcilutytes. 
(Impure Hydrocalcilu- 
tytes.) 
a. As under cal- 
carenytes. 
b. As under cal 
carenytes. 
ExampUs 
Examples 
' 
a. Water-laid clays 
1 or Kaolins. 
b. Impure water- 
laid clays, — sil- 
iceous, calcare- 
ous, carbonaceous. 
etc. 
a. Shales, clay rock of 
various types — i. e. 
pure argillutytes (Hy- 
drargillutytos.) 
b. Shales. Siliceous, 
calcareous or carbona- 
ceous argillutytes. (Im- 
pure HydrargilUitytes.) 
a. Slates, argill- 
vtes. Porcelan- 
ytes, etc. 
b Shales, phyl 
Ivtes, various 
schist, pyro- 
schist. etc. 
Siliceous Arenytes 
(Siliceous Hydraien- 
ytes.) 
Schists, para- 
gneisses, etc. 
Water-l3id rock- 
flour — chielly 
1 ground up sili- 
! cates. 
Siliceous lutytes. (Sili- 
cious Hydrolutytes.) 
Schist, etc. 
(Bioarenytes.) 
Pulverized rock 
prepared brick 
1 clay. etc. 
Cement, plaster,sun- 
dried bricks, etc. (Blo- 
lutytes.) 
Burnt brick, et 
(as material.) 
