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ตารางที่ 4.2 ตารางการจำแนกหินตะกอน (Dearman, 1991)

CHEMICAL/
DETRITAL SEDIMENTARY GENETIC GROUP
ORGANIC

Bedded Usual structure

Salts,
Grains of rock, quartz, At least 50% of grains Carbonates, Composition
feldspar and clay minerals are of carbonate Silica
Carboneceous
Grains are of Very
rock fragment Saline rock: coarse-
Rudaceous Rounded grains: Calcirudite Halite grained 60

conglomerate
Anhydrite
Gypsum Coarse-

Angular grains: breccia grained 2
Grains are mainly
Arenaceous mineral fragments Calarenite Medium-

grained
Sandstone: grain are
mainly mineral fragments
Siltstone: Limestone (undifferntiated) Calcreous rocks: Fine- 0.006 Predominant grain size (mm)
Limestone

50% fine
Dolomite
Agilliceous or Lutaceous Mudstone grained Marlstone Calcisiltite Siliceous rocks: grained 0.002

particles
Shale:
Claystone:
Chalk

Fissile

50% very

mudstone
Very fine-
Calcilutite
fine-fine
grained
Flint
particles Chert grained
Carbonaceous
rock:
Lignite Glassy
Amorphous
Coal