Terms to know before doing the Sedimentary Rock Lab

Wentworth Scale for grain size

know mm size limits for gravel, sand, silt, and clay

Clastic (or detrital or terrigenous) sediment vs. Chemical (or biochemical sediment)

Major cements and their properties (how to recognize them)

calcite
hematite
silica

General familiarity with the basic sedimentary rock types:

Conglomerate vs. breccia
Siltstone
Shale
Sandstones (and the dominant type of grain in each type):

Arkose (feldspar)
Graywacke or lithic sandstone or litharenite (rock fragments)
Quartz sandstone (quartz)

Limestones:
Chalk
Coquina
Oolitic limestone
Travertine
Dolostone (dolomite)
Coals:

Peat
Lignite
Bituminous
Anthracite

Chert
Evaporites:

Rock salt
Rock gypsum

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Page was last updated on Monday February 16, 1998 at 3:00:42 pm.