Foliation Definition

Foliation Sentence Examples

• The development of foliation in shaly rocks is undoubtedly closely akin to the production of cleavage in slates.

• The foliation is often parallel to the bedding, but may cross it obliquely or at right angles; or the bedding may be folded and contorted while the foliation maintains a nearly uniform orientation.

• The difference between schists and gneisses is mainly that the latter have less highly developed foliation; they also, as a rule, are more coarse grained, and contain far more quartz and felspar, two minerals which rarely assume platy or acicular forms, and hence do not lead to the production of a fissile character in the rocks in which they are important constituents.

• The varying texture of this rock, its irregular foliation and jointing, and its ramifying veins of pegmatite give it very unequal powers of resistance.

• Calc-schists are usually argillaceous limestones in which a large development of biotite or phlogopite has occasioned foliation.