Alum shale

Webster's Dictionary of the English Language

·- A variety of shale or clay slate, containing iron pyrites, the decomposition of which leads to the formation of alum, which often effloresces on the rock.

Webster's Dictionary of the English Language

← Alum schist × Alum stone →

Related Words

Shale
·noun A shell or husk; a cod or pod. II. Shale ·vt To take off the shell or coat of; to <<Shell>>. ...

Webster's Dictionary of the English Language
shale
to peel ; perhaps to shell. Also to slide down, as the side of a bank. N. ...

A glossary of provincial and local words used in England by Francis Grose
alum
alum (hal-), n., or alus, i, f., a plant. I Comfrey : Symphytum officinale, Linn.; Plin. 27, 6, ...

A New Latin Dictionary by Charlton T. Lewis Ph.D. and Charles Short, LL. D.
Alum
·vt To steep in, or otherwise impregnate with, a solution of alum; to treat with alum. II. Alum ·no...

Webster's Dictionary of the English Language
Alum root
·- A North American herb (Heuchera Americana) of the Saxifrage family, whose root has astringent pro...

Webster's Dictionary of the English Language
Alum schist
·- ·Alt. of Alum shale. ...

Webster's Dictionary of the English Language
Alum stone
·- A subsulphate of alumina and potash; alunite. ...

Webster's Dictionary of the English Language
Roche alum
·- A kind of alum occuring in small fragments; — so called from Rocca, in Syria, whence alum is sai...

Webster's Dictionary of the English Language