different between shale vs hornfels

English

Etymology

From Middle English schale (“shell, husk; scale”), from Old English s?ealu (“shell, husk, pod”), from Proto-Germanic *skal? (compare West Frisian skaal (“dish”), Dutch schaal (“shell”), schalie (“shale”), German Schale (“husk, pod”)), from Proto-Indo-European *(s)kelH- (“to split, cut”) (compare Lithuanian skalà (“splinter”), Old Church Slavonic ????? (skala, “rock, stone”), Polish ska?a (“rock”), Albanian halë (“fish bone, splinter”), Sanskrit ?? (kalá, “small part”)), from to split, cleave (compare Hittite [script needed] (iškalla, “to tear apart, slit open”), Lithuanian skélti (“to split”), Ancient Greek ?????? (skáll?, “to hoe, harrow”)). Doublet of scale. See also shell.

Pronunciation

• IPA^(key): /?e?l/
• Rhymes: -e?l

Noun

shale (countable and uncountable, plural shales)

1. A shell or husk; a cod or pod.
   • c. 1610s, George Chapman, Batrachomyomachia

     the green shales of a bean

2. (geology) A fine-grained sedimentary rock of a thin, laminated, and often friable, structure.

Usage notes

Before the mid 19th century, the terms shale, slate and schist were not sharply distinguished. Shales that are subject to heat and pressure alter into slate, then schist and finally to gneiss.

Derived terms

• oil shale
• shale oil
• shaley
• shaleionaire
• shaly

Related terms

• gneiss
• schist
• slate

Translations

Verb

shale (third-person singular simple present shales, present participle shaling, simple past and past participle shaled)

1. To take off the shell or coat of.

Synonyms

• shell

Translations

Anagrams

• Hales, Heals, Sahel, Saleh, Selah, hales, halse, heals, leash, selah, sheal

Chickasaw

Noun

shale

1. bus

English

Etymology

Borrowed from German Hornfels, literally "horn stone", after its frequent association with glacial "horn peaks" in the Alps.

Noun

hornfels (countable and uncountable, plural hornfelses or hornfels)

1. Any of a series of contact metamorphic rocks that have been baked and indurated by the heat of intrusive igneous masses and rendered massive, hard, splintery, and in some cases exceedingly tough and durable.