Lexic.us

Definition of Graywacke

1. n. A conglomerate or grit rock, consisting of rounded pebbles and sand firmly united together.

Definition of Graywacke

1. Noun. (alternative form of greywacke) ¹

¹ Source: wiktionary.com

Definition of Graywacke

1. [n -S]

Medical Definition of Graywacke

1. A conglomerate or grit rock, consisting of rounded pebbles sand firmly united together. This term, derved from the grauwacke of German miners, was formerly applied in geology to different grits and slates of the Silurian series; but it is now seldom used. Origin: G. Grauwacke; grau gray + wacke wacke. See Gray, and Wacke, and cf. Grauwacke. Source: Websters Dictionary (01 Mar 1998)

Lexicographical Neighbors of Graywacke

Literary usage of Graywacke

Below you will find example usage of this term as found in modern and/or classical literature:

1. Report on the Geology, Mineralogy, Botany, and Zoology of Massachusetts by Massachusetts Geological survey, Edward Hitchcock (1835)
"I have already stated the reasons that induce me to believe the indurated compact limestone of Newport to belong to the graywacke formation : and I have ..."

2. Mineral Physiology and Physiography: A Second Series of Chemical and by Thomas Sterry Hunt (1891)
"1 ) was described as an argillite or graywacke-slate, ... This Secondary graywacke is thus clearly indentified with the strata subsequently called the Utica ..."

3. Transactions of the American Institute of Mining, Metallurgical and (1918)
"... -graywacke Formation* The quartzite-graywacke formation shown on the map, Fig. 2, is the oldest of the three formations present in the vicinity of the ..."

4. Contributions to the Pre-Cambrian Geology of Northern Michigan and Wisconsin by Rolland Craten Allen, L. P. Barrett, Ermine Cowles Case, W. I. Robinson (1915)
"The base of the Middle Huronian series is highly metamorphosed quartzite and graywacke. The quartzite is exposed in a large outcrop in the NWJ of SEJ of ..."

5. Annual Report by New Jersey State Geologist, New Jersey Geological Survey (1884)
"northwest side, are composed of graywacke and graywacke slate, standing nearly ... While it passes, on one hand, into graywacke slate or graywacke shale, ..."

6. Bulletin by Natural History Society of New Brunswick (1897)
"the whole of these rocks belonged to the graywacke group, the- upper only bore a close resemblance to the Silurian rocks of Europe. ..."

7. The New Statistical Account of Scotland by Society for the Benefit of the Sons and Daughters of the Clergy (1845)
"Boyndie bay, a bed of clay-slate is found reposing on graywacke ; the latter, ... The clay-slate is found resting on the graywacke in a conformable position ..."

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