¹ Source: wiktionary.com
Definition of Graywackes
1. graywacke [n] - See also: graywacke
Lexicographical Neighbors of Graywackes
Literary usage of Graywackes
Below you will find example usage of this term as found in modern and/or classical literature:
1. Building Stones and Clays: Their Origin, Characters and Examination by Edwin Clarence Eckel (1912)
"Class B. graywackes and Dense Flagstones.—The stones of this group are often as
dense ... Stones of this group include most of the " graywackes " of Europe, ..."
2. Bulletin by Geological Survey (U.S.) (1916)
"The graywackes contain secondary calcite, both as a constituent of the rock mass
and in the form of veinlets filling fractures. Quartz occurs also as a vein ..."
3. Text-book of Geology by Sir Archibald Geikie (1902)
"The eastern part of the region consists mainly of graywackes and slates which,
with their associated igneous rocks attaining a great thickness in the Wieda ..."
4. Transactions of the American Institute of Mining, Metallurgical and (1915)
"West of Katalla seepages have been found belonging to the same belt, in surface
rocks of more or less metamorphosed graywackes and slates. ..."
5. Mineral Resources of Alaska: Report on Progress of Investigations in 1915 by Alfred H. Brooks (1916)
"The argillites and slates of this group of sediments consist of the finer clastic
materials driven from the same source as that which yielded the graywackes ..."
6. 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)
"In the schistose graywackes the flakes of chlorite and sericite are in ...
With decrease in the content of feldspar the graywackes grade into arkose and ..."
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