wacke


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Related to wacke: Arenite, lithic sandstone

wacke

(ˈwækə)
n
(Geological Science) obsolete any of various soft earthy rocks that resemble or are derived from basaltic rocks
[C18: from German: rock, gravel, basalt]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
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References in periodicals archive ?
The test work results showed that of the combined mass of the size fractions of + 10mm and + 4mm to minus 10mm from a composite of all ten samples subjected to the test work, an average of 45% of the sample mass was rejected as barren or insignificantly mineralised Quartz Wacke (the host rock of mineralisation), leaving 55% of mineralised Quartz Wacke available for milling and processing.
La CIDI 2.1 presenta una alta fiabilidad intervaluadores (Wittchen et al., 1991), test-retest (Wacke et al., 2006), asi como elevada consistencia interna (Wittchen, 1994).
The south side of the harbour Dieffenbach considered to consist of "much fissured wacke and basalt".
Croix belt is a highly deformed Cambrian-Ordovician (Tremadocian to Sandbian) sequence of shale, wacke, and quartzose sandstone; the Fredericton belt is a thick Silurian (Llandoverian to Ludlovian) sequence of wacke, shale, and calcareous sandstone (Ruitenberg 1967; Fyffe and Riva 2001; Castonguay et al.
Quartz Wacke Facies (MF1): This facies is 4.11m thick in the field.