As a noun wacke
is (geology) a soft, earthy, dark-coloured rock or clay derived from the alteration of basalt.
As a verb walke is
.
wacke
English
Noun
(geology) A soft, earthy, dark-coloured rock or clay derived from the alteration of basalt.
Synonyms
* wacky
Related terms
* graywacke, greywacke
References
walke
English
Verb
(head)