wackeniticadj.
/ˌwakəˈnɪtɪk/, U.S. /ˌwækəˈnɪdɪk/ Geology. Now rare.
Having the nature or composition of wacke (wacke n.).
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the world > the earth > structure of the earth > constituent materials > rock > igneous rock > [adjective] > wacke
wackenitic1866
1866 P. H. Lawrence tr. B. von Cotta Rocks Classified i. iii. 96 We shall use the adjective ‘wackenitic’ to designate this [decomposed] state of those rocks.
1887 M. E. Wadsworth Prelim. Descr. Peridotytes, Gabbros, Diabases & Andesytes of Minnesota 39 The specimens are usually decomposed to some extent, often wackenitic, sometimes porphyritic, schistose or foliated.
1902 Proc. Royal Soc. Victoria 15 37 A decomposed wackenitic clay was met with, which gave place to the ordinary basalt of the district at a greater depth.
This entry has been updated (OED Third Edition, September 2013; most recently modified version published online December 2021).
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adj.1866