peridotiticadj.
/ˌpɛrᵻdəˈtɪtɪk/, U.S. /pəˌrɪdəˈtɪdɪk/ Geology.
Containing, consisting of, or resembling peridotite.
ΘΚΠ
the world > the earth > structure of the earth > constituent materials > rock > igneous rock > [adjective] > plutonic > other plutonics
peridotitic1886
tonalitic1963
1886 J. J. H. Teall Brit. Petrogr. iv. 68 Peridotitic, hornblendic, and augitic rocks have been serpentinised.
1935 E. B. Branson & W. A. Tarr Introd. Geol. iii. 13 Magmas occurring to depths of 10 miles are of one type, those that are 10 to 40 miles..down are of another type, and those in the layer..next below the crust are of still another. These three regions of the earth's body are known as the granitic, gabbroid or basaltic, and peridotitic zones.
1974 Mineral. Mag. 39 798 Peridotitic rocks in the Massif du Sud..have suffered about 30% serpentinization.
1994 Sci. Amer. Mar. 28/2 Hot, peridotitic material rises under the midocean ridges from depths exceeding 100 kilometres below the seafloor.
This entry has been updated (OED Third Edition, December 2005; most recently modified version published online March 2022).
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adj.1886