cryptovolcanic
/ˌkrɪptə(ʊ)vɒlˈkanɪk/Geology
adjective
Of a phenomenon or structure (especially a crater): apparently volcanic but occurring or formed in the absence of evident volcanic activity.
- Many structures formerly so described have been shown to result from meteorite impact..
Origin
Early 20th century; earliest use found in Nature: a weekly journal of science. From crypto- + volcanic, after German kryptovulkanisch.