[{"Bold_text": "noun", "List Items": ["Geology.a cropping out, as of a stratum or vein at the surface of the earth.the exposed portion of such a stratum or vein.", "a cropping out, as of a stratum or vein at the surface of the earth.", "the exposed portion of such a stratum or vein.", "something that emerges suddenly or violently in the manner of an outcrop; outbreak:an outcrop of student demonstrations."]}, {"Bold_text": "verb (used without object)", "List Items": ["to crop out, as strata."]}]