Petrogenesis
[pe-troh-jen-uh-sis] /ˌpɛ troʊˈdʒɛn ə sɪs/
noun
1.
the branch of petrology dealing with the origin and formation of rocks.
2.
the origin and formation of rocks.
petrogenesis
(pět’rō-jěn’ĭ-sĭs)
The branch of petrology that deals with the origin and formation of rocks, especially igneous rocks.
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[pe-truh-glif] /ˈpɛ trəˌglɪf/ noun 1. a drawing or carving on rock, made by a member of a prehistoric people. /ˈpɛtrəˌɡlɪf/ noun 1. a drawing or carving on rock, esp a prehistoric one n. 1870, from French pétroglyphe, from Greek petra “rock” (see petrous) + glyphe “carving” (see glyph).
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petrography
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[pe-truh-grad; Russian pyi-truh-graht] /ˈpɛ trəˌgræd; Russian pyɪ trʌˈgrɑt/ noun 1. former name (1914–24) of (def 2). /ˈpɛtrəʊˌɡræd; Russian pɪtraˈɡrat/ noun 1. a former name (1914–24) of Saint Petersburg
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[pe-truh-gram] /ˈpɛ trəˌgræm/ noun 1. a drawing or painting on rock, especially one made by a member of a prehistoric people.
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[pe-truh-graf, -grahf] /ˈpɛ trəˌgræf, -ˌgrɑf/ noun 1. . noun a rock inscription or painting