List: Geological rock types

Clue: A sedimentary rock composed primarily of coccolith fossils(A rock type - Geology)
Answer: Chalk
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Clue: A rare type of granite containing pyroxene(A rock type - Geology)
Answer: Charnockite
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Comments: Statistics: 205 Images: 0

Clue: A fine grained chemical sedimentary rock composed of silica(A rock type - Geology)
Answer: Chert
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Comments: Statistics: 240 Images: 0

Clue: A sedimentary rock formed from clay(A rock type - Geology)
Answer: Claystone
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Comments: Statistics: 67 Images: 0

Clue: A sedimentary rock formed from organic matter(A rock type - Geology)
Answer: Coal
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Comments: Statistics: 60 Images: 0

Clue: A sedimentary rock composed of large rounded fragments of other rocks(A rock type - Geology)
Answer: Conglomerate
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Comments: Statistics: 63 Images: 0

Clue: A poorly sorted conglomerate(A rock type - Geology)
Answer: Diamictite
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Comments: Statistics: 65 Images: 0

Clue: A sedimentary carbonate rock formed by accumulation of abundant shell fossils and fragments(A rock type - Geology)
Answer: Coquina
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Clue: A felsic to intermediate volcanic rock with high iron content(A rock type - Geology)
Answer: Dacite
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Comments: Statistics: 74 Images: 0

Clue: A coarse grained intermediate plutonic rock composed of plagioclase, pyroxene and/or amphibole(A rock type - Geology)
Answer: Diorite
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Comments: Statistics: 76 Images: 0

Clue: An ultramafic cumulate rock composed of olivine and accessories(A rock type - Geology)
Answer: Dunite
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Clue: An ultra-high grade metamorphosed basalt or gabbro; also a facies of metamorphic rocks(A rock type - Geology)
Answer: Eclogite
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Comments: Statistics: 80 Images: 0