petrographic period

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petrographic period [¦pe·trə¦graf·ik ′pir·ē·əd]

(geology)

The extension in time of a rock association.

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No references found			Petrochemistry Petrodvorets petrofabric petrofabric analysis petrofabric diagram petrofabrics petrofacies petrogenesis petrogenic grid petrogeny petrogeometry Petroglyph Petroglyph Beach State Historic Site Petroglyph National Monument Petrograd Petrograd Bureau of the Central Committee of the Russian Communist Petrograd Defense of 1919 Petrograd Military Revolutionary Committee Petrograd Soviet of Workers and Soldiers Deputies Petrograd standard Petrograd Telegraph Agency PTA petrographer petrographic analysis petrographic facies petrographic microscope petrographic period Petrographic Province Petrography Petrohanski Prohod Petrokov Petrokrepost petrol Petrolatum Petróleos de Venezuela, SA petroleum petroleum asphalt petroleum benzin Petroleum By-Product Gases petroleum chemicals petroleum coke Petroleum County petroleum engineer petroleum engineering Petroleum Ether Petroleum Fractionation petroleum geology petroleum hydrocarbon Petroleum Industry petroleum isomerization process petroleum microbiology Petroleum Monopolies of the Capitalist Countries			petrogeometry petroglyph petroglyph Petroglyph Beach State Historic Site Petroglyph National Monument Petroglyph National Monument petroglyphic petroglyphic Petroglyphs Petroglyphs Petroglyphy Petrograd Petrograd Petrograd Bureau of the Central Committee of the Russian Communist Petrograd Defense of 1919 Petrograd Military Revolutionary Committee Petrograd Soviet of Workers and Soldiers Deputies Petrograd Standard Petrograd Telegraph Agency Petrograd Telegraph Agency PTA petrographer petrographer petrographers petrographers petrographic petrographic petrographic analysis petrographic facies Petrographic microscope Petrographic microscope petrographic period petrographic province petrographical petrographical petrographically petrographically petrography petrography Petrohanski Prohod Petrohawk Energy Corporation Petroholic Petroholic Petroholic Petrohyoid Petroica macrocephala Petroica macrocephala PetroKazakhstan Inc. Petrokov Petrokrepost petrol petrol petrol petrol blue petrol blue petrol bomb petrol bomb petrol bomb Petrol Bombs Petrol Bombs Petrol Bombs Petrol Camlap Trolley Bag

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