A petrologist studies rocks in all their aspects viz minirals compositions, texture , structure, origin ,occurance ,alteration and relationship with other ocks.
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petrology, scientific study of rocks that deals with their composition, texture, and structure; their occurrence and distribution; and their origin in relation to physicochemical conditions and geologic processes. It is concerned with all three major types of rocks—igneous, metamorphic, and sedimentary. Petrology includes the subdisciplines of experimental petrology and petrography. Experimental petrology involves the laboratory synthesis of rocks for the purpose of ascertaining the physical and chemical conditions under which rock formation occurs. Petrography is the study of rocks in thin section by means of a petrographic microscope (i.e., an instrument that employs polarized light that vibrates in a single plane). Petrography is primarily concerned with the systematic classification and precise description of rocks.
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Key People: Norman L. Bowen Victor Moritz Goldschmidt Ferdinand Zirkel Auguste Michel-Lévy Karl Heinrich Ferdinand Rosenbusch
Related Topics: metamorphic petrology petrography experimental petrology sedimentary petrology petrogenesis
Petrology relies heavily on the principles and methods of mineralogy because most rocks consist of minerals and are formed under the same conditions. Also essential to petrological research is the careful mapping and sampling of rock units, which provide data on regional gradations of rock types and on associations unavailable by other means.
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geology: Petrology
Petrology is the study of rocks, and, because most rocks are composed of minerals, petrology...
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ᴛʀᴜᴇ
ᴘᴇᴛʀᴏʟᴏɢʏ (ғʀᴏᴍ ᴀɴᴄɪᴇɴᴛ ɢʀᴇᴇᴋ πέτρος (ᴘéᴛʀᴏs) 'ʀᴏᴄᴋ', ᴀɴᴅ λόγος (ʟóɢᴏs) 'ᴀᴄᴄᴏᴜɴᴛ, ᴇxᴘʟᴀɴᴀᴛɪᴏɴ, ɴᴀʀʀᴀᴛɪᴠᴇ') ɪs ᴛʜᴇ ʙʀᴀɴᴄʜ ᴏғ ɢᴇᴏʟᴏɢʏ ᴛʜᴀᴛ sᴛᴜᴅɪᴇs ʀᴏᴄᴋs ᴀɴᴅ ᴛʜᴇ ᴄᴏɴᴅɪᴛɪᴏɴs ᴜɴᴅᴇʀ ᴡʜɪᴄʜ ᴛʜᴇʏ ғᴏʀᴍ. ᴘᴇᴛʀᴏʟᴏɢʏ ʜᴀs ᴛʜʀᴇᴇ sᴜʙᴅɪᴠɪsɪᴏɴs: ɪɢɴᴇᴏᴜs, ᴍᴇᴛᴀᴍᴏʀᴘʜɪᴄ, ᴀɴᴅ sᴇᴅɪᴍᴇɴᴛᴀʀʏ ᴘᴇᴛʀᴏʟᴏɢʏ. ɪɢɴᴇᴏᴜs ᴀɴᴅ ᴍᴇᴛᴀᴍᴏʀᴘʜɪᴄ ᴘᴇᴛʀᴏʟᴏɢʏ ᴀʀᴇ ᴄᴏᴍᴍᴏɴʟʏ ᴛᴀᴜɢʜᴛ ᴛᴏɢᴇᴛʜᴇʀ ʙᴇᴄᴀᴜsᴇ ᴛʜᴇʏ ʙᴏᴛʜ ᴄᴏɴᴛᴀɪɴ ʜᴇᴀᴠʏ ᴜsᴇ ᴏғ ᴄʜᴇᴍɪsᴛʀʏ, ᴄʜᴇᴍɪᴄᴀʟ ᴍᴇᴛʜᴏᴅs, ᴀɴᴅ ᴘʜᴀsᴇ ᴅɪᴀɢʀᴀᴍs. sᴇᴅɪᴍᴇɴᴛᴀʀʏ ᴘᴇᴛʀᴏʟᴏɢʏ ɪs, ᴏɴ ᴛʜᴇ ᴏᴛʜᴇʀ ʜᴀɴᴅ, ᴄᴏᴍᴍᴏɴʟʏ ᴛᴀᴜɢʜᴛ ᴛᴏɢᴇᴛʜᴇʀ ᴡɪᴛʜ sᴛʀᴀᴛɪɢʀᴀᴘʜʏ ʙᴇᴄᴀᴜsᴇ ɪᴛ ᴅᴇᴀʟs ᴡɪᴛʜ ᴛʜᴇ ᴘʀᴏᴄᴇssᴇs ᴛʜᴀᴛ ғᴏʀᴍ sᴇᴅɪᴍᴇɴᴛᴀʀʏ ʀᴏᴄᴋ.[]