[DOC] [TLE] The Geological versus the Petrographical Classification of ... - JStor [PAR] larities exhibited by rocks in these respects lead to classes, groups ... value as 
applied to the general science of geology -the history of the earth, or .... be used 
in the systematic classification of petrography, so many sided is .... to all 
concerned. [DOC] [TLE] The Genetic Classification of Rocks and Ore Deposits [PAR] A scientific classification in accordance with these principles presupposes the ... 
Having decided on a definite geological grouping of formative processes in this 
way, ... The use of intrinsic data and other non-genetic data in petrography finds 
its ... is made in accordance with the geological action of the processes 
concerned. [DOC] [TLE] petrology | science | Britannica.com [PAR] 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. ... Petrography is primarily 
concerned with the systematic classification and ... Learn More in these related 
articles:. [DOC] [TLE] geology | science | Britannica.com [PAR] May 7, 2015 ... Geology, the fields of study concerned with the solid Earth. ... Geochemistry is the 
study of the composition of these different types of rocks. ..... is determined with 
the petrographic polarizing microscope); (3) the classification of... [DOC] [TLE] Geologist - Wikipedia [PAR] A geologist is a scientist who studies the solid and liquid matter that constitutes 
the Earth as well as the processes and history that have shaped it. Geologists 
usually engage in studying geology. Geologists, studying more of an applied 
science than a theoretical one, must ... their studies are used to warn the general 
public of the occurrence of these... [DOC] [TLE] Petrography - Wikipedia [PAR] Petrography is a branch of petrology that focuses on detailed descriptions of 
rocks. Someone who studies petrography is called a petrographer. The mineral 
content and the textural relationships within the rock are described in detail. The 
classification of rocks is based on the information acquired during the ... 
Petrography as a science began in 1828 when Scottish physicist William... [DOC] [TLE] Geology - Wikipedia [PAR] Geology is an earth science comprising the study of solid Earth, the rocks of 
which it is ... These typically fall into one of two categories: rock and 
unconsolidated ..... of rock samples using a petrographic microscope, where the 
minerals can be .... by six years, although it was constructed using a different 
classification of rocks. [DOC] [TLE] Classification of Igneous Rocks [PAR] These classifications are needed for many volcanic rocks that are either too ... 
classifications are not very useful for the field geologist or petrographer who is 
just... [DOC] [TLE] Petrographical - definition of petrographical by The Free Dictionary [PAR] n. The description and classification of rocks. ... (Geological Science) the branch 
of petrology concerned with the description and ... petrographic, petrographical, 
adj. ... Based on these data a sedimentolgoical and petrographical log has been
... [DOC] [TLE] Petrography - definition of petrography by The Free Dictionary [PAR] Define petrography. petrography synonyms, petrography pronunciation, 
petrography ... The description and classification of rocks. ... (Geological Science) 
the branch of petrology concerned with the description and classification of rocks. 
... the last of these dates, although its petrography has not yet been studied (Cleal 
et al. [DOC] [TLE] Petrography | Article about Petrography by The Free Dictionary [PAR] the study of rocks, which is concerned with their mineralogical and chemical ... 
Petrography, a science of the geological cycle, is closely associated with ... 
These methods require the use of polarizing microscopes and other instruments. 
... to establish rational rock classifications, to determine prospecting criteria for 
different... [DOC] [TLE] The IUGS systematics of igneous rocks - The University of Texas at ... [PAR] nomenclature for these classifications necessitates only 297 rock names out of 
the c. 1500 that exist. ... descriptive petrography of the igneous rocks' in four ... 
cooperation in science, although some had been possible through ... Geological 
Sciences Subcommission on the Systematics of .... is the concern of the 
International. [DOC] [TLE] Petrography facts, information, pictures | Encyclopedia.com articles ... [PAR]

Question: In the science of geology, petrographers are concerned with classifying these
Answer: rocks