URI	prefLabel	Definition	Source
http://resource.geosciml.org/classifier/cgi/compositioncategory/argillic	argillic	Greater than accessory amount (greater than 5 percent by volume) of clay is present	This vocabulary
http://resource.geosciml.org/classifier/cgi/compositioncategory/arkosic_detrital_mode	arkosic detrital mode	"Sandstone petrographic composition term indicating that detrital mode for clastic rock (Q-F-L) includes less than 75 percent quartz and the feldspar to lithic ratio is greater than 3 to 1. This corresponds to the arkose field of Folk (1968). For clastic rocks with little or no matrix and cement, rocks in this detrital mode composition category will also have quartz-feldspathic mineralogical composition."	Folk1968
http://resource.geosciml.org/classifier/cgi/compositioncategory/asphaltic	asphaltic	"Material contains a significant amount of asphalt, which is a 'dark brown to black viscous liquid or low-melting solid bitumen that consists almost entirely of carbon and hydrogen...[and] formed in oil-bearing rocks by the evaporation of volatiles...' (Jackson, 1997, p. 39)."	Jackson 1997
http://resource.geosciml.org/classifier/cgi/compositioncategory/barium_bearing_carbonate_chemistry	barium bearing carbonate chemistry	"CO3 is the predominant anion, and greater than 5 mole percent of cations are Ba."	This vocabulary
http://resource.geosciml.org/classifier/cgi/compositioncategory/bioclastic	bioclastic	Carbonate sedimentary material contains significant broken skeletal material	This vocabulary
http://resource.geosciml.org/classifier/cgi/compositioncategory/calcareous	calcareous	"Calcium carbonate minerals are present, carbonate minerals form less than 50 percent of rock, material contains sufficient CaCO3 to react forming bubbles when hydrochloric acid is applied."	NADM SLTTm 2004
http://resource.geosciml.org/classifier/cgi/compositioncategory/calcareous_monomeralic_carbonate	calcareous monomeralic carbonate	"Carbonate minerals form greater than 75 percent of rock, and calcium carbonate minerals forms greater than 75 percent of carbonate minerals."	NADM SLTTm 2004
http://resource.geosciml.org/classifier/cgi/compositioncategory/calcium_rich_carbonate_chemistry	calcium rich carbonate chemistry	"CO3 is the predominante anion, and the Ca is the most abundant (mole percent) cation."	"Struik etal 2002, This vocabulary"
http://resource.geosciml.org/classifier/cgi/compositioncategory/calcsilicate	calcsilicate	Material consists of greater than or equal to 50 percent calcsilicate or carbonate minerals and carbonate minerals less than or equal to calcsilicate minerals in mineral mode.	NADM SLTTm 2004
http://resource.geosciml.org/classifier/cgi/compositioncategory/calcsilicate_bearing	calcsilicate bearing	"Calcsilicate minerals of any sort are present, but less than 50 percent of rock"	This vocabulary
http://resource.geosciml.org/classifier/cgi/compositioncategory/carbonaceous	carbonaceous	"Material containing significant carbon or hydrocarbon mineral phases, including graphite, coal, oil, gas, lignite, peat."	This vocabulary
http://resource.geosciml.org/classifier/cgi/compositioncategory/carbonaceous_chemistry	carbonaceous chemistry	"Containing greater than 5 percent reduced carbon in compounds that are typically the diagenetic products of dead organisms (e.g. coal, bitumen and petroleum). 5 percent value is chosen for consistency with SLTTs usage of term carbonaceous."	"Struik2002, SLTTs2004, This vocabulary"
http://resource.geosciml.org/classifier/cgi/compositioncategory/carbonate	carbonate	"Material consists of greater than 50 percent calcsilicate or carbonate minerals and carbonate minerals greater than calcsilicate minerals in mineral mode. Metacarbonate of NADMSC SLTTm (2004) terminology, adopted here for non-genetic use."	NADM SLTTm 2004
http://resource.geosciml.org/classifier/cgi/compositioncategory/carbonate_bearing	carbonate bearing	"Carbonate minerals of any sort are present, but less than 50 percent of rock."	This vocabulary
http://resource.geosciml.org/classifier/cgi/compositioncategory/carbonate_chemistry	carbonate chemistry	"The carbonate (CO3) anion is the predominant anion (by mole percent) in chemical analysis. Sub-categories may be defined by dominant cation. Material in this chemical class overlaps with the monomineralic carbonate class, and probably overlaps with the Carbonate class in the mineralogical composition classification."	"Struik etal 2002, This vocabulary"
http://resource.geosciml.org/classifier/cgi/compositioncategory/chloride_chemistry	chloride chemistry	Chloride is the most abundant (mole percent) anion	"Struik etal 2002, This vocabulary"
http://resource.geosciml.org/classifier/cgi/compositioncategory/chloritic	chloritic	Greater than accessory amount (greater than 5 percent by volume) of chlorite group minerals are present	This vocabulary
http://resource.geosciml.org/classifier/cgi/compositioncategory/composition_not_specified	composition not specified	Composition not specified. Use in normative descriptions where any composition property is allowed.	This vocabulary
http://resource.geosciml.org/classifier/cgi/compositioncategory/dolomite_monomineralic_carbonate	dolomite monomineralic carbonate	"Carbonate minerals form greater than 75 percent of rock, and dolomite forms greater than 75 percent of carbonate minerals."	NADM SLTTm 2004
http://resource.geosciml.org/classifier/cgi/compositioncategory/dolomitic	dolomitic	"Dolomite is present, carbonate minerals form less than 50 percent of rock."	This vocabulary
http://resource.geosciml.org/classifier/cgi/compositioncategory/feldspathic	feldspathic	Sedimentary material contains significant feldspar mineral content	This vocabulary
http://resource.geosciml.org/classifier/cgi/compositioncategory/feldspathic_detrital_mode	feldspathic detrital mode	"General sandstone petrography term for a sandstone in which the ratio of feldspar to lithic fragments is greater than 1:1 and less than 75 percent quartz is present in the detrital mode. Subsumes lithic arkosic and arkosic sandstone petrographic composition classes. Usage of modifier feldspathic is consistent with petrographic subdivisions of Dott (1964) and Williams, Turner and Gilbert (1982)"	"Dott1964, Folk1968"
http://resource.geosciml.org/classifier/cgi/compositioncategory/feldspathic_lithic_detrital_mode	feldspathic lithic detrital mode	"Sandstone petrographic composition term indicating that detrital mode for clastic rock (Q-F-L) includes less than 75 percent quartz and the feldspar to lithic ratio is between 1 to 1 and 1 to 3. This corresponds to the feldspathic litharenite field of Folk (1968). Rocks in this class are likely to be quartzo-feldspathic in terms of mineralogical composition terms in this vocablary, but because the mineralogical composition of the lithic fraction is not constrainged, this correlation is not necessary."	Folk1968
http://resource.geosciml.org/classifier/cgi/compositioncategory/ferromagnesian	ferromagnesian	Material consists of greater than 40 percent dark ferromagnesian silicate minerals. Standard term defined by Bates and Jackson (1987) to mean 'containing iron and magnesium'. Subsumes mafic and ultramafic.	NADM SLTTm 2004
http://resource.geosciml.org/classifier/cgi/compositioncategory/ferruginous	ferruginous	"Greater than accessory amount (greater than 5 percent by volume) of non-silicate iron minerals (hematite, magnetite, siderite...) are present. Rocks containing abundant iron-rich silicate minerals would use the 'Ferromagnesian' terms."	This vocabulary
http://resource.geosciml.org/classifier/cgi/compositioncategory/fluoride_chemistry	fluoride chemistry	Fluorine is the most abundant (mole percent) anion	"Struik etal 2002, This vocabulary"
http://resource.geosciml.org/classifier/cgi/compositioncategory/halide_chemistry	halide chemistry	"One or more of halide group elements (F, Cl, Br, I) are most abundant (mole percent) anion"	"Struik etal 2002, This vocabulary"
http://resource.geosciml.org/classifier/cgi/compositioncategory/high_silica_chemistry	high silica chemistry	Containing 65 percent or more SiO2 by weight. Syn acid.	"Struik2002, SLTTs2004, This vocabulary"
http://resource.geosciml.org/classifier/cgi/compositioncategory/impure_calcsilicate_or_carbonate	impure calcsilicate or carbonate	Material consists of greater than 50 percent calcsilicate or carbonate minerals and relative proportion of calcsilicate and carbonate minerals is unknown or not specified.	NADM SLTTm 2004
http://resource.geosciml.org/classifier/cgi/compositioncategory/intermediate_silica_chemistry	intermediate silica chemistry	"Containing SiO2 in the range 52-65 percent, sometimes described as \intermediate\ rocks."	"Struik2002, SLTTs2004, This vocabulary"
http://resource.geosciml.org/classifier/cgi/compositioncategory/intraclastic	intraclastic	Carbonate sedimentary material contains signficant intraclast content	This vocabulary
http://resource.geosciml.org/classifier/cgi/compositioncategory/iron_bearing_carbonate_chemistry	iron bearing carbonate chemistry	"CO3 is the predominant anion, and iron is greater than 5 mole percent of the cations (includes Fe, Mg, Mn, Ba, Sr, Ca...)."	This vocabulary
http://resource.geosciml.org/classifier/cgi/compositioncategory/iron_rich_carbonate_chemistry	iron rich carbonate chemistry	"CO3 is the predominant anion, and iron is the most abundant (mole percent) cation"	This vocabulary
http://resource.geosciml.org/classifier/cgi/compositioncategory/lithic	lithic	"Sedimentary material contains significant detrital rock fragments derived by erosion from older, pre-existing rock materials"	This vocabulary
http://resource.geosciml.org/classifier/cgi/compositioncategory/lithic_arkosic_detrital_mode	lithic arkosic detrital mode	"Sandstone petrographic composition term indicating that detrital mode for clastic rock (Q-F-L) includes less than 75 percent quartz and the ratio of lithic fragments to feldspar is between 1:1 and 1:3. This corresponds to the lithic arkose field of Folk (1968), the 75 percent quartz boundary is chosen to be consistent with quartzsose composition as defined in the mineralogic compostion terms vocabulary. Because of the abundance of lithic fragments for which the mineralogic composition is not specified, and the presence of undiscernible matrix and cement that are not incuded in the detrital mode, corresondence with the mineralogical composition terms is very approximate."	Folk1968
http://resource.geosciml.org/classifier/cgi/compositioncategory/lithic_detrital_mode	lithic detrital mode	"Sandstone petrographic composition term indicating that detrital mode for clastic rock (Q-F-L) includes less than 75 percent quartz and the lithic to feldspar ratio is greater than 3 to 1. This corresponds to the litharenite field of Folk (1968). Because the mineralogy of the lithic fragments is not constrained, the mineralogical composition is largely independent of the detrital mode composition for this class."	Folk1968
http://resource.geosciml.org/classifier/cgi/compositioncategory/lithic_rich_detrital_mode	lithic rich detrital mode	"Sandstone petrographic composition term indicating that the ratio of lithic fragments to feldspar is greater than 1:1, and less than 75 percent quartz is present in the detrital mode. Because the mineralogy of the lithic fragments is not constrained, the mineralogical composition is largely independent of the detrital mode composition for this class."	"Dott1964, Folk1968"
http://resource.geosciml.org/classifier/cgi/compositioncategory/low_silica_chemistry	low silica chemistry	Containing SiO2 in the range 44-52 percent. Syn basic.	"Struik2002, SLTTs2004, This vocabulary"
http://resource.geosciml.org/classifier/cgi/compositioncategory/mafic	mafic	Material consists of greater than or equal to 40 percent and less than 90 percent ferromagnesian silicate minerals.	NADM SLTTm 2004
http://resource.geosciml.org/classifier/cgi/compositioncategory/magnesium_rich_carbonate_chemistry	magnesium rich carbonate chemistry	"CO3 is the predominant anion, and Mg is the most abundant (mole percent) cation."	"Struik etal 2002, This vocabulary"
http://resource.geosciml.org/classifier/cgi/compositioncategory/metallic_oxide_bearing	metallic oxide bearing	Greater than accessory amounts (greater than 5 percent by volume) of base metal oxide minerals such as magnetite (Fe3O4) or pyrolusite (MnO2) are present.	"Struik2002, SLTTs2004, This vocabulary"
http://resource.geosciml.org/classifier/cgi/compositioncategory/metaluminous	metaluminous	"Chemical composition term used for igneous rocks, denoting that content of aluminum oxide is greater than sodium oxide plus potassium oxide, but aluminum oxide less than sum of Na, K and Ca oxide."	Shand 1947
http://resource.geosciml.org/classifier/cgi/compositioncategory/micaceous	micaceous	Greater than accessory amount (greater than 5 percent by volume) of mica group mineral are present	This vocabulary
http://resource.geosciml.org/classifier/cgi/compositioncategory/mono_mineralic	mono mineralic	Greater than 75 percent of the material consists of a single mineral species.	NADM SLTTm 2004
http://resource.geosciml.org/classifier/cgi/compositioncategory/monomictic	monomictic	"Grains or clasts are composed of a single rock or mineral type (Jackson, 1997)"	Jackson 1997
http://resource.geosciml.org/classifier/cgi/compositioncategory/monomineralic_carbonate	monomineralic carbonate	Rock in which carbonate minerals form greater than 75 percent of rock.	NADM SLTTm 2004
http://resource.geosciml.org/classifier/cgi/compositioncategory/nitrate_chemistry	nitrate chemistry	Nitrate (NO3) is most abundant (mole percent) anion.	"Struik etal 2002, This vocabulary"
http://resource.geosciml.org/classifier/cgi/compositioncategory/other_composition	other composition	Composition is known but doesn?t' fit in any other category	This vocabulary
http://resource.geosciml.org/classifier/cgi/compositioncategory/oxide	oxide	Material predominantly composed of oxide minerals	This vocabulary
http://resource.geosciml.org/classifier/cgi/compositioncategory/pelitic	pelitic	"Material for which the sum of modal quartz+feldspar+ mica + aluminous mineral is greater than or equal to 70 percent, and aluminous mineral + mica content is greater than or equal to 40 percent."	NADM SLTTm 2004
http://resource.geosciml.org/classifier/cgi/compositioncategory/peralkaline	peralkaline	Aluminum oxide (Al2O3) is less than sum of K and Na oxide.	Shand 1947
http://resource.geosciml.org/classifier/cgi/compositioncategory/peraluminous	peraluminous	"Aluminum oxide (Al2O3) greater than sum of Na, K and Ca oxide."	Shand 1947
http://resource.geosciml.org/classifier/cgi/compositioncategory/petroliferous	petroliferous	"Crude oil or natural gas is present, generally in trace amounts, commonly detected by smell"	This vocabulary
http://resource.geosciml.org/classifier/cgi/compositioncategory/phosphate_chemistry	phosphate chemistry	Phosphate (PO4) is the most abundant (mole percent) anion.	"Struik etal 2002, This vocabulary"
http://resource.geosciml.org/classifier/cgi/compositioncategory/phosphatic	phosphatic	Greater than accessory amount (greater than 5 percent by volume) of phosphate minerals are present	This vocabulary
http://resource.geosciml.org/classifier/cgi/compositioncategory/polymictic	polymictic	Grains or clasts are composed of many mineral or rock types	"Jackson, 1997, p. 501"
http://resource.geosciml.org/classifier/cgi/compositioncategory/quartz_feldspar_pelitic	quartz feldspar pelitic	Material for which the sum of modal quartz+feldspar+ mica + aluminous mineral is greater than or equal to 70 percent.	NADM SLTTm 2004
http://resource.geosciml.org/classifier/cgi/compositioncategory/quartzo_feldspathic	quartzo feldspathic	"Material for which the sum of modal quartz+feldspar+ mica + aluminous mineral is greater than or equal to 70 percent, and quartz + feldspar (sensu Robertson, 1999) greater than 60 percent."	NADM SLTTm 2004
http://resource.geosciml.org/classifier/cgi/compositioncategory/quartzose	quartzose	Material consists of greater than or equal to 75 percent quartz.	NADM SLTTm 2004
http://resource.geosciml.org/classifier/cgi/compositioncategory/quartzose_detrital_mode	quartzose detrital mode	"Detrital mineral grains in a granular rock consist of greater than 95 percent quartz. This petrographic criteria follows the most restrictive definition of the composition field at the quartz vertex of the sandstone QFL triangle (Folk, 1968). This use of term quartzose is more restrictive that that used in the mineralogical composition term vocabulary, reflecting the interpretive significance of pure quartz sandstones in sedimentary petrology."	"Folk1968, This vocabulary"
http://resource.geosciml.org/classifier/cgi/compositioncategory/semi_pelitic	semi pelitic	"Material for which the sum of modal quartz+feldspar+ mica + aluminous mineral is greater than or equal to 70 percent, and quartz+ feldspar less than 60 percent"	NADM SLTTm 2004
http://resource.geosciml.org/classifier/cgi/compositioncategory/silicate_chemistry	silicate chemistry	"Composed of minerals whose crystal structure contains SiO4 tetrahedra, either isolated or joined through one or more oxygen atoms to form groups, chains, sheets or three-dimensional structures with metallic cations. Composition ranges from 20-100 percent SiO2. Typically some Al substitutues for silica. A survey of chemical analyses in the Georock database (query FOR ALL GEOLOGICAL SETTINGS, MATERIAL: WHOLE ROCK (AND VOLCANIC GLASS), PUB. YEARS: 2005-1970), 10/10/2005, http://georoc.mpch-mainz.gwdg.de/georoc/Entry.html) discovered that the lowest silica (Si02) content for igneous rock is about 20 percent. This is consistent with the lowest silica content found for a silicate mineral is about 21 percent for a chlorite variety found by scanning the mineral analyses in Deer, Howie, and Zussman (1966)."	"Neuendorf et al 2005, Struik 2002, This vocabulary"
http://resource.geosciml.org/classifier/cgi/compositioncategory/silicic	silicic	"Greater than accessory amount (greater than 5 percent by volume) of silica, amorphous, as quartz, or any of the silica polymorphs are present"	This vocabulary
http://resource.geosciml.org/classifier/cgi/compositioncategory/sub_feldspathic_detrital_mode	sub feldspathic detrital mode	"Sandstone petrographic composition term indicating that detrital mode for clastic rock (Q-F-L) includes less than 50 percent lithic fragments, between 75 and 95 percent quartz (thus less than 25 percent feldspar). This corresponds to the subarkose field of Folk (1968), the 75 percent quartz boundary is consistent with the quartzsose composition as defined in the mineralogic compostion terms vocabulary, but if more than a few percent 'matrix' or cement is present, this is not necessarily equivalent to the mineralogical composition term."	Folk1968
http://resource.geosciml.org/classifier/cgi/compositioncategory/sub_lithic_detrital_mode	sub lithic detrital mode	"Sandstone petrographic composition term indicating that detrital mode for clastic rock (Q-F-L) includes more than 50 percent lithic fragments, between 75 and 95 percent quartz (thus less than 25 percent feldspar). This corresponds to the sublitharenite field of Folk (1968), the 75 percent quartz boundary is consistent with quartzsose composition as defined in the mineralogic compostion terms vocabulary."	Folk1968
http://resource.geosciml.org/classifier/cgi/compositioncategory/subaluminous	subaluminous	Aluminum oxide within 10 percent of sum of Na and K oxide.	Shand 1947
http://resource.geosciml.org/classifier/cgi/compositioncategory/sulfate	sulfate	Material predominantly composed of sulfate minerals	This vocabulary
http://resource.geosciml.org/classifier/cgi/compositioncategory/sulfate_chemistry	sulfate chemistry	Sulfate is the most abundant anion	"Struik etal 2002, This vocabulary"
http://resource.geosciml.org/classifier/cgi/compositioncategory/sulfide	sulfide	Material predominantly composed of sulfide minerals	This vocabulary
http://resource.geosciml.org/classifier/cgi/compositioncategory/sulfide_bearing	sulfide bearing	Greater than accessory amount (greater than 5 percent by volume) of sulfide mineral are present	This vocabulary
http://resource.geosciml.org/classifier/cgi/compositioncategory/sulfide_chemistry	sulfide chemistry	"Sulfur is the most abundant anion, cations are metals or semimetals."	"Neuendorf et al 2005, Struik 2002, This vocabulary"
http://resource.geosciml.org/classifier/cgi/compositioncategory/sulfosalt_chemistry	sulfosalt chemistry	"Sulfide in which a semimetal (As, Sb, Bi) is present in a cation role"	"Neuendorf et al 2005, Struik 2002, This vocabulary"
http://resource.geosciml.org/classifier/cgi/compositioncategory/ultramafic	ultramafic	Material consists of greater than 90 percent ferromagnesian silicate minerals.	NADM SLTTm 2004
http://resource.geosciml.org/classifier/cgi/compositioncategory/very_low_silica_chemistry	very low silica chemistry	"Containing between about 20 and 44 percent SiO2. A survey of chemical analyses in the Georock database (query FOR ALL GEOLOGICAL SETTINGS, MATERIAL: WHOLE ROCK (AND VOLCANIC GLASS), PUB. YEARS: 2005-1970), 10/10/2005,  http://georoc.mpch-mainz.gwdg. syn ultrabasic."	"Struik2002, SLTTs2004, This vocabulary"
http://resource.geosciml.org/classifier/cgi/compositioncategory/volcanic_lithic	volcanic lithic	"Sedimentary material contains significant broken volcanic rock fragments or vitric fragments, irrespective of their pyroclastic or epiclastic origin."	This vocabulary