value	description	source	basis	axis	genesis	SMR comments
Alkalic	Peacock (1931) alkali-lime index is less than 51, i.e. the total of alkali oxides (Na20+K20) exceeds that of Ca0 at a silica content less than 51 percent.	Neuendorf et al 2005; SMR	chemical	(Na+K)/Ca oxides	igneous	technically should be defined for a series of related (comagmatic) igneous rocks)
Alkali-calcic	Peacock (1931) alkali-lime index is between 51 and 56, i.e. the total of alkali oxides (Na20+K20) exceeds that of Ca0 at a silica content between 51 and 56 percent.	Neuendorf et al 2005; SMR	chemical	(Na+K)/Ca oxides	igneous	technically should be defined for a series of related (comagmatic) igneous rocks)
ALKALINE	syn alkalic		deprecate		igneous	use alkalic
AMPHIBOLE PHYRIC			deprecate		igneous
Amphibole-rich mafic	material consisting  of greater than or equal to 40 percent dark-colored amphibole	NADM SLTTm nongenetic	mineralogy	amphibole	NA	too specific, use earth material composition
AMPHIBOLITIC			deprecate	Amphibole	metamorphic	usage generally seems to mean amphibolite-like, but quantification is unconstrained
BIOTITE PHYRIC			deprecate	biotite	igneous	don'tinclude phenocryst mineralogy as composition category
BIOTITIC			deprecate	biotite	NA	not quantitative, overlaps with mafic
Calc-alkalic	Peacock (1931) alkali-lime index is between 56 and 61, i.e. the total of alkali oxides (Na20+K20) exceeds that of Ca0 at a silica content between 56 and 61 percent.	Neuendorf et al 2005; SMR	chemical	(Na+K)/Ca oxides	igneous	technically should be defined for a series of related (comagmatic) igneous rocks)
Calcareous quartzo-feldspathic	material consists of 10-50 percent carbonate or calcsilicate minerals, and micaceous or aluminous minerals form less than 40 percent of non-(carbonate or calcsilicate) minerals and quartz forms less than 60 percent  of the non-carbonate + calcsilicate minerals.	NADM metamorphic rock vocabulary SLTTm1.0	deprecate	carbonate, calcsilicate, micaceous/aluminous, quartz	NA	since multiple values are allowed for composition category, this could be represented as calcareous, and quarzto-feldspathic
Calcareous-pelitic	material consists of 10-50 percent carbonate or calcsilicate minerals, and micaceous or aluminous minerals form greater than or equal to 40 percent of non-(carbonate or calcsilicate) minerals.	NADM metamorphic rock vocabulary SLTTm1.0	deprecate	carbonate, calcsilicate, micaceous/aluminous, quartz	NA	since multiple values are allowed for composition category, this could be represented as calcareous, and pelitic
Calcareous-quartzose	material consists of 10-50 percent carbonate or calcsilicate minerals, and micaceous or aluminous minerals form less than 40 percent of non-(carbonate or calcsilicate) minerals, and quartz forms greater than or equal to 75 percent of the non-(carbonate + calcsilicate) minerals	NADM metamorphic rock vocabulary SLTTm1.0	deprecate	carbonate, calcsilicate, micaceous/aluminous, quartz	NA	since multiple values are allowed for composition category, this could be represented as calcareous, and quartzsose
Calcareous-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 and carbonate + calcsilicate minerals greater than 10 percent.	NADM metamorphic rock vocabulary SLTTm1.0	deprecate	carbonate, calcsilicate, micaceous/aluminous, quartz	NA	since multiple values are allowed for composition category, this could be represented as calcareous, and semi
Calcic	Peacock (1931) alkali-lime index is greater than 61 i.e. the total of alkali oxides (Na20+K20) exceeds that of Ca0 at a silica content greater than 61 percent.	Neuendorf et al 2005; SMR	chemical	(Na+K)/Ca oxides	igneous	technically should be defined for a series of related (comagmatic) igneous rocks)
Cherty	Sedimentary material contains enough secondary-chert nodules to influence the geologist’s description		deprecate			outcrop level, Geologic unit, not material term. Deprecate
Eclogite composition	material consists of greater than 75 percent garnet (almandine-pyrope) and sodic pyroxene (omphacite).	NADM metamorphic rock vocabulary SLTTm1.0	mineralogy	garnet, pyroxene	NA	too specific, use earth material composition
Epidositic	Material consists of greater than 75 percent epidote, and greater than 50 percent of non-epidote mineral is quartz.	NADM metamorphic rock vocabulary SLTTm1.0	mineralogy	epidote	NA	too specific, use earth material composition
FELDSPAR PHYRIC			deprecate	feldspar	igneous	don'tinclude phenocryst mineralogy as composition category
FERRUGINIZED			deprecate		metasomatic	not sure what this means…
garnetifierous	significant garnet is present		mineralogy	garnet	NA	too specific, use earth material composition
Greisen composition	Material consists of greater than 70 percent quartz + muscovite or lepodilite, with accessory (greater than 1 percent)  topaz or tourmaline (or other flourine-bearing phase). In a hierarchy based purely on description, would  be a kind of semi-pelitic rock (10-40 percent aluminous minerals; less than 60 percent quartz+feldspar) or quartz-feldspathic (less than 40 percent aluminous and greater than 60 percent quartz + feldspar).	NADM metamorphic rock vocabulary SLTTm1.0	deprecate	quartz, muscovite, tourmaline	NA	duplicate value--could use semi-pelitic or quartz-feldspathic
Iron oxide bearing	greater than accessory amounts (greater than 5 percent by volume) of iron oxide mineral phases are present	Struik etal 2002; SMR defintion	mineralogy	iron oxide	NA	too specific, use earth material composition
Manganese oxide bearing	greater than accessory amounts (greater than 5 percent by volume) of manganese oxide mineral phases are present	Struik etal 2002; SMR defintion	mineralogy	MnOx	NA	too specific, use earth material composition
MUSCOVITE-BEARING	Material contains signficant muscovite		deprecate	muscovite	NA	better represented through material composition to minerals
Non-carbonate chemical	a chemical sedimentary or metasomatic rock predominantly comprised of non-carbonate minerals		deprecate	carbonate	NA	too genetic, no composition information
OLIVINE PHYRIC			deprecate	olivine	igneous	don'tinclude phenocryst mineralogy as composition category
Organic	organic—“Pertaining or relating to a compound containing carbon, especially as an essential component....A substance containing carbon, as in such expressions as “organic-rich shale” Glossary of Geology (Jackson, 1997, p. 451)	Jackson 1997	deprecate	carbon	NA	genetic denotation is undesirable
PALAGONITIZED			alteration	palagonite	metasomatic	Palagonitization is a common, but imperfectly defined process that greatly modifies the physical and chemical properties of glassy basaltic tephra deposited in subaquatic/subglacial environments , ,, the process of palagonitization (1) initially results in the formation of ‘palagonitized glass’, a quasi- or nano-crystalline, rind-like material that contains smectite, as well as lesser amounts of other clays (e.g. serpentine), and (2) eventually results in consolidation of tephra, mediated through the accretion of palagonitized glass and later-formed authigenic cements. (Schiffman, Southard, Eberl, Bishop, 2002, Geological Society, London, Special Publications; v. 202; p. 393-405; DOI: 10.1144/GSL.SP.2002.202.01.20)  Palagonite is an altered basaltic glass (Neuendorf et al 2005).
PYROXENE PHYRIC			deprecate	pyroxene	igneous	don'tinclude phenocryst mineralogy as composition category
PYROXENE-BEARING	Material contains significant pyroxene		mineralogy	pyroxene	NA	better represented through material composition to minerals
QUARTZ PHYRIC			deprecate	quartz	igneous	don'tinclude phenocryst mineralogy as composition category
SEMIPELITIC			deprecate
Serpentinite composition	Material consists of greater than 75 percent serpentine.	NADM metamorphic rock vocabulary SLTTm1.0	deprecate	serpentine	NA	too specific
SILICEOUS			deprecate	SiO2	NA	meaning not quantified
Siliciclastic	a clastic sedimentary rock comprised of silicate minerals		sed petrography	quartz feldspar	sedimentary	redundant with silicic or quartzo-feldspathic
Special composition	Mineral composition that doesn't fit in any other defined composition class. A modal mineral description is essential. Material consists of less than 40 percent ferromagnesian minerals and  less than 50 percent carbonate + calcsilicate minerals and less than 70 percent Q+Fs + mica + aluminous minerals.	NADM metamorphic rock vocabulary SLTTm1.0	deprecate	carbonate, calcsilicate, micaceous/aluminous, quartz	NA	duplicate with other composition
x Argillic	Apparently clay mineral-rich material.	NADM metamorphic rock vocabulary SLTTm1.0	deprecate	clay	NA	duplicate
xacid	an igneous rock containing greater than 60-65% SiO2 by weight		deprecate	SIO2	igneous	use high silica, intermediate silica, low silicat to make meaning clearer.
xACID-INTERMEDIATE			deprecate	SIO2	igneous	use high silica, intermediate silica, low silicat to make meaning clearer.
xArgillaceous	Sedimentary material contains > 10% detrital clay minerals, based on field inspection		deprecate	clay	sedimentary	use argillic
xbasic	an igneous rock containing SiO2 approximately in the range 44-52%		deprecate	SiO2	igneous	use high silica, intermediate silica, low silicat to make meaning clearer.
xBASIC-ULTRABASIC			deprecate	SiO2	igneous	use high silica, intermediate silica, low silicat to make meaning clearer.
xcalcsilicate or impure carbonate	a sedimentary or metamorphosed sedimentary rock comprised of calcsilicate or carbonate and silicate minerals		deprecate	carbonate, calcsilicate	sedimentary, metamorphic	use Impure calcsilicate or carbonate
xcarbonaceous	“(a) Said of a rock or sediment that is rich in carbon; coaly.  (b) Said of a sediment containing organic matter” (Jackson, 1997, p. 39).	Jackson 1997	deprecate	carbon, hydrocarbon	NA
xcarbonate	Material composed of carbonate minerals		deprecate	carbonate	NA
xINTERMEDIATE-BASIC			deprecate	SiO2	igneous	use high silica, intermediate silica, low silicat to make meaning clearer.
xPSAMMITIC	deprecate		deprecate			Originally used as synonym for arenite; used to describe metamorphic rock derived from sandy protolith (Neuendorf et al2005); connotation of quartzo-feldspathic composition is common
xquartz-lithic			deprecate	QFL		not clear what this is supposed to mean
xQuartzose	Material contains enough quartz to influence the geologist’s description		deprecate	quartz		duplicate
xultrabasic	an igneous rock containing less than about 44% SiO2		deprecate	SiO2	igneous	use high silica, intermediate silica, low silicat to make meaning clearer.