Lithogeochemical unit represents the primary lithogeochemical classification scheme used in this data set. Extended table attributes of these lithogeochemical units, including chemical character of natural waters and sensitivity to acid deposition and other habitat characteristics, are described below.
| Code | Rock type | R_GpB_id values | Rock type description |
Chemical character of natural waters |
Sensitivity to acid deposition and other habitat characteristics |
|---|---|---|---|---|---|
| 11u | carbonate rocks | 1 | limestone, dolomite, and carbonate-rich clastic sediments | high alkalinity and high calcium and bicarbonate concentrations; neutral to high pH; may have high concentrations of sulfate and solutes complexed by bicarbonate ions. | low sensitivity to acid deposition; flora favoring alkaline, high-calcium soils may occur; productive aquatic faunas |
| 12u | carbonate rocks | 1 | marble, including dolomitic marble; may include some calc-silicate rock | high alkalinity and high calcium and bicarbonate concentrations; high pH; may have high concentrations of sulfate and solutes complexed by bicarbonate ions. | low sensitivity to acid deposition; flora favoring alkaline, high-calcium soils may occur; productive aquatic faunas |
| 12g | carbonate rocks | 1 | Rock_type_description: marble, including dolomitic marble; may contains variable amounts of graphite or organic materials | high alkalinity and high calcium and bicarbonate concentrations; high pH; may have high concentrations of sulfate and solutes complexed by bicarbonate ions. | low sensitivity to acid deposition; flora favoring alkaline, high-calcium soils may occur; productive aquatic faunas |
| 12gc | carbonate rocks | 1 | marble; may contain variable amounts of carbonate minerals and organic materials | high alkalinity and high calcium and bicarbonate concentrations; neutral to high pH; may have high concentrations of sulfate and solutes complexed by bicarbonate ions. | low sensitivity to acid deposition; flora favoring alkaline, high-calcium soils may occur; productive aquatic faunas |
| 12gs | carbonate rocks | 1 | sulfidic marble; may include some calc-silicate rock unit may contain minor amounts of pyrite and (or)pyrrhotite and (or) variable amounts of organic materials, sufficient to cause a rusty-weathering characteristic. | high alkalinity and high calcium and bicarbonate concentrations; neutral to high pH; may have high concentrations of sulfate and solutes complexed by bicarbonate ions. | low sensitivity to acid deposition; flora favoring alkaline, high-calcium soils may occur; productive aquatic faunas |
| 12s | carbonate rocks | 1 | sulfidic marble; may include some calc-silicate rock | high alkalinity and high calcium and bicarbonate concentrations; neutral to high pH; may have high concentrations of sulfate and solutes complexed by bicarbonate ions. | low sensitivity to acid deposition; flora favoring alkaline, high-calcium soils may occur; productive aquatic faunas |
| 13u | calpelites, carbonate rocks | 10, 1 | calcareous clastic and metaclastic rocks containing approximately 15 to 45 percent carbonate minerals | high alkalinity and high calcium and bicarbonate concentrations; neutral to high pH; may have high concentrations of sulfate and solutes complexed by bicarbonate ions. | low sensitivity to acid deposition; flora favoring alkaline, high-calcium soils may occur; productive aquatic faunas |
| 21c | basin sedimentary | 20, 21 | calcareous, locally sulfidic, gray mudstone; carbonate-poor, clastic sedimentary restricted to distinct depositional basins (bedded lithologies below biotite-grade of regional metamorphism) | generally high sodium and sometimes high calcium and sulfate concentrations; ground water may have moderate to high solute concentrations where acidic or high sulfate concentrations exist; iron concentrations may be high in ground water where Eh and pH are low; distinct ground-water types may be localized within the area of the depositional basin | low to moderate sensitivity to acid deposition; clay soils; variably neutral to acidic; generally lowlands with subdued topography in the study area |
| 22u | basin sedimentary | 20, 21 | interbedded mudstone, shale, and siltstone; may contain sandstone; carbonate-poor, clastic sedimentary rocks restricted to distinct depositional basins (bedded lithologies below biotite-grade of regional metamorphism) | generally high sodium and sometimes high calcium and sulfate concentrations; ground water may have moderate to high solute concentrations where acidic or high sulfate concentrations exist; iron concentrations may be high in ground water where Eh and pH are low; distinct ground-water. | |
| 23u | basin sedimentary | 20, 21 | sandstone and interbedded sandstone and conglomerate; may contain siltstone, shale, and mudstone; primarily noncalcareous, clastic sedimentary rocks with restricted deposition in discrete fault-bounded sedimentary basins of Mississipian or younger age | variable | moderately sensitivity to acid deposition |
| 31u | pelitic rocks | 30 | slate and greywacke;primarily noncalcareous, clastic sedimentary rocks at or above biotite-grade of regional metamorphism. | low to moderate solute concentrations; generally low calcium-to-sodium ratios; variable potassium-to-sodium ratios; higher calcium concentrations when slightly calcareous | moderate to high sensitivity to acid deposition |
| 31c | calcgranofels, pelitic rocks | 11, 30 | slate and graywacke; slightly calcareous, clastic sedimentary rocks at or above biotite-grade of regional metamorphism. | low to moderate solute concentrations; variable potassium-to-sodium ratios; higher calcium concentrations when slightly calcareous. | moderate sensitivity to acid deposition |
| 31gs | pelitic rocks | 30 | graphitic and sulfidic slate and greywacke; may include some calc-silicate rock; may contain minor amounts of pyrite and (or) pyrrhotite and (or) variable amounts of organic materials, sufficient to cause a rusty-weathering characteristic | moderate solute concentrations; iron concentrations may be high in ground water where Eh and pH are low; sulfate concentrations may be high | sensitive to acid deposition; endemic floras may occur in acidic metal-rich soils over sulfide-rich horizons |
| 31s | pelitic rocks, sulfidic schists | 30, 31 | graphitic and sulfidic slate and greywacke; primarily noncalcareous, clastic sedimentary rocks at or above biotite-grade of regional metamorphism; | moderate solute concentrations; iron concentrations may be high in ground water where Eh and pH are low; sulfate concentrations may be high | sensitive to acid deposition; endemic floras may occur in acidic metal-rich soils over sulfide-rich horizons |
| 32u | pelitic rocks | 30 | pelitic schist and phyllite; may include granofels; primarily noncalcareous, clastic sedimentary rocksat or above biotite-grade of regional metamorphism | low to moderate solute concentrations; generally low calcium-to-sodium ratios; variable potassium-to-sodium ratios; higher calcium concentrations when slightly calcareous | moderate to high sensitivity to acid deposition |
| 32c | calcgranofels, metamorphic rocks | 11, 3 | pelitic schist and phyllite; may include granofels; noncalcareous to slightly calcareous; primarily noncalcareous to slightly calcareous, clastic sedimentary rocks at or above biotite-grade of regionalmetamorphism | low to moderate solute concentrations; generally low calcium-to-sodium ratios; variable potassium-to-sodium ratios; higher calcium concentrations when slightly calcareous. | low to moderate sensitivity to acid deposition |
| 32gc | metamorphic rocks | 3 | pelitic schist and phyllite; may include granofels; graphitic and variably calcareous; primarily noncalcareous, clastic sedimentary rocks at or above biotite-grade of regional metamorphism | moderate solute concentrations; iron concentrations may be high in ground water where Eh and pH are low; | low to moderate sesitivity to acid deposition |
| 32s | sulfidic schists | 31 | sulfidic schist; may include sulfidic granofels; primarily noncalcareous, clastic sedimentary rocksat or above biotite-grade of regional metamorphism | moderate solute concentrations; iron concentrations may be high in ground water where Eh and pH are low; sulfate concentrations may be high | sensitive to acid deposition; endemic floras may occur in acidic metal-rich soils over sulfide-rich horizons |
| 33u | pelitic rocks | 30 | mixed schist, granofels, and gneiss; primarily noncalcareous, clastic sedimentary rocks at or above biotite-grade of regional metamorphism | low to moderate solute concentrations; generally low calcium-to-sodium ratios; variable potassium-to-sodium ratios; higher calcium concentrations when slightly calcareous | moderate to high sensitivity to acid deposition |
| 33c | calcgranofels, metamorphic rocks | 11, 3 | mixed schist, granofels, and gneiss; noncalcareous to slightly calcareous; primarily clastic sedimentary rocks at or above biotite-grade of regional metamorphism | low to moderate solute concentrations; variable potassium-to-sodium ratios; higher calcium concentrations when slightly calcareous | low to moderate sensitivity to acid deposition |
| 33cs | calcgranofels, metamorphic rocks | 11, 3 | mixed schist, granofels, and gneiss; noncalcareous to slightly calcareous; variable accessory sulfide minerals primarily clastic sedimentary rocks at or above biotite-grade of regional metamorphism | low to moderate solute concentrations; variable potassium-to-sodium ratios; higher calcium concentrations when slightly calcareous | low to moderate sensitivity to acid deposition |
| 33s | metamorphic rocks, sulfidic schists | 3, 31 | sulfide-bearing schistose granofels and mixed schist and gneiss (sulfidic character may be local); primarily noncalcareous, clastic sedimentary rocks at or above biotite-grade of regional metamorphism | moderate solute concentrations; iron concentrations may be high in ground water where Eh and pH are low; sulfate concentrations may be high | moderately sensitive to acid deposition; endemic floras may occur in acidic metal-rich soils over sulfide-rich horizons |
| 34u | metamorphic rocks | 3 | quartzose metasandstone, quartzite,quartz granofels, and quartzose gneiss; primarily noncalcareous, clastic sedimentary rocks at or above biotite-grade of regional metamorphism | generally low solute concentrations; low pH; high potassium-to-sodium ratios | high sensitivity to acid deposition |
| 34c | calcgranofels, metamorphic rocks | 11, 3 | quartzose metasandstone, quartzite, quartz granofels, and quartzose gneiss; primarily noncalcareous, clastic sedimentary rocks at or above biotite-grade of regional metamorphism | generally low solute concentrations; low to neutral pH; high potassium-to-sodium ratios | moderate to high sensitivity to acid deposition |
| 34cs | metamorphic rocks | 3 | quartzose metasandstone, quartzite, quartz granofels, and quartzose gneiss; contains variable amounts of carbonate minerals, calc-silicate minerals, calcareous and sulfidic areas may be local; primarily noncalcareous, clastic sedimentary rocks at or above biotite-grade of regional metamorphism | low to moderate solute concentrations; iron concentrations may be high in ground water where Eh and pH are low; sulfate concentrations may be high | moderate to high sensitivity to acid deposition |
| 41u | basalt | 41 | basalt | high calcium- and magnesium-to-sodium ratios; variable silica concentrations (sometimes high due to dissolution of reactive silicates);where Eh and pH are low, iron and manganese concentrations are high | low sensitivity to acid deposition; may have endemic flora favoring alkaline, high-magnesium and low-potassium soils; productive aquatic faunas where calcium is high in surface waters |
| 42u | mafic rocks | 4 | amphibolite, greenstone, greenschist-facies metavolcanics,and schistose mafic rock with minor dispersed carbonate; | high calcium- and magnesium-to-sodium ratios; variable silica concentrations (sometimes high due to dissolution of reactive silicates);where Eh and pH are low, iron and manganese concentrations are high | low sensitivity to acid deposition; may have endemic flora favoring alkaline, high-magnesium and low-potassium soils; productive aquatic faunas where calcium is high in surface waters |
| 43u | mafic rocks | 4 | mafic gneiss and mafic lithologies mixed with felsic volcanics and(or) metaclastic lithologies | high calcium- and magnesium-to-sodium ratios; variable silica concentrations (sometimes high due to dissolution of reactive silicates);where Eh and pH are low, iron and manganese concentrations are high | low sensitivity to acid deposition; may have endemic flora favoring alkaline, high-magnesium and low-potassium soils; productive aquatic faunas where calcium is high in surface waters |
| 43s | mafic rocks | 4 | mafic gneiss and mafic lithologies mixed with felsic volcanics and(or) metaclastic lithologies; sulfide-bearing units may be local | high calcium- and magnesium-to-sodium ratios; variable silica concentrations (sometimes high due to dissolution of reactive silicates); where Eh and pH are low, iron and manganese concentrations are high | low sensitivity to acid deposition; may have endemic flora favoring alkaline, high-magnesium and low-potassium soils; productive aquatic faunas where calcium is high in surface waters |
| 44u | mafic rocks | 4 | mafic plutonic rocks, including gabbro, diorite, monzodiorite, and diabase | high calcium-and magnesium-to-sodium ratios; variable silica concentrations (sometimes high due to dissolution of reactive silicates);where Eh and pH are low, iron and manganese concentrations are high | low sensitivity to acid deposition; may have endemic flora favoring alkaline, high-magnesium and low-potassium soils; productive aquatic faunas where calcium is high in surface waters |
| 45u | mafic rocks | 4 | mixed fine-grained felsic, mafic and(or) intermediate volcanic rocks | low to moderate solute concentrations; variable concentrations of silica and major ions | variable |
| 50u | ultramafic rocks | 5 | ultramafic rocks, including serpentinites, dunites, peridotites, and talc schists | high magnesium-to-calcium ratios; relatively high silica concentrations due to dissolution of reactive silicates; ground water may have low Eh values and high metal concentrations | low sensitivity to acid deposition; frequently has endemic flora favoring high-magnesium, low-potassium, alkaline soils |
| 61u | Grenville granite, Avalon granite, peraluminous granite, alkali granite, other granite | 61, 62, 63, 64, 6 | granitoid plutonic rocks, including granite, quartz monzonite, granodiorite, tonalite, trondhjemite, and equivalent gneiss | generally low solute concentrations; relatively high bicarbonate and silica concentrations; calcium and magnesium concentrations generally are low; relatively low pH; fluoride, uranium, and radon concentrations may be high | high |
| 61v | felsic volcanics | 60 | fine-grained felsic rocks of volcanic and subvolcanic origin; includes feldspathic hypabyssal dikes and flows | generally low solute concentrations; relatively high bicarbonate and silica concentrations; calcium and magnesium concentrations generally are low; fluoride, uranium, and radon concentrations may be high | high quartz monzonite, granodiorite, trondhjemite, and equivalent gneiss |
| 62u | Grenville granite, peraluminous granite, other granite | 61, 63, 6 | granitoid plutonic rocks, including granite, quartz monzonite, granodiorite, tonalite, trondhjemite, and equivalent gneiss | generally low solute concentrations; relatively high bicarbonate and silica concentrations; calcium and magnesium concentrations generally are low; | high |
| 62n | peraluminous granite, other granite | 63, 6 | nepheline syenite, granitoid plutonic rocks | generally low solute concentrations; relatively high bicarbonate and silica concentrations; calcium and magnesium concentrations generally low; neutral to relatively high pH ground water; fluoride, uranium, and radon concentrations may be high | high |
| 70u | unconsolidated sediments | 7 | unconsolidated or poorly consolidated marine and(or) glacial sediments | variable | not applicable |
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