Soil Series Atlas

Gilpin soil series

Fine-loamy, mixed, active, mesic Typic Hapludults

050cm1 ft2 ft3 ftApTopsoil · plowed0–20 cm · 0–8 inBt1Subsoil · clay build-up20–33 cm · 8–13 inBt2Subsoil · clay build-up33–61 cm · 13–24 inCParent material61–79 cm · 24–31 inRHard bedrock79 cm and deeper · 31+ in050cmApTopsoil · plowed0–20 cm · 0–8 inBt1Subsoil · clay build-up20–33 cm · 8–13 inBt2Subsoil · clay build-up33–61 cm · 13–24 inCParent material61–79 cm · 24–31 inRHard bedrock79 cm and deeper · 31+ in
Typical pedon, to scale: 79 cm (31 in), 5 horizons.

Ultisols — strongly weathered, leached soils with a clay-enriched subsoil

With 5.84 million acres mapped, Gilpin is the 2nd-largest of 24,791 U.S. soil series. No series covers more of West Virginia: it accounts for 19.1% of the state’s mapped soil. No other Ultisol series covers as much ground. Outside its main state it also ranks high: the 2nd-largest of 400 series in Pennsylvania and the 3rd-largest of 513 series in Ohio.

Drainage
Well drained

Compare with another seriesSimilar series in the finder

Where Gilpin is mapped

5,835,549 acres in 197 soil survey areas, from current SSURGO data.

AlabamaArizonaColoradoFloridaGeorgiaIndiana: 167,107 acresKansasMaineMassachusettsMinnesotaNew JerseyNorth CarolinaNorth DakotaOklahomaPennsylvania: 1,216,407 acresSouth DakotaTexasWyomingConnecticutMissouriWest Virginia: 2,253,454 acresIllinoisNew MexicoArkansasCaliforniaDelawareDistrict of ColumbiaIowaKentucky: 748,024 acresMaryland: 93,830 acresMichiganMississippiMontanaNew HampshireNew York: 9,193 acresOhio: 686,989 acresOregonTennessee: 490,262 acresUtahVirginia: 170,284 acresWashingtonWisconsinNebraskaSouth CarolinaIdahoNevadaVermontLouisianaRhode Island

Share of all Gilpin acres

  1. West Virginia39%
  2. Pennsylvania21%
  3. Kentucky13%
  4. Ohio12%
  5. Tennessee8%
  6. Virginia3%
  7. Indiana3%
  8. Maryland2%
  9. New York0.2%

In the field

Drainage

Well drained

Drains fastStays wet

Of the 62 atlas series that are well drained, this is the largest.

Parent material
Mudstone/siltstone, shale, sandstone, residuum
Landform
Ridges/interfluves, hills
Type location
Pennsylvania

How it is classified

  1. OrderUltisols
  2. SuborderUdults
  3. Great groupHapludults
  4. SubgroupTypic Hapludults
  5. FamilyFine-loamy, mixed, active, mesic Typic Hapludultsfine-loamy particle-size classmixed mineralogy classactive cation-exchange activity classmesic soil temperature regime

Against other Ultisols

Gilpin makes up 3.09% of all mapped Ultisols — the 1st largest of 1,278 series in the order.

Solum thickness (topsoil + subsoil)

61 cm under a median of 142 cm

Depth described

79 cm under a median of 178 cm

Its relatives

20 other established series share the family “Fine-loamy, mixed, active, mesic Typic Hapludults”

  1. Gilpin5.8 M
  2. Shelocta2.3 M
  3. Rayne480 k
  4. Pineville407 k
  5. Edneytown322 k
  6. Gladstone273 k
  7. Bedington144 k
  8. Edgemont119 k
  9. Freehold95 k

Close relatives, at one scale

  1. Gilpin79 cm · Typic Hapludults
  2. Shelocta152 cm · Typic Hapludults
  3. Greenwich183 cm · Typic Hapludults
  4. Sassafras178 cm · Typic Hapludults
  5. Downer203 cm · Typic Hapludults
  6. Smithdale211 cm · Typic Hapludults

Horizon by horizon

HorizonLayerDepthThickness
ApTopsoil: plowed0–20 cm0–8 in20 cm
Bt1Subsoil: clay build-up20–33 cm8–13 in13 cm
Bt2Subsoil: clay build-up33–61 cm13–24 in28 cm
CParent material61–79 cm24–31 in18 cm
RHard bedrock79– cm31– in—

Sources: USDA–NRCS Official Series Description (revised 2014-10), Soil Classification database and SSURGO. Ranks computed by Soil Series Atlas. Method · Guides