Soil Series Atlas

Tarrant soil series

Clayey-skeletal, smectitic, thermic Lithic Calciustolls

050cm1 ft2 ftATopsoil0–20 cm · 0–8 inAkTopsoil · lime (carbonate) build-up20–33 cm · 8–13 inRHard bedrock33–76 cm · 13–30 in050cmATopsoil0–20 cm · 0–8 inAkTopsoil · lime(carbonate) build-up20–33 cm · 8–13 inRHard bedrock33–76 cm · 13–30 in
Typical pedon, to scale: 76 cm (30 in), 3 horizons.

Mollisols — soils with a thick, dark, organic-rich topsoil

With 2.94 million acres mapped, Tarrant is the 14th-largest of 24,791 U.S. soil series. In Texas only two series cover more ground. Its description ends at 76 cm; only two atlas descriptions are shorter. Its larger relative Ector is the one other atlas series in Lithic Calciustolls; Tarrant is clayey-skeletal rather than loamy-skeletal.

Depth
Very shallow
Drainage
Well drained
Water movement
Moderately slow

Compare with another seriesSimilar series in the finder

Where Tarrant is mapped

2,936,422 acres in 42 soil survey areas, from current SSURGO data.

AlabamaArizonaColoradoFloridaGeorgiaIndianaKansasMaineMassachusettsMinnesotaNew JerseyNorth CarolinaNorth DakotaOklahoma: 13,765 acresPennsylvaniaSouth DakotaTexas: 2,922,657 acresWyomingConnecticutMissouriWest VirginiaIllinoisNew MexicoArkansasCaliforniaDelawareDistrict of ColumbiaIowaKentuckyMarylandMichiganMississippiMontanaNew HampshireNew YorkOhioOregonTennesseeUtahVirginiaWashingtonWisconsinNebraskaSouth CarolinaIdahoNevadaVermontLouisianaRhode Island

Share of all Tarrant acres

  1. Texas100%
  2. Oklahoma0.5%
  • Rank in the state · share of its mapped soil
  • Texas 3rd of 1,565 · 1.89%

In the field

Drainage

Well drained

Drains fastStays wet

Soil depth

Very shallow

ShallowDeep

Ector and Eckrant also are classed very shallow.

Permeability

Moderately slow

SlowFast
Parent material
Residuum, limestone, marl/chalk
Landform
Hillslopes, hills, ridges/interfluves
Type location
Texas

How it is classified

  1. OrderMollisols
  2. SuborderUstolls
  3. Great groupCalciustolls
  4. SubgroupLithic Calciustolls
  5. FamilyClayey-skeletal, smectitic, thermic Lithic Calciustollsclayey-skeletal particle-size classsmectitic mineralogy classthermic soil temperature regime

Against other Mollisols

Tarrant makes up 0.67% of all mapped Mollisols — the 5th largest of 7,593 series in the order.

Depth described

76 cm under a median of 152 cm

Its relatives

Close relatives, at one scale

  1. Tarrant76 cm · Lithic Calciustolls
  2. Ector102 cm · Lithic Calciustolls
  3. Zahl152 cm · Typic Calciustolls

Horizon by horizon

HorizonLayerDepthThickness
ATopsoil0–20 cm0–8 in20 cm
AkTopsoil: lime (carbonate) build-up20–33 cm8–13 in13 cm
RHard bedrock33–76 cm13–30 in43 cm

Sources: USDA–NRCS Official Series Description (revised 2016-10), Soil Classification database and SSURGO. Ranks computed by Soil Series Atlas. Method · Guides