Port Silt Loam is the

state soil This is a list of U.S. state soils. A state soil is a soil that has special significance to a particular U.S. state, state. Each state in the United States has selected a state soil, twenty of which have been legislatively established. These offic ...

Oklahoma Oklahoma (; Choctaw language, Choctaw: ; chr, ᎣᎧᎳᎰᎹ, ''Okalahoma'' ) is a U.S. state, state in the South Central United States, South Central region of the United States, bordered by Texas on the south and west, Kansas on the nor ...

. This type of

soil Soil, also commonly referred to as earth or dirt, is a mixture of organic matter, minerals, gases, liquids, and organisms that together support life. Some scientific definitions distinguish ''dirt'' from ''soil'' by restricting the former te ...

is reddish in color due to the weathering of reddish

sandstones Sandstone is a clastic sedimentary rock composed mainly of sand-sized (0.0625 to 2 mm) silicate grains. Sandstones comprise about 20–25% of all sedimentary rocks. Most sandstone is composed of quartz or feldspar (both silicates) b ...

siltstones Siltstone, also known as aleurolite, is a clastic sedimentary rock that is composed mostly of silt. It is a form of mudrock with a low clay mineral content, which can be distinguished from shale by its lack of fissility.Blatt ''et al.'' 1980, pp. ...

, and

shales Shale is a fine-grained, clastic sedimentary rock formed from mud that is a mix of flakes of clay minerals (hydrous aluminium phyllosilicates, e.g. kaolin, Al2 Si2 O5( OH)4) and tiny fragments (silt-sized particles) of other minerals, especiall ...

of the

Permian The Permian ( ) is a geologic period and stratigraphic system which spans 47 million years from the end of the Carboniferous Period million years ago (Mya), to the beginning of the Triassic Period 251.9 Mya. It is the last period of the Paleoz ...

period. It is a medium-textured alluvial soil deposited along flood plains. Port Silt Loam can be found in 33 of the 77 counties in Oklahoma and covers around one million acres (4,000 km²). The name comes from the small community of

Port A port is a maritime facility comprising one or more wharves or loading areas, where ships load and discharge cargo and passengers. Although usually situated on a sea coast or estuary, ports can also be found far inland, such as Ham ...

, in

Washita County Washita County is a county located in the U.S. state of Oklahoma. As of the 2010 census, the population was 11,629. Its county seat is New Cordell. The county seat was formerly located in Cloud Chief. The county was created in 1891. History ...

, and the texture of the top soil (

silt loam Loam (in geology and soil science) is soil composed mostly of sand (particle size > ), silt (particle size > ), and a smaller amount of clay (particle size < ). By weight, its mineral composition is about 40–40–20% concentration of sand–sil ...

External links

Official Series Description - Port Series

Port Silt Loam Brouchure
(published by the

Oklahoma Conservation Commission The Oklahoma Conservation Commission is an agency of the government of Oklahoma under the Governor of Oklahoma. It is the duty of the Commission to conserve Oklahoma's land and water. The Commission is also responsible for upstream flood control ...

) * tp://ftp-fc.sc.egov.usda.gov/NSSC/StateSoil_Profiles/ok_soil.pdf Port - Oklahoma State Soil (pdf){dead link, date=January 2018 , bot=InternetArchiveBot , fix-attempted=yes Pedology Soil in the United States Geology of Oklahoma Symbols of Oklahoma Great Plains Types of soil

See also

External links