2 Soil Formation 1

Soil Formation Introductory Soil Science

Weathering ,[object Object],[object Object],[object Object],[object Object]

Where does Soil Come from? ,[object Object]

Factors affecting soil formation ,[object Object],[object Object],[object Object],[object Object],[object Object]

Parent Material ,[object Object],[object Object],[object Object],[object Object],[object Object]

Igneous Rock ,[object Object],http://enterprise.cc.uakron.edu/geology/natscigeo/Lectures/igneous/volcano2.htm#igrx

Igneous Rock Basalt Granite Black Canyon of the Gunnison http://enterprise.cc.uakron.edu/geology/natscigeo/Lectures/igneous/volcano2.htm#igrx

[object Object],[object Object]

Organic Matter is mixed with the decomposed rock material. ,[object Object],[object Object]

Break Down ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Climate ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Organisms ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Topography ,[object Object],[object Object],[object Object]

Soil Profile ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Time ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Molisol http://www.soils.umn.edu/academics/classes/soil2125/doc/s5chp2.htm

Entisol http://www.soils.umn.edu/academics/classes/soil2125/doc/s5chp2.htm

Aridisol http://www.soils.umn.edu/academics/classes/soil2125/doc/s5chp2.htm

Composition of a Good Planting Soil: ,[object Object],[object Object],[object Object],[object Object],[object Object],25% air 25% water 5 % organic matter 45% mineral matter

Why isn’t compacted soil a good soil for plants? ,[object Object],Air Water Organic Matter Mineral Matter

Where Do Most of the Soils of Western Colorado Come From?

The Four Counties of the Tri-River Area. ,[object Object],[object Object],[object Object],[object Object]

The Most Common Soil in Western Colorado is Mancos Shale.

The Grand Valley was covered by this shallow sea that advanced and retreated many times leaving a 4000 foot thick salt laden clay soil.

Today Mancos Shale Extends from Fruita to Ridgway . ,[object Object]

The Mancos Layer Extends East to Glenwood Springs ,[object Object],[object Object],Mancos Shale Maroon Formation

How Have Natural Processes, Enhanced by Humans, Improved the Mancos Shale?

The Three Rivers of the Tri-River Area ,[object Object],[object Object],[object Object],[object Object]

Erosion Causes the Rivers to Transports Large Volumes of Sediments. ,[object Object],[object Object]

Diversion of Rivers ,[object Object],Diversion Dam of the Grand Valley Canal at Palisade, CO.

The Silt Laden Irrigation Water is then Delivered to the Fields.

It Is Not Uncommon to Clean Six Inches of Silt from Irrigation Ditches Each Year.

The River Loam is then Incorporated into the Mancos Shale thus Enriching the Soil.

In addition to River Loam, Organic Matter is also Tilled into the soil. ,[object Object]

Water that Improves the Soils of Mesa County. Colorado River Gunnison River

Water sheds that make Mancos Shale Productive from Delta to Ridgway. ,[object Object],[object Object],[object Object],[object Object],A B C Ridgway Delta

Soils of Delta and Montrose ,[object Object],Delta Ridgway

Thick Layers of Sandy Soil form at the Base of the Uncompahgre Uplift. ,[object Object]

The Uncompahgre Uplift is a Series Sandstone Layers. ,[object Object],[object Object],Erosion of these sandstone layers form the sandy soils along the base of the uplift.

Sandstone Layers that form Sandy Soil. ,[object Object],Chinle Kayenta Wingate

The Uncompahgre Plateau Extends from Fruita to Ridgway. ,[object Object],These layers were eroded away as a result of the uplift.

2 Soil Formation 1

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2 Soil Formation 1