science

Kansan glaciation

Kansan glaciation is a science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Kansan glaciation rather than just read about it. In short: The Kansan glaciation or Kansan glacial (see Pre-Illinoian) was a glacial stage and part of an early conceptual climatic and chronological framework composed of four glacial and interglacial stages. History Kansan glaciation was used by early geomorphologists and Quaternary geologists to subdivide glacial and nonglacial deposits within north-central United States from youngest to oldest and are as follows: Wisconsin…

Key takeaways

Kansan glaciation belongs to science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Kansan glaciation to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Kansan glaciation from memory before moving on to harder problems.

Reference excerpt

The Kansan glaciation or Kansan glacial (see Pre-Illinoian) was a glacial stage and part of an early conceptual climatic and chronological framework composed of four glacial and interglacial stages.

History Kansan glaciation was used by early geomorphologists and Quaternary geologists to subdivide glacial and nonglacial deposits within north-central United States from youngest to oldest and are as follows:

Wisconsin (glacial) Sangamonian (interglacial) Illinoian (glacial) Yarmouthian (interglacial) Kansan (glacial) Aftonian (interglacial) Nebraskan (glacial) As developed between 1894 and 1909, the Kansan Stage was based on a model that assumed that the Pleistocene deposits contained only two glacial tills and one volcanic ash bed within Nebraska and Kansas. Of these two proposed glacial tills, the Kansan till, which defined the Kansan Stage, was the upper of the two glacial tills and the Nebraskan till, which defined the Nebraskan Stage, was the lower of the two glacial tills. It was argued that a single paleosol developed in the Nebraskan till and interglacial deposits separated the Kansan and Nebraskan tills. The paleosol and deposits were used to define the Aftonian (interglacial) stage that separated the Kansan and Nebraskan stages. In time, the stratigraphy of Pleistocene deposits was found to be far more complex than the two glacial tills and one volcanic ash bed on which the Yarmouthian, Kansan, Nebraskan, and Aftonian glacial – interglacial nomenclature was originally based. Detailed research by Boellstorff demonstrated that the two glacial tills and one ash bed stratigraphic model, on which the Yarmouthian, Kansan, Nebraskan, and Aftonian glacial – interglacial nomenclature was based, was completely wrong. This research found that at the type locations for the Kansan and Nebraskan tills numerous glacial tills, which were separated by numerous paleosols, existed. In addition, fission track dating and geochemical analysis demonstrated what was thought to be one volcanic ash layer was actually three separate volcanic ash layers, i.e. the 602,000 year-old Lava Creek B volcanic ash; the 1,293,000 year-old Mesa Falls volcanic ash, and the 2,003,000 year-old Huckleberry volcanic ash. In addition, detailed studies of glacial tills in Kansas have found that at different outcrops, the same glacial till has been identified as being either a "Kansan" till or "Nebraskan" till. Also, it was found that the Afton Soil (paleosol), which was used define the Aftonian interglacial, is buried by a younger glacial till that was considered to be a "type Nebraskan" glacial till as well as having developed in an older glacial till that was considered to be a "type Nebraskan" glacial till. As a result, the basic assumptions on which the Yarmouthian (interglacial), Kansan (glacial), Aftonian (interglacial), and Nebraskan (glacial) nomenclature was originally defined was found to be lacking any scientific basis. As a result, this nomenclature was abandoned by Quaternary geologists in North America and merged into the Pre-Illinoian Stage.

References

External links Aber, J.S., 2006, Regional Glaciation of Kansas and Nebraska. Archived 2008-07-04 at the Wayback Machine Emporia State University, Emporia, Kansas. anonymous, 1997, Glacial Map of North-Central United States. Work Group on Geospatial Analysis of Glaciated Environments (GAGE), INQUA Commission on Glaciation, Emporia State University, Emporia, Kansas. anonymous, 2000, Pre-Wisconsin Glaciation of Central North America. Work Group on Geospatial Analysis of Glaciated Environments (GAGE), INQUA Commission on Glaciation, Emporia State University, Emporia, Kansas. anonymous, 2007, Global correlation tables for the Quaternary. Subcommission on Quaternary Stratigraphy, Department of Geography, University of Cambridge, Cambridge, England Gibbard, P.L., S. Boreham, K.M. Cohen and A. Moscariello, 2007, Global chronostratigraphical correlation table for the last 2.7 million years v. 2007b., jpg version 844 KB. Subcommission on Quaternary Stratigraphy, Department of Geography, University of Cambridge, Cambridge, England Hallberg, G.R., ed., 1980a, Pleistocene stratigraphy in east-central Iowa., PDF version 15.6 MB. Technical information Series. no. 10. Iowa Geological Survey Bureau, Ames, IA. Hallberg, G. R., ed., 1980b, Illinoian and Pre-Illinoian stratigraphy of southeast Iowa and adjacent Illinois., PDF version 19.3 MB. Technical information Series. no. 11. Iowa Geological Survey Bureau, Ames, IA. Hallberg, G. R., T. E. Fenton, T. J. Kemmis, and G. A. Miller, 1980, Yarmouth Revisited: Midwest Friends of the Pleistocene 27th Field Conference., PDF version 4.6 MB. Guidebook no. 3. Iowa Geological Survey Bureau, Ames, IA. Roy, M., P.U. Clark, R.W. Barendregt, J.R., Glasmann, and R.J. Enkin, 2004, Glacial stratigraphy and paleomagnetism of late Cenozoic deposits of the north-central United States., PDF version, 1.2 MB. Geological Society of America Bulletin. vol. 116, no. 1–2; pp. 30–41; doi:10.1130/B25325.1

See also Glacial history of Minnesota Ice age Illinoian Stage Last Glacial Maximum Pre-Illinoian Stage Sea level rise Timeline of glaciation Yarmouthian Interglacial

Worked examples

Example 1 — a first encounter with Kansan glaciation

Start with the simplest possible case. Write down what Kansan glaciation claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Kansan glaciation before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Kansan glaciation ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Kansan glaciation

In research: Kansan glaciation appears in science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Kansan glaciation in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Kansan glaciation is common in secondary-school and first-year university syllabi. It links to neighbouring topics Glaciology of the United States, Ice ages, Pleistocene, so understanding it makes those chapters shorter.
In everyday life: Look for Kansan glaciation outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Kansan glaciation in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Kansan glaciation means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Kansan glaciation out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Kansan glaciation in simple terms?

The Kansan glaciation or Kansan glacial (see Pre-Illinoian) was a glacial stage and part of an early conceptual climatic and chronological framework composed of four glacial and interglacial stages. History Kansan glaciation was used by early geomorphologists and Quaternary geologists to subdivide…

Why does Kansan glaciation matter?

Because it connects several science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Kansan glaciation?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Kansan glaciation.