astronomy

Marshall Kay

Marshall Kay is a astronomy 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 Marshall Kay rather than just read about it. In short: Marshall Kay (November 10, 1904 – September 4, 1975) was a geologist and professor at Columbia University. He is best known for his studies of the Ordovician of New York, Newfoundland, and Nevada, but his studies were global and he published widely on the stratigraphy of the middle and upper Ordovician.

Key takeaways

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

Reference excerpt

Marshall Kay (November 10, 1904 – September 4, 1975) was a geologist and professor at Columbia University. He is best known for his studies of the Ordovician of New York, Newfoundland, and Nevada, but his studies were global and he published widely on the stratigraphy of the middle and upper Ordovician. Kay's careful fieldwork provided much geological evidence for the theory of continental drift. He was awarded the Penrose Medal in 1971. Less well known is his work for the Manhattan Project, as a geologist searching for manganese deposits. Marshall's son Robert Kay of Cornell University, daughter Elizabeth (Kay) Berner of University of Connecticut and son-in-law Robert Berner of Yale University are also geology professors. His son Richard Kay of Duke University is a biological anthropologist and vertebrate paleontologist. Kay received his Ph.D. from Columbia in 1929.

Bibliography Marshall Kay, North American geosynclines (Memoir 48), Geological Society of America, 1951. Kay, Marshall; Colbert, Edwin (1965). Stratigraphy and Life History. New York, London, Sydney: John Wiley & Sons, Inc.

References Kirtley F. Mather, A Source Book in Geology, 1900–1950. Harvard University Press, 1969. ISBN 0-674-82275-7. pp. 347–348.

External links Finding aid to Marshall Kay papers at Columbia University. Rare Book & Manuscript Library. Trenton Group scientific history, "Academic Period" bio at Harvard Archived 2013-03-06 at the Wayback Machine University of Iowa distinguished alumni award bio, 1971 Archived 2011-07-18 at the Wayback Machine Time Magazine obituary, 1975 University of Iowa Paleontology Repository Archive Archived 2011-08-23 at the Wayback Machine, finder's aid retrieved 21 April 2009. Boxes 3–5 contain stratigraphy class notes and maps and a memorial from Robert H. Dott Jr.

Worked examples

Example 1 — a first encounter with Marshall Kay

Start with the simplest possible case. Write down what Marshall Kay claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In astronomy, 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 Marshall Kay 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 Marshall Kay 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 Marshall Kay

In research: Marshall Kay appears in astronomy 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 Marshall Kay 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: Marshall Kay is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1904 births, 1975 deaths, 20th-century American geologists, so understanding it makes those chapters shorter.
In everyday life: Look for Marshall Kay 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.

Affiliate

Preply — study more efficiently by working with a personal tutor. 50% off.

How to study Marshall Kay in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Marshall Kay 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 Marshall Kay out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Marshall Kay in simple terms?

Why does Marshall Kay matter?

Because it connects several astronomy 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 Marshall Kay?

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 Marshall Kay.