earth science

Miria Formation

Miria Formation is a earth 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 Miria Formation rather than just read about it. In short: The Miria Formation is a Late Cretaceous geologic formation, in Western Australia. Possible indeterminate theropod remains have been recovered from it, as well as those of sea turtles, and possible azhdarchid pterosaurs.

Key takeaways

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

Reference excerpt

The Miria Formation is a Late Cretaceous geologic formation, in Western Australia. Possible indeterminate theropod remains have been recovered from it, as well as those of sea turtles, and possible azhdarchid pterosaurs. The lithology of the unit consists of calcarenite with abundant phosphatic nodules. The formation is a layer between 0.6 and 2.1 metres in thickness, a surface deposited during the end of the Cretaceous in the late Maastrichtian period around sixty five million years ago. The composition is foraminiferal calcisiltite and calcarenite and is rich in macrofossils of a diverse range of species. The specimens of ammonites date the Miria Marl of the Giralia Anticline layer to a period of formation at a major extinction event in the Cretaceous. The formation shows the K/T boundary very distinctly, and is the only place on the Australian continent to present the globally correlated phenomenon. The site contains fossil remains of the ammonites that were widely dispersed across the globe in the Cretaceous and that confidently date the stratigraphy of the formation across the greatest known mass extinction event. The Miria Marl layer has revealed highly diverse fossil deposits of shark teeth and coral species that are also found in the former Gondwanan land masses in southern India and the Antarctic.

References

Worked examples

Example 1 — a first encounter with Miria Formation

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

In research: Miria Formation appears in earth 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 Miria Formation 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: Miria Formation is common in secondary-school and first-year university syllabi. It links to neighbouring topics Cretaceous System of Australia, Fossiliferous stratigraphic units of Oceania, Geologic formations of Australia, so understanding it makes those chapters shorter.
In everyday life: Look for Miria Formation 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 Miria Formation in 20 minutes

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

Frequently asked questions

What is Miria Formation in simple terms?

Why does Miria Formation matter?

Because it connects several earth 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 Miria Formation?

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 Miria Formation.