science

Umm al Binni lake

Umm al Binni lake 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 Umm al Binni lake rather than just read about it. In short: Umm al Binni lake is a mostly dry lake within the Central Marshes in Maysan Governorate in southern Iraq. The 3.4-kilometre-wide (2.1 mi) lake is approximately 45 km (28 mi) northwest of the Tigris–Euphrates confluence.

Key takeaways

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

Reference excerpt

Umm al Binni lake is a mostly dry lake within the Central Marshes in Maysan Governorate in southern Iraq. The 3.4-kilometre-wide (2.1 mi) lake is approximately 45 km (28 mi) northwest of the Tigris–Euphrates confluence. Because of its shape, location, and other details, it was first conjectured by Sharad Master, a geoarchaeologist, to represent an impact crater. However, these claims have been disputed, with other studies finding subsidence of the underlying rock a more plausible explanation.

Evidence as an impact crater Based on the interpretation of satellite imagery, Sharad Master suggests the 3.4-kilometre-diameter (2.1 mi) dry lake may be an impact crater based on its nearly circular, slightly polygonal rim shape, and contrasting shape to other lakes in the region. However, the circularity of its shape has been disputed, with a 2018 study finding that the northeastern and southwestern sections of the lake rim were straight, corresponding to the directions of regional faulting. As to its origin, Masters rejects karst topography, salt doming, tectonic deformation, and igneous intrusion as well as possible bombing or man-made origins. However, a 2018 study concluded that the formation of the lake could be better explained by the subsidence of the underlying basement fault blocks, and that the southern part of the rim had been anthropogenically shaped.

Details and historical context Master estimates the age of the crater to be less than 5000 years old, or between 2000 and 3000 BC, due to the deposition of sediments of the Tigris-Euphrates plain as a result of the 130–150 km (81–93 mi) seaward progradation of the Persian Gulf during that time period. Some relate this apparent impact site to the 2350 BC Middle East Anomaly. A lack of writings describing this event by well-known authors like Herodotus (484–425 BC) and Nearchus (360–300 BC) or later historians implies any impact may have occurred much earlier, between 2000 and 3000 BC.

Climate change and impact effects It has been proposed that sudden climate changes and catastrophic events around 2200 BCE (including the collapse of the Sumerian civilisation) could be linked to a comet or asteroid impact. Master has conjectured that the alleged Umm al Binni impact could be responsible for this catastrophe, producing the energy equivalent to thousands of Hiroshima-sized bombs. Using equations describing impact effects based on work from Collins et al., Shoemaker, Glasstone & Dolan and others, Hamacher determined that an impacting bolide would have produced energy in the range of 190 to 750 megatons of TNT (for an asteroid and comet impact, respectively). For comparison, the Tunguska event was estimated to have an explosive force of about 10-15 megatons.

See also 4.2-kiloyear event, c. 2200 BC Burckle Crater Great Flood (China), c. 2300 BC List of possible impact structures on Earth Tunguska event

References

External links Google Earth view (taken when the lake was completely dry)

Worked examples

Example 1 — a first encounter with Umm al Binni lake

Start with the simplest possible case. Write down what Umm al Binni lake 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 Umm al Binni lake 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 Umm al Binni lake 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 Umm al Binni lake

In research: Umm al Binni lake 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 Umm al Binni lake 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: Umm al Binni lake is common in secondary-school and first-year university syllabi. It links to neighbouring topics Holocene impact craters, Lakes of Iraq, Possible impact craters on Earth, so understanding it makes those chapters shorter.
In everyday life: Look for Umm al Binni lake 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 Umm al Binni lake in 20 minutes

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

Frequently asked questions

What is Umm al Binni lake in simple terms?

Why does Umm al Binni lake 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 Umm al Binni lake?

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 Umm al Binni lake.