earth science

Geological survey

Geological survey 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 Geological survey rather than just read about it. In short: A geological survey is the systematic investigation of the geology beneath a given piece of ground for the purpose of creating a geological map or model. Geological surveying employs techniques from the traditional walk-over survey, studying outcrops and landforms, to intrusive methods, such as hand augering and machine-driven boreholes, to the use of geophysical techniques and remote sensing methods, such as aerial…

Key takeaways

Geological survey 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 Geological survey to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Geological survey from memory before moving on to harder problems.

Reference excerpt

A geological survey is the systematic investigation of the geology beneath a given piece of ground for the purpose of creating a geological map or model. Geological surveying employs techniques from the traditional walk-over survey, studying outcrops and landforms, to intrusive methods, such as hand augering and machine-driven boreholes, to the use of geophysical techniques and remote sensing methods, such as aerial photography and satellite imagery. Such surveys may be undertaken by state, province, or national geological survey organizations to maintain the geological inventory and advance the knowledge of geosciences for the benefit of the nation. A geological survey map typically superimposes the surveyed extent and boundaries of geological units on a topographic map, together with information at points (such as measurements of orientation of bedding planes) and lines (such as the intersection of faults with the land surface). The maps and reports created by geological survey organisations generally aim for geographic continuity and completeness in establishing the spatial patterns of near-surface rock units. The map may include cross sections to illustrate the three-dimensional interpretation. Subsurface geological and geophysical maps, providing limited coverage of deeper geology (known, for example, from drilling for oil or gas), are maintained internally by major oil companies and regulators. Some geological survey organisations have collaborated with them to include subsurface geology in their systematic surveys, for example, the Geological Atlas of the Western Canada Sedimentary Basin. Subsurface maps typically depict the three-dimensional form of geological surfaces by means of contours and cross sections. Computer-based models are increasingly used to provide more comprehensive information storage and greater flexibility of presentation. In the United States, the 50 state surveys are coordinated by the Association of American State Geologists. Some examples of national geological surveys are:

British Geological Survey (BGS) Bureau de Recherches Géologiques et Minières (BRGM) Central Geological Survey (Taiwan) China Geological Survey Federal Institute for Geosciences and Natural Resources (BGR, Germany) Geological and Mining Institute of Spain Geological Survey of Austria Geological Survey of Canada Geological Survey of Denmark and Greenland Geological Survey of Finland Geological Survey of India Geological Survey of Ireland Geological Survey of Japan Geological Survey of Norway Geological Survey of Pakistan Geological Survey of Slovenia Geological Survey of Sweden Geoscience Australia Saudi Geological Survey Swisstopo (Switzerland) United States Geological Survey (USGS) Individual states or provinces may also have a geological survey. Examples include:

Alberta Geological Survey (Canada) California Geological Survey (USA) Delaware Geological Survey (USA) Geological Survey of Newfoundland and Labrador (Canada) Geological Survey of Queensland (Australia) Pennsylvania Geological Survey (USA) Utah Geological Survey (USA) Indiana Geological and Water Survey (USA)

Types Cave survey, the three-dimensional mapping of caverns Geophysical survey, the systematic collection of geophysical data for spatial studies Hydrographic survey, the gathering of information about navigable waters for the purposes of safe navigation of vessels Soil survey, the mapping of the properties and varieties of soil in a given area

See also Survey Prospecting OneGeology Systems geology Primary divisions of Surveying Mine survey

External links International list of country geological surveys

Worked examples

Example 1 — a first encounter with Geological survey

Start with the simplest possible case. Write down what Geological survey 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 Geological survey 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 Geological survey 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 Geological survey

In research: Geological survey 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 Geological survey 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: Geological survey is common in secondary-school and first-year university syllabi. It links to neighbouring topics Geological surveys, Geological techniques, Geology stubs, so understanding it makes those chapters shorter.
In everyday life: Look for Geological survey 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 Geological survey in 20 minutes

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

Frequently asked questions

What is Geological survey in simple terms?

Why does Geological survey 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 Geological survey?

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 Geological survey.