earth science

Snowdonia

Snowdonia 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 Snowdonia rather than just read about it. In short: Snowdonia, or Eryri (Welsh: [ɛrəˈri] ), is a mountainous region and national park in North Wales. It contains all 15 mountains in Wales over 3000 feet high, including the country's highest, Snowdon (Yr Wyddfa), which is 1,085 metres (3,560 ft) tall.

Key takeaways

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

Reference excerpt

Snowdonia, or Eryri (Welsh: [ɛrəˈri] ), is a mountainous region and national park in North Wales. It contains all 15 mountains in Wales over 3000 feet high, including the country's highest, Snowdon (Yr Wyddfa), which is 1,085 metres (3,560 ft) tall. These peaks are all part of the Snowdon, Glyderau, and Carneddau ranges in the north of the region. The lower Moelwynion and Moel Hebog ranges lie immediately to the south. The national park has an area of 823 square miles (2,130 km2), and covers most of central and southern Gwynedd and the western part of Conwy County Borough. This is much larger than the area traditionally considered Snowdonia, and in addition to the five ranges above includes the Rhinogydd, Cadair Idris, and Aran ranges and the Dyfi Hills. It also includes most of the coast between Porthmadog and Aberdyfi. The park was the first of the three national parks of Wales to be designated, in October 1951, and the third in the UK after the Peak District and Lake District, which were established in April and May 1951, respectively. The park received 3.89 million visitors in 2015.

Toponymy The name "Snowdon" means "snow hill" and is derived from the Old English elements "snāw" and "dūn", the latter meaning "hill". It is first recorded as Snawdune in 1095. "Snowdonia" is derived from the name of the mountain and is first recorded in 1284, but there is no evidence it survived in common use until it was re-popularised in the 19th century. The Welsh name of the mountain is Yr Wyddfa, and is unrelated to the name of the area. Eryri is first recorded in 1191. It likely derived from eryr, meaning "ridge", with the collective form eryri referring to the area around Snowdon. A popular interpretation is that the name means "place of the eagle", as eryr also means "eagle" and the two meanings are probably cognate.

Extent Before the designation of the national park in 1951, "Snowdonia" was generally used to refer to a smaller upland area of northern Gwynedd centred on the Snowdon massif. F. J. North, writing in 1949, states that "When the Committee delineated provisional boundaries [of the national park], they included areas some distance beyond Snowdonia proper". In George Borrow's 1862 Wild Wales, he states that "Snowdon or Eryri is no single hill, but a mountainous region, the loftiest part of which [is] called Y Wyddfa", making a distinction between the summit of the mountain and the surrounding massif. The 1925 Mountains of Snowdonia by H. Carr & G. Lister defines "Eryri" as "composed of the two cantrefs of Arfon and Arllechwedd, and the two commotes of Nant Conwy and Eifionydd", which corresponds to Caernarfonshire with the exception of the Creuddyn Peninsula and the south-west of the Llŷn Peninsula. A 1941 article by Thomas Cotterill Warrington in the Geographical Association's Geography journal described "Snowdonia" as a "tourist's or mountaineer's term" and defined it as:

the district of which Pen y Gwryd is the centre. It is bounded by the Conway valley as far as the Fairy Glen, thence by the Lledr Valley to Dolwyddelen, then over the hills to the Ffestiniog Valley and Portmadoc, and from that point by the road to Carnarvon by Dolbenmaen and Llanllyfni. In the same article, "Eryri" is defined as the above area and the highlands between Bwlch Mawr and Yr Eifl, with reference to the definition given in The Mountains of Snowdonia. In the 1946 book National Parks for Britain, Henry Chessell defines Snowdonia is the "mountain district of Carnarvonshire", including the Snowdon, Carneddau, Glyderau, Moel Hebog, and Moelwynion massifs. The area of Merionethshire to the south, bounded by the "glen" between Dolgellau and Trawsfynydd to the east and the Afon Mawddach to the south and including Cadair Idris, is described as "really a southern continuation of Snowdonia".

National park Eryri National Park (Welsh: Parc Cenedlaethol Eryri), legally and previously officially named Snowdonia National Park in English, was established in October 1951 under the National Parks and Access to the Countryside Act 1949. The 1947 Hobhouse Report, the precursor to the Act, recommended the creation of a "North Wales National Park" with boundaries similar to those ultimately adopted, but including the area around Lake Vyrnwy and excluding the entire coastal strip from Harlech to Barmouth. It was the third national park to be established in the United Kingdom, following the Peak District and Lake District in April and May 1951. The park has an area 823 square miles (2,130 km2), covering much of central and southern Gwynedd and the western part of Conwy County Borough, and has 23 miles (37 km) of coastline. The Hobhouse Report recommended against including the town of Blaenau Ffestiniog in the national park owing to the "disfigurement" caused by its slate quarries, and it forms an enclave near the centre of the area. The coastal towns of Tywyn and Barmouth are also excluded. The park is governed by a national park authority, which was established in 1995 and has 18 members: 9 appointed by Gwynedd Council, 3 by Conwy County Borough Council, and 6 by the Welsh Government to represent the national interest. The authority's main offices are at Penrhyndeudraeth. Unlike national parks in other countries, national parks in the United Kingdom consist of both public and private land under a central planning authority. More than 26,000 people live within the park, of whom 58.6% could speak Welsh in 2011. While most of the land is either open or mountainous, there is a significant amount of agricultural activity within the park. The national park authority used the name "Snowdonia" in English-language contexts until November 2022, when it announced that it would begin a transition to using only "Eryri" in order to prioritise the Welsh language name for the area; it also began using Yr Wyddfa in preference to "Snowdon" to refer to the mountain. Following a two-year transition period, the authority announced in November 2024 that the changes would be kept due to its success in gaining support and its adoption by many businesses and by the media. The authority also announced that the national park logo would be changed to remove "Snowdonia".

Geology

… excerpt ends here. Continue reading the full article.

Illustrations

Worked examples

Example 1 — a first encounter with Snowdonia

Start with the simplest possible case. Write down what Snowdonia 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 Snowdonia 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 Snowdonia 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 Snowdonia

In research: Snowdonia 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 Snowdonia 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: Snowdonia is common in secondary-school and first-year university syllabi. It links to neighbouring topics Dark sky preserves in Wales, Geology of Wales, IUCN Category V, so understanding it makes those chapters shorter.
In everyday life: Look for Snowdonia 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 Snowdonia in 20 minutes

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

Frequently asked questions

What is Snowdonia in simple terms?

Why does Snowdonia 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 Snowdonia?

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 Snowdonia.