Drumlin

noun (countable)

/ˈdrʌmlɪn/

A smooth, elongated, oval hill of glacially deposited till, streamlined in the direction of ice flow with the steeper (stoss) end facing the oncoming glacier and the gentler (lee) tail pointing downflow. Drumlins typically occur in swarms called 'drumlin fields' and are diagnostic indicators of past continental glaciation. While drumlins are less common in India, the Vale of Kashmir shows glaciogenic landforms of similar origin, and drumlin formation is a standard UPSC topic under glacial depositional landforms.

✍️ Usage in a UPSC answer

The 'basket of eggs' topography of drumlins — aligned parallel to former ice-flow directions — provides palaeo-glaciologists with reliable proxy data for reconstructing Pleistocene ice-sheet dynamics in the Kashmir Himalaya.

Synonyms

glacial hilltill moundstreamlined glacial ridgeice-moulded hill

Antonyms

kettle holeglacial troughcirqueoutwash plain

🌱 Word Family

drumlin (noun), drumlinoid (adjective), drumlin field (compound noun), drumlinised (adjective, rare)

🔡 Root

Irish druim = ridge, back (of a hill); with diminutive suffix -lin; from Old Irish druimm

📜 Etymology

The word entered English from Irish drumlín (diminutive of druim, ridge or back), first recorded in English geological literature around 1833. The term reflects the Irish landscape of County Down and Galway, where drumlins create the characteristic 'basket of eggs' topography. The formal glaciological definition was established in the 19th century as geologists mapped glacial deposits across the British Isles and North America.

🧠 Memory Hook

DRUM-lin: imagine an upturned DRUM laid on its side — smooth, oval, and elongated — pointing in the direction the glacier 'drummed' its way forward. The steep end faced the ice, the tail drifted away.

🌍 Geography 📖 Seen in: Plate Tectonics & Volcanism — Continen...

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