Glasier

Glasier atau 'glasiar' ialah sungai ais yang bergerak perlahan dan berdsaiz besar. Asalnya terbentuk dari salji yang turun di kawasan pergunungan . Hasil tarikan graviti, salji yang membeku menjadi ais dan turun ke kaki gunung melalui lurah sungai .

Di sepanjang sungai glasier, terbentuk pelbagai rupa bumi seperti morain, drumlin, esker, sungai glasier , tasik fiord, puncak piramid, rabung arete, kame, kettles dan lain-lain.

Kajian saintifik glasier dinamakan glasiologi.

Aletsch Glacier, Switzerland

Icebergs breaking off glaciers at Cape York, Greenland

Mouth of the Schlatenkees Glacier near Innergschlöß, Austria.

Formation of glacial ice

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The Perito-Moreno Glacier, showing cracks in brittle upper layer

Ice cracks in the Titlis Glacier

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Signs warning of the hazards of a glacier in New Zealand

A drumlin field forms after a glacier has modified the landscape. The teardrop-shaped formations denote the direction of the ice flow.

Diagram of glacial plucking and abrasion

A glaciated valley in the Mount Hood Wilderness showing the characteristic U-shape and flat bottom.

This image shows the termini of the glaciers in the Bhutan Himalaya. Glacial lakes have been rapidly forming on the surface of the debris-covered glaciers in this region during the last few decades.

Features of a glacial landscape

Landscape produced by a receding glacier

Isostatic pressure by a glacier on the Earth's crust