Crevasses in glaciers form by ________ deformation.

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Crevasses in glaciers form due to brittle deformation, which occurs when the stress applied to the glacier exceeds its strength. The ice fractures and cracks, forming crevasses. Plastic deformation would result in the ice flowing without fracturing, while elastic deformation would involve the ice stretching and then returning to its original shape without permanent deformation. "Glacial" deformation is not a recognized type of deformation.

Crevasses in Glaciers Form by ________ Deformation