Discussion
Glacial till is distinguished from a river deposit by being
Answer: B
Correct answer: unsorted and unstratified
Ice carries everything it picks up at the same speed regardless of size, so when it melts it dumps clay, silt, sand, gravel and boulders together with no separation and no layering. Water and wind sort their load by size as their velocity changes, producing the stratification typical of river and dune deposits. Till is therefore recognised at once by its chaotic mixture of sizes.
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