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Drumlin fields look like swarms of giant hills

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When glaciers aggressively move over loose sediment, they sometimes smear the dirt into elongated, teardrop-shaped hills called drumlins. They almost always occur in massive clusters, making the scarred landscape look like a massive swarm of giant, geological tadpoles all swimming in the exact direction the massive ice sheets flowed.

Drumlin fields look like swarms of giant hills
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