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Ma-le'l Dunes


About this site

You are standing at the leading edge of a large open area of moving sand, called a dunefield, which was likely set into motion as the result of a "megaquake" in 1700. Sand has continued to migrate east reaching the Mad River Slough in 2024. Your participation in photo chronicling the movement of the dunefield contributes to ongoing research that is providing information to prepare for and adapt to climate change along our coast. Thank you!

About Humboldt Bay National Wildlife Refuge

The north coast of California is one of the most beautiful and biologically rich places in the world. The coastal habitats conserved at Humboldt Bay and Castle Rock National Wildlfie Refuges - from lush wetlands to fragile dunes and jutting seastacks - support an incredible wealth of plants, fish, and wildlife.

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Chronolog is a monitoring tool for parks, nature centers, wildlife organizations, schools, and museums worldwide. With over 100,000 contributors across 300 organizations, Chronolog is on a mission to engage communities with nature while recording important natural changes.

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